27 Commits
Author SHA1 Message Date
Pierre Dubouilh 27e78fe349 tighter checks for ipset install 2026-08-28 00:34:23 +02:00
Pierre Dubouilh 2df9519224 rename json to caddy
it was misleading
2026-08-28 00:34:23 +02:00
Pierre Dubouilh e8437d33fb tighten CLF 2026-08-28 00:34:23 +02:00
Pierre Dubouilh e63e926ccf drop sshd support 2026-08-28 00:34:23 +02:00
Pierre Dubouilh ac17c11158 multiple config per target 2026-08-28 00:34:23 +02:00
Pierre Dubouilh 43392ace03 fixup readme & bump rust release 2026-05-27 18:10:50 +02:00
Pierre Dubouilh 9d0bc470cc use clap to avoid CLI settings conflicts 2026-05-27 18:10:50 +02:00
Pierre Dubouilh 956d56716e bump serde & rework status parsing 2026-05-27 18:10:50 +02:00
Pierre Dubouilh 9d677a13df gracefully introduce ipsets 2026-05-27 18:10:50 +02:00
Pierre Dubouilh 38a374858e tighten clf regex 2026-05-27 18:10:50 +02:00
Pierre Dubouilh 02f5bea4c0 fixup CLI flags 2026-05-27 18:10:50 +02:00
Pierre Dubouilh 1b9385e415 whitelist => blacklist 2026-05-27 18:10:50 +02:00
Pierre Dubouilh 491efb2adb release from CI 2025-02-09 18:46:33 +01:00
Pierre Dubouilh 833627587c Merge pull request #5 from pldubouilh/pld/optim
cleanup & optimisation
2025-02-09 17:57:40 +01:00
Pierre Dubouilh 4decd89e44 ci 2025-02-07 17:21:58 +01:00
Pierre Dubouilh 4cb7fc694a customizable http statuses 2025-02-07 13:36:21 +01:00
Pierre Dubouilh 676bc30af8 run iptables/ipset directly 2025-02-01 12:15:20 +02:00
Pierre Dubouilh 1dca57a191 readme 2025-02-01 12:15:20 +02:00
Pierre Dubouilh e0bea7e7a8 pin rust toolchain 2025-02-01 12:15:20 +02:00
Pierre Dubouilh d58ac0faee build & release on gh 2025-02-01 12:15:20 +02:00
Pierre Dubouilh 61d78a7454 json & generic parser support
also added verbose flag and configurable HTTP statuses
2025-02-01 12:15:20 +02:00
Pierre Dubouilh 9763c1dc7d add grace period 2025-02-01 12:15:20 +02:00
Pierre Dubouilh 5b9e81af5f cleanup & optimisation 2022-08-21 20:15:36 +02:00
Pierre Dubouilh 89e6d2bff1 Merge pull request #1 from pldubouilh/pld/errs
error handling
2021-10-30 20:06:24 +02:00
Pierre Dubouilh 4d2aee5178 use proper enum return type 2021-10-17 20:49:37 +02:00
Pierre Dubouilh 283653a775 anyhow 2021-10-17 20:08:50 +02:00
Pierre Dubouilh 6741f48285 bubble up parsing errors 2021-10-17 18:59:56 +02:00
16 changed files with 1166 additions and 445 deletions
+24
View File
@@ -0,0 +1,24 @@
name: always
on: [push]
env:
CARGO_TERM_COLOR: always
jobs:
build:
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v4
- name: Format
run: rustup component add rustfmt clippy
- name: Run CI
run: make ci
- name: Install Cross
run: cargo install cross --git https://github.com/cross-rs/cross
- name: Build all artifacts
run: make build-all
+35
View File
@@ -0,0 +1,35 @@
name: deploy
on:
push:
branches:
- main
jobs:
build:
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v4
- name: Format
run: rustup component add rustfmt clippy
- name: Run tests
run: make ci
- name: Install Cross
run: cargo install cross --git https://github.com/cross-rs/cross
- name: Build all artifacts
run: make build-all
- name: "Release gh release latest"
uses: ncipollo/release-action@v1
with:
tag: latest
name: Latest
allowUpdates: true
artifacts: "builds/*"
bodyFile: "builds/buildout"
token: ${{ secrets.GITHUB_TOKEN }}
-20
View File
@@ -1,20 +0,0 @@
name: Rust
on:
push:
branches: [ main ]
pull_request:
branches: [ main ]
env:
CARGO_TERM_COLOR: always
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- name: Run CI
run: make ci
+1
View File
@@ -1 +1,2 @@
/target
builds/**
Generated
+374 -147
View File
@@ -12,30 +12,66 @@ dependencies = [
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@@ -178,10 +243,22 @@ dependencies = [
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
[[package]]
name = "same-file"
@@ -367,79 +424,121 @@ dependencies = [
]
[[package]]
name = "slab"
version = "0.4.4"
name = "serde"
version = "1.0.228"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c307a32c1c5c437f38c7fd45d753050587732ba8628319fbdf12a7e289ccc590"
[[package]]
name = "strsim"
version = "0.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
[[package]]
name = "syn"
version = "1.0.78"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a4eac2e6c19f5c3abc0c229bea31ff0b9b091c7b14990e8924b92902a303a0c0"
checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
dependencies = [
"proc-macro2",
"quote",
"unicode-xid",
"serde_core",
]
[[package]]
name = "textwrap"
version = "0.11.0"
name = "serde_core"
version = "1.0.228"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
dependencies = [
"unicode-width",
"serde_derive",
]
[[package]]
name = "serde_derive"
version = "1.0.228"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
dependencies = [
"proc-macro2",
"quote",
"syn 2.0.96",
]
[[package]]
name = "serde_json"
version = "1.0.150"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e8014e44b4736ed0538adeecded0fce2a272f22dc9578a7eb6b2d9993c74cfb9"
dependencies = [
"itoa",
"memchr",
"serde",
"serde_core",
"zmij",
]
[[package]]
name = "slab"
version = "0.4.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4614a76b2a8be0058caa9dbbaf66d988527d86d003c11a94fbd335d7661edcef"
dependencies = [
"autocfg",
]
[[package]]
name = "strsim"
version = "0.11.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
[[package]]
name = "syn"
version = "1.0.99"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
dependencies = [
"proc-macro2",
"quote",
"unicode-ident",
]
[[package]]
name = "syn"
version = "2.0.96"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
dependencies = [
"proc-macro2",
"quote",
"unicode-ident",
]
[[package]]
name = "tokio"
version = "1.12.0"
version = "1.20.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c2c2416fdedca8443ae44b4527de1ea633af61d8f7169ffa6e72c5b53d24efcc"
checksum = "7a8325f63a7d4774dd041e363b2409ed1c5cbbd0f867795e661df066b2b0a581"
dependencies = [
"autocfg",
"bytes",
"memchr",
"num_cpus",
"pin-project-lite 0.2.7",
"once_cell",
"pin-project-lite",
"tokio-macros",
]
[[package]]
name = "tokio-macros"
version = "1.4.1"
version = "1.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "154794c8f499c2619acd19e839294703e9e32e7630ef5f46ea80d4ef0fbee5eb"
checksum = "9724f9a975fb987ef7a3cd9be0350edcbe130698af5b8f7a631e23d42d052484"
dependencies = [
"proc-macro2",
"quote",
"syn",
"syn 1.0.99",
]
[[package]]
name = "unicode-width"
version = "0.1.9"
name = "unicode-ident"
version = "1.0.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
[[package]]
name = "unicode-xid"
name = "utf8parse"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
[[package]]
name = "vec_map"
version = "0.8.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
[[package]]
name = "walkdir"
@@ -452,6 +551,12 @@ dependencies = [
"winapi-util",
]
[[package]]
name = "wasi"
version = "0.11.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
[[package]]
name = "winapi"
version = "0.3.9"
@@ -482,3 +587,125 @@ name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
[[package]]
name = "windows-sys"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ea04155a16a59f9eab786fe12a4a450e75cdb175f9e0d80da1e17db09f55b8d2"
dependencies = [
"windows_aarch64_msvc 0.36.1",
"windows_i686_gnu 0.36.1",
"windows_i686_msvc 0.36.1",
"windows_x86_64_gnu 0.36.1",
"windows_x86_64_msvc 0.36.1",
]
[[package]]
name = "windows-sys"
version = "0.59.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
dependencies = [
"windows-targets",
]
[[package]]
name = "windows-targets"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
dependencies = [
"windows_aarch64_gnullvm",
"windows_aarch64_msvc 0.52.6",
"windows_i686_gnu 0.52.6",
"windows_i686_gnullvm",
"windows_i686_msvc 0.52.6",
"windows_x86_64_gnu 0.52.6",
"windows_x86_64_gnullvm",
"windows_x86_64_msvc 0.52.6",
]
[[package]]
name = "windows_aarch64_gnullvm"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
[[package]]
name = "windows_aarch64_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9bb8c3fd39ade2d67e9874ac4f3db21f0d710bee00fe7cab16949ec184eeaa47"
[[package]]
name = "windows_aarch64_msvc"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
[[package]]
name = "windows_i686_gnu"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "180e6ccf01daf4c426b846dfc66db1fc518f074baa793aa7d9b9aaeffad6a3b6"
[[package]]
name = "windows_i686_gnu"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
[[package]]
name = "windows_i686_gnullvm"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
[[package]]
name = "windows_i686_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e2e7917148b2812d1eeafaeb22a97e4813dfa60a3f8f78ebe204bcc88f12f024"
[[package]]
name = "windows_i686_msvc"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
[[package]]
name = "windows_x86_64_gnu"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4dcd171b8776c41b97521e5da127a2d86ad280114807d0b2ab1e462bc764d9e1"
[[package]]
name = "windows_x86_64_gnu"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
[[package]]
name = "windows_x86_64_gnullvm"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
[[package]]
name = "windows_x86_64_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
[[package]]
name = "windows_x86_64_msvc"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
[[package]]
name = "zmij"
version = "1.0.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
+4 -2
View File
@@ -1,6 +1,6 @@
[package]
name = "blockfast"
version = "0.1.0"
version = "0.2.0"
authors = ["Pierre Dubouilh <pldubouilh@gmail.com>"]
edition = "2018"
@@ -11,4 +11,6 @@ linemux = "0.2"
tokio = { version = "1", features = ["rt-multi-thread", "macros"] }
lazy_static = "1.4.0"
regex = "1.5.4"
clap = "2.33.3"
anyhow = "1.0.44"
serde_json = "1"
clap = { version = "4.5.27", features = ["derive"] }
+54 -14
View File
@@ -1,23 +1,63 @@
build:
BLOCKFAST_VERS := $(shell git show -s --format=%cd --date=format:%Y-%m-%d HEAD) / $(shell git rev-parse --short HEAD)
export BLOCKFAST_VERS
build::
@echo $(BLOCKFAST_VERS)
cargo build
cargo clippy
cargo fmt
cargo clippy --all
cargo fmt --all
run:
cargo run -- -s=/tmp/sshdtest -c=/tmp/clftest
run::
touch /tmp/clftest
touch /tmp/caddytest
touch /tmp/generictest
cargo build
sudo target/debug/blockfast -v --clf-logpath=/tmp/clftest --caddy-logpath=/tmp/caddytest --generic-logpath=/tmp/generictest --generic-ip='from ([0-9a-fA-F:.]+) port' --generic-positive='Failed password'
watch:
ci:: test
cargo fmt --all -- --check
cargo clippy -- -D warnings
build-all::
mkdir -p builds
cross build --release --target x86_64-unknown-linux-musl
cross build --release --target aarch64-unknown-linux-musl
cross build --release --target armv7-unknown-linux-musleabihf
cp target/x86_64-unknown-linux-musl/release/blockfast builds/blockfast-x86_64-linux
cp target/aarch64-unknown-linux-musl/release/blockfast builds/blockfast-aarch64-linux
cp target/armv7-unknown-linux-musleabihf/release/blockfast builds/blockfast-arm7-linux
chmod +x builds/blockfast-*
echo '```' > builds/buildout
echo $(BLOCKFAST_VERS) >> builds/buildout
rustc --version >> builds/buildout
sha256sum builds/* >> builds/buildout
echo '```' >> builds/buildout
cat builds/buildout
watch::
ls src/*.rs | entr -rc -- make run
test:
test::
cargo test
watch-test:
ls src/*.rs | entr -rc -- make test
release:
release::
cargo build --target x86_64-unknown-linux-musl --release
ci: test
cargo fmt --all -- --check
cargo clippy -- -D warnings
hit-generic::
echo "Sep 26 06:25:19 livecompute sshd[23246]: Failed password for root from 179.124.36.195 port 41883 ssh2" >> /tmp/generictest
ok-generic::
echo "Sep 26 06:25:19 livecompute sshd[23246]: Successful login for root from 179.124.36.195 port 41883 ssh2" >> /tmp/generictest
hit-clf::
echo "1.124.36.195 - p [25/Sep/2021:13:49:56 +0200] \"POST /some/rpc HTTP/2.0\" 401 923" >> /tmp/clftest
ok-clf::
echo "2.124.36.195 - p [25/Sep/2021:13:49:56 +0200] \"POST /some/rpc HTTP/2.0\" 200 23012" >> /tmp/clftest
hit-caddy::
echo "{\"request\":{\"remote_ip\":\"1.124.36.19\"}, \"status\": 400}" >> /tmp/caddytest
ok-caddy::
echo "{\"request\":{\"remote_ip\":\"2.124.36.19\"}, \"status\": 200}" >> /tmp/caddytest
+69 -9
View File
@@ -1,13 +1,73 @@
# blockfast
block ssh and http scanners fast
Block internets scanners fast 🍶
features:
- generic SSH log parser
- generic Common Log Format parser (apache logs, caddy logs, etc...)
- sane defaults
- fast ip ban with `ipset`
- libmusl static release builds, no libc dependency
- lighter alternative to fail2ban
Features:
- Common Log Format parser (apache, nginx logs, etc...)
- Caddy JSON log parser
- Generic log parser
- Sane defaults
- Fast ip ban with `ipset`
- Static release builds, no libc dependency
- Lighter alternative to fail2ban
Todo: more granular CLI args to filter HTTP Status codes (e.g. 5 401 leads to a block, but 30 404 before a block) ?
## example
```txt
$ ./blockfast --caddy-logpath=/caddy/logs
1737927469 - starting with caddy parsing at "/tmp/caddytest"
1737927469 - jail setup, allowance 5, time 21600s
1737927477 - caddy logged offence for 9.124.36.195
1737927478 - caddy logged offence for 9.124.36.195
1737927479 - caddy logged offence for 9.124.36.195
1737927479 - caddy logged offence for 9.124.36.195
1737927480 - caddy logged offence for 9.124.36.195
1737927480 - caddy jailtime for 9.124.36.195
```
## build
see `Makefile`
## usage
```txt
$ target/debug/blockfast
Blockfast - block internets scanners fast 🍶
Author: pierre dubouilh <pldubouilh@gmail.com>
Blockfast reads logs from various sources and blocks the offending IPs using iptables and ipset.
It supports logs in Common-Log-Format (Apache, nginx, etc..), Caddy JSON and a generic logs parser.
Example:
# block invalid http statuses from caddy
./blockfast --caddy-logpath=/caddy/logs
# generic log parser example with a log text to flag, and a regex to parse the offending IP.
./blockfast --generic-logpath=/tmp/generictest --generic-positive='Failed password' --generic-ip='from ([0-9a-fA-F:.]+) port'
Usage: blockfast [OPTIONS]
Options:
--jailtime <JAILTIME>
jail time (seconds) [default: 21600]
--allowance <ALLOWANCE>
how many offences allowed (max 255) [default: 5]
-v, --verbose
log all offences
--clf-logpath <CLF_LOGPATH>
path of Common-Log-Format logfile (Apache, nginx, etc..), can be repeated
--caddy-logpath <CADDY_LOGPATH>
path of Caddy JSON logfile, can be repeated
--generic-logpath <GENERIC_LOGPATH>
generic parser log file path, can be repeated
--generic-ip <GENERIC_IP>
generic parser ip regex
--generic-positive <GENERIC_POSITIVE>
generic parser positive - if a logline contains this, it is considered bad, the rest is good
--generic-negative <GENERIC_NEGATIVE>
generic parser negative - if a logline contains this, it is considered good, the rest is bad
--invalid-http-statuses <INVALID_HTTP_STATUSES>
invalid http statuses (for CLF and Caddy logs). Coma separated list, accepts ranges with XX [default: 400,401,402,403]
-h, --help
Print help
-V, --version
Print version
```
+2
View File
@@ -0,0 +1,2 @@
[toolchain]
channel = "1.95.0"
+75
View File
@@ -0,0 +1,75 @@
use crate::utils::ParsingStatus;
use anyhow::*;
use std::{net::IpAddr, str::FromStr};
pub fn parse(line: &str, invalid_statuses: &[u32]) -> Result<ParsingStatus> {
let json: serde_json::Value = serde_json::from_str(line)?;
let remote_ip = json
.get("request")
.and_then(|r| r.get("remote_ip"))
.and_then(|r| r.as_str())
.and_then(|r| IpAddr::from_str(r).ok())
.ok_or_else(|| anyhow!("cant parse json line - remote_ip"))?;
let status = json
.get("status")
.and_then(|r| r.as_u64())
.ok_or_else(|| anyhow!("cant parse json line - status"))?;
let is_bad_status = invalid_statuses.iter().any(|s| s == &(status as u32));
if is_bad_status {
return Ok(ParsingStatus::BadEntry(remote_ip));
}
Ok(ParsingStatus::OkEntry)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn positive() {
let vectors = [
r#"{"level":"info","ts":1738064403.2176833,"logger":"http.log.access.log0","msg":"handled request","request":{"remote_ip":"127.0.0.1","remote_port":"46884","client_ip":"127.0.0.1","proto":"HTTP/1.1","method":"GET","host":"127.0.0.1:8009","uri":"/","headers":{"User-Agent":["Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0"],"Sec-Fetch-Dest":["document"],"Sec-Fetch-Mode":["navigate"],"Accept-Language":["en-US,en;q=0.5"],"Accept-Encoding":["gzip, deflate, br, zstd"],"Connection":["keep-alive"],"Upgrade-Insecure-Requests":["1"],"Sec-Fetch-Site":["cross-site"],"Priority":["u=0, i"],"Accept":["text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"]}},"bytes_read":0,"user_id":"","duration":0.002135063,"size":35133,"status":429,"resp_headers":{"Vary":["Accept, Accept-Encoding"],"Last-Modified":["Tue, 28 Jan 2025 12:40:02 GMT"],"Content-Type":["text/html; charset=utf-8"],"Server":["Caddy"]}}"#,
r#"{"level":"info","ts":1738064403.2176833,"logger":"http.log.access.log0","msg":"handled request","request":{"remote_ip":"127.0.0.1","remote_port":"46884","client_ip":"127.0.0.1","proto":"HTTP/1.1","method":"GET","host":"127.0.0.1:8009","uri":"/","headers":{"User-Agent":["Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0"],"Sec-Fetch-Dest":["document"],"Sec-Fetch-Mode":["navigate"],"Accept-Language":["en-US,en;q=0.5"],"Accept-Encoding":["gzip, deflate, br, zstd"],"Connection":["keep-alive"],"Upgrade-Insecure-Requests":["1"],"Sec-Fetch-Site":["cross-site"],"Priority":["u=0, i"],"Accept":["text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"]}},"bytes_read":0,"user_id":"","duration":0.002135063,"size":35133,"status":401,"resp_headers":{"Vary":["Accept, Accept-Encoding"],"Last-Modified":["Tue, 28 Jan 2025 12:40:02 GMT"],"Content-Type":["text/html; charset=utf-8"],"Server":["Caddy"]}}"#,
];
vectors.iter().for_each(|e| {
let ret = parse(*e, &vec![429, 401]).unwrap();
match ret {
ParsingStatus::BadEntry(_) => {}
_ => panic!("bad parsing"),
}
})
}
#[test]
fn negative() {
let vectors = [
r#"{"level":"info","ts":1738064403.2176833,"logger":"http.log.access.log0","msg":"handled request","request":{"remote_ip":"127.0.0.1","remote_port":"46884","client_ip":"127.0.0.1","proto":"HTTP/1.1","method":"GET","host":"127.0.0.1:8009","uri":"/","headers":{"User-Agent":["Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0"],"Sec-Fetch-Dest":["document"],"Sec-Fetch-Mode":["navigate"],"Accept-Language":["en-US,en;q=0.5"],"Accept-Encoding":["gzip, deflate, br, zstd"],"Connection":["keep-alive"],"Upgrade-Insecure-Requests":["1"],"Sec-Fetch-Site":["cross-site"],"Priority":["u=0, i"],"Accept":["text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"]}},"bytes_read":0,"user_id":"","duration":0.002135063,"size":35133,"status":200,"resp_headers":{"Vary":["Accept, Accept-Encoding"],"Last-Modified":["Tue, 28 Jan 2025 12:40:02 GMT"],"Content-Type":["text/html; charset=utf-8"],"Server":["Caddy"]}}"#,
r#"{"level":"info","ts":1738064403.2176833,"logger":"http.log.access.log0","msg":"handled request","request":{"remote_ip":"127.0.0.1","remote_port":"46884","client_ip":"127.0.0.1","proto":"HTTP/1.1","method":"GET","host":"127.0.0.1:8009","uri":"/","headers":{"User-Agent":["Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0"],"Sec-Fetch-Dest":["document"],"Sec-Fetch-Mode":["navigate"],"Accept-Language":["en-US,en;q=0.5"],"Accept-Encoding":["gzip, deflate, br, zstd"],"Connection":["keep-alive"],"Upgrade-Insecure-Requests":["1"],"Sec-Fetch-Site":["cross-site"],"Priority":["u=0, i"],"Accept":["text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"]}},"bytes_read":0,"user_id":"","duration":0.002135063,"size":35133,"status":404,"resp_headers":{"Vary":["Accept, Accept-Encoding"],"Last-Modified":["Tue, 28 Jan 2025 12:40:02 GMT"],"Content-Type":["text/html; charset=utf-8"],"Server":["Caddy"]}}"#,
];
vectors.iter().for_each(|e| {
let ret = parse(*e, &vec![429, 401]).unwrap();
match ret {
ParsingStatus::OkEntry => {}
_ => panic!("bad parsing"),
}
})
}
#[test]
fn malformed() {
let vectors = [
r#"{"level":"info","ts":1738064403.2176833,"logger":"http.log.access.log0","msg":"handled request","requeto":"HTTP/1 x86_64; rv:133.0)"],"Server":["Caddy"]}}"#,
];
vectors.iter().for_each(|e| {
let ret = parse(*e, &vec![429, 401]);
assert!(ret.is_err());
})
}
}
+103 -21
View File
@@ -1,28 +1,41 @@
use std::net::IpAddr;
use crate::utils::ParsingStatus;
use anyhow::*;
use lazy_static::lazy_static;
use regex::Regex;
use std::{net::IpAddr, str::FromStr};
// TODO: allow user-provided list
// TODO: match different error-levels (10 404, but only 5 401, etc...)
lazy_static! {
static ref BAD_STATUSES: [&'static str; 2] = ["401", "429"];
// anchored on the left side of the line: host, ident, authuser, [date],
// the quoted request (honouring backslash escapes, so a quote injected in
// the URL cannot shift the match), then the status right after it. this
// covers plain CLF and the combined format - the trailing attacker
// controlled "referer" "user-agent" fields are never scanned
static ref RE_CLF: Regex =
Regex::new(r#"^(\S+)\s+\S+\s+\S+\s+\[[^\]]*\]\s+"(?:[^"\\]|\\.)*"\s+(\d{3})(?:\s|$)"#)
.unwrap();
}
pub fn parse(line: &str) -> Option<IpAddr> {
// TODO: Use a proper parser ?
let elts: Vec<&str> = line.split_whitespace().collect();
let ip = elts[0].parse::<IpAddr>().ok();
let http_code = elts[elts.len() - 2] as &str;
pub fn parse(line: &str, invalid_statuses: &[u32]) -> Result<ParsingStatus> {
let caps = RE_CLF
.captures(line)
.ok_or_else(|| anyhow!("cant parse clf line"))?;
BAD_STATUSES.iter().find_map(
|bad_status| {
if http_code == *bad_status {
ip
} else {
None
}
},
)
let ip = caps
.get(1)
.and_then(|g| IpAddr::from_str(g.as_str()).ok())
.ok_or_else(|| anyhow!("cant parse clf line - ip"))?;
let status = caps
.get(2)
.and_then(|g| g.as_str().parse::<u32>().ok())
.ok_or_else(|| anyhow!("cant parse clf line - status"))?;
let is_bad_status = invalid_statuses.iter().any(|s| s == &status);
if is_bad_status {
return Ok(ParsingStatus::BadEntry(ip));
}
Ok(ParsingStatus::OkEntry)
}
#[cfg(test)]
@@ -36,7 +49,13 @@ mod tests {
"8.8.8.8 - p [25/Sep/2021:13:49:56 +0200] \"POST /some/rpc HTTP/2.0\" 429 923",
];
vectors.iter().for_each(|e| assert!(parse(*e).is_some()))
vectors.iter().for_each(|e| {
let ret = parse(*e, &vec![401, 429]).unwrap();
match ret {
ParsingStatus::BadEntry(_) => {}
_ => panic!("bad parsing"),
}
})
}
#[test]
@@ -46,6 +65,69 @@ mod tests {
"8.8.8.8 - p [25/Sep/2021:13:49:56 +0200] \"POST /some/rpc HTTP/2.0\" 404 923",
];
vectors.iter().for_each(|e| assert!(parse(*e).is_none()))
vectors.iter().for_each(|e| {
let ret = parse(*e, &vec![401, 429]).unwrap();
match ret {
ParsingStatus::OkEntry => {}
_ => panic!("bad parsing"),
}
})
}
#[test]
fn combined_format() {
// combined log format appends "referer" "user-agent" - the old parser
// read digits out of the user-agent as the status and silently missed these
let bad = r#"8.8.8.8 - - [25/Sep/2021:13:49:56 +0200] "GET /admin HTTP/1.1" 401 923 "https://example.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0""#;
match parse(bad, &vec![401, 429]).unwrap() {
ParsingStatus::BadEntry(_) => {}
_ => panic!("bad parsing"),
}
let ok = r#"8.8.8.8 - - [25/Sep/2021:13:49:56 +0200] "GET / HTTP/1.1" 200 923 "https://example.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0""#;
match parse(ok, &vec![401, 429]).unwrap() {
ParsingStatus::OkEntry => {}
_ => panic!("bad parsing"),
}
}
#[test]
fn quote_injection() {
// servers escape quotes in the logged request - an escaped `\" 401 `
// inside the URL must not be mistaken for the end of the request field
let ok = r#"8.8.8.8 - - [25/Sep/2021:13:49:56 +0200] "GET /x?a=\" 401 - HTTP/1.1" 200 923"#;
match parse(ok, &vec![401, 429]).unwrap() {
ParsingStatus::OkEntry => {}
_ => panic!("bad parsing"),
}
}
#[test]
fn bodyless() {
// CLF uses `-` for absent body bytes, both branches must still parse
let bad = "8.8.8.8 - p [25/Sep/2021:13:49:56 +0200] \"GET / HTTP/2.0\" 401 -";
match parse(bad, &vec![401, 429]).unwrap() {
ParsingStatus::BadEntry(_) => {}
_ => panic!("bad parsing"),
}
let ok = "8.8.8.8 - p [25/Sep/2021:13:49:56 +0200] \"GET / HTTP/2.0\" 304 -";
match parse(ok, &vec![401, 429]).unwrap() {
ParsingStatus::OkEntry => {}
_ => panic!("bad parsing"),
}
}
#[test]
fn malformed() {
let vectors = [
"8.8.8.8.8 - p [25/Sep/2021:13:49:56 +0200] \"POST /some/rpc HTTP/2.0\" 200 923",
"8.8.8.8 - p [25/Sep/2021:13:49:56 +0200] \"POST /some/rpc HTTP/2.0\"",
];
vectors.iter().for_each(|e| {
let ret = parse(*e, &vec![429, 401]);
assert!(ret.is_err());
})
}
}
+83
View File
@@ -0,0 +1,83 @@
use crate::utils::ParsingStatus;
use anyhow::*;
use regex::Regex;
use std::{net::IpAddr, str::FromStr};
#[allow(clippy::bind_instead_of_map)]
pub fn parse(
line: &str,
ip: Option<&Regex>,
positive: Option<&String>,
negative: Option<&String>,
) -> Result<ParsingStatus> {
if let Some(ne) = negative {
if line.contains(ne) {
return Ok(ParsingStatus::OkEntry);
}
}
if let Some(po) = positive {
if !line.contains(po) {
return Ok(ParsingStatus::OkEntry);
}
}
let ip = ip.unwrap().captures(line);
let ip = ip
.and_then(|c| c.get(1))
.and_then(|g| Some(g.as_str()))
.and_then(|e| IpAddr::from_str(e).ok())
.ok_or_else(|| anyhow!("cant parse clf line - ip"))?;
Ok(ParsingStatus::BadEntry(ip))
}
#[cfg(test)]
mod tests {
use super::*;
const FAILED: &str =
"Sep 26 06:25:19 livecompute sshd[23246]: Failed password for root from 179.124.36.195 port 41883 ssh2";
const SUCCESS: &str =
"Sep 26 06:25:19 livecompute sshd[23246]: Successful login for root from 179.124.36.195 port 41883 ssh2";
// generic log positive regex - what's that's flagged by this is considered bad, the rest is good
#[test]
fn positive() {
let positive = "Failed password".to_string();
let ip = Regex::new(r"from ([0-9a-fA-F:.]+) port").unwrap();
let ret = parse(FAILED, Some(&ip), Some(&positive), None).unwrap();
match ret {
ParsingStatus::BadEntry(_) => {}
_ => panic!("bad parsing"),
}
let ret = parse(SUCCESS, Some(&ip), Some(&positive), None).unwrap();
match ret {
ParsingStatus::OkEntry => {}
_ => panic!("bad parsing"),
}
}
// generic log negative regex - what's that's flagged by this is considered good, the rest is bad
#[test]
fn negative() {
let negative = "Successful login".to_string();
let ip = Regex::new(r"from ([0-9a-fA-F:.]+) port").unwrap();
let ret = parse(SUCCESS, Some(&ip), None, Some(&negative)).unwrap();
match ret {
ParsingStatus::OkEntry => {}
_ => panic!("bad parsing"),
}
let ret = parse(FAILED, Some(&ip), None, Some(&negative)).unwrap();
match ret {
ParsingStatus::BadEntry(_) => {}
_ => panic!("bad parsing"),
}
}
}
+69 -89
View File
@@ -1,127 +1,107 @@
use std::collections::HashMap;
use std::net::IpAddr;
use std::panic::panic_any;
use std::process::Command;
use std::result::Result::Ok;
use std::sync::Mutex;
use anyhow::*;
use crate::utils::{get_epoch, log};
pub struct Jail {
jailtime: u32,
name: String,
allowance: u8,
remand: Mutex<HashMap<IpAddr, u8>>,
jailtime: u32,
remand: Mutex<HashMap<IpAddr, (u8, u64)>>, // ip -> (hits, timestamp)
}
const JAIL_NAME: &str = "blockfast_jail";
const GENERAL_PANIC_MSG: &str =
"error using ipset/iptables, maybe it's not installed, this program isn't running as root ?";
fn exec(program: &str, cmd: &str, err: &str) -> Result<(), Error> {
let sentence_sl: Vec<&str> = cmd.split_whitespace().collect();
let out = Command::new(program).args(sentence_sl).output()?;
let sc = out.status.code();
ensure!(sc == Some(0), "err exec {}, {:?}\n{}", cmd, out, err);
Ok(())
}
fn ipset_init() -> Option<()> {
let init0 = format!("ipset create {} hash:ip timeout 0", JAIL_NAME);
let init1 = format!(
"iptables -I INPUT 1 -m set -j DROP --match-set {} src",
JAIL_NAME
);
let init2 = format!(
"iptables -I FORWARD 1 -m set -j DROP --match-set {} src",
JAIL_NAME
);
let args0: Vec<&str> = init0.split_whitespace().collect();
let args1: Vec<&str> = init1.split_whitespace().collect();
let args2: Vec<&str> = init2.split_whitespace().collect();
// create
let out = Command::new("sudo").args(args0).output().ok()?;
if out.status.code()? != 0 {
let already_exists = std::str::from_utf8(&out.stderr)
.ok()?
.contains("set with the same name already exists");
if already_exists {
return None;
} else {
eprintln!("{:?}", out);
panic_any(GENERAL_PANIC_MSG);
fn check_installed(program: &str) -> Result<()> {
match Command::new(program).arg("--version").output() {
Ok(_) => Ok(()),
Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
bail!("`{}` not found, please install it first", program)
}
Err(e) => Err(e).context(format!("cant execute `{}`", program)),
}
// setup input
let out_input = Command::new("sudo").args(args1).output().ok()?;
if out_input.status.code()? != 0 {
eprintln!("{:?}", out_input);
panic_any(GENERAL_PANIC_MSG);
}
// setup fwd
let out_fwd = Command::new("sudo").args(args2).output().ok()?;
if out_fwd.status.code()? != 0 {
eprintln!("{:?}", out_fwd);
panic_any(GENERAL_PANIC_MSG);
}
None
}
fn ipset_block(jailtime: u32, ip: IpAddr) -> Option<()> {
let sentence = format!(
"ipset add {} {} timeout {}",
JAIL_NAME,
ip.to_string(),
jailtime
);
let sentence_sl: Vec<&str> = sentence.split_whitespace().collect();
let out = Command::new("sudo").args(sentence_sl).output().ok()?;
if out.status.code()? != 0 {
return None;
}
Some(())
fn exec_ok(program: &str, cmd: &str) -> Result<bool> {
let parts: Vec<&str> = cmd.split_whitespace().collect();
let out = Command::new(program).args(parts).output()?;
Ok(out.status.code() == Some(0))
}
impl Jail {
pub fn new(allowance: u8, jailtime: u32) -> Jail {
if ipset_init().is_some() {
panic_any(GENERAL_PANIC_MSG);
};
pub fn new(allowance: u8, jailtime: u32) -> Result<Jail> {
const ERR_MSG: &str =
"error using ipset/iptables, maybe this program isn't running as root ?";
check_installed("ipset")?;
check_installed("iptables")?;
let n = format!("blockfast_jail_{}", jailtime);
eprintln!(
"+ jail setup, allowing {} offences, jailtime: {}s",
allowance, jailtime
);
// create
let cmd = format!("create -exist {} hash:ip timeout {}", n, jailtime);
exec("ipset", &cmd, ERR_MSG)?;
Jail {
// install drop rule on INPUT and FORWARD, but only if not already present
let rule_spec = format!("-m set -j DROP --match-set {} src", n);
for chain in &["INPUT", "FORWARD"] {
let check = format!("-C {} {}", chain, rule_spec);
if !exec_ok("iptables", &check)? {
let install = format!("-I {} 1 {}", chain, rule_spec);
exec("iptables", &install, ERR_MSG)?;
}
}
log!("jail setup, allowance {}, time {}s", allowance, jailtime);
Ok(Jail {
name: n,
allowance,
jailtime,
remand: Mutex::new(HashMap::new()),
}
})
}
pub fn probe(&self, ip: IpAddr) -> Option<()> {
pub fn sentence(&self, ip: IpAddr) -> Result<bool> {
let now = get_epoch();
let should_ban = {
let mut locked_map = self.remand.lock().ok()?;
// TODO: set time of last offence, and add grace
let hits = *locked_map.entry(ip).and_modify(|e| *e += 1).or_insert(1);
let mut locked_map = self.remand.lock().map_err(|_| anyhow!("cant lock"))?;
let (hits, _ts) = *locked_map
.entry(ip)
.and_modify(|(hits, ts)| {
if now > *ts + self.jailtime as u64 {
// reset if we have a hit, but past the defined jailtime
*ts = now;
*hits = 1;
} else {
*hits += 1; // bump
}
})
.or_insert((1, now));
if hits < self.allowance {
false
} else {
locked_map.remove_entry(&ip); // preserve space
locked_map.remove_entry(&ip);
true
}
};
if should_ban {
match ipset_block(self.jailtime, ip) {
Some(_) => eprintln!("~ {} going to jail", ip),
None => eprintln!("! ERR {} going to jail", ip),
}
let cmd = format!("add -exist {} {}", self.name, ip);
exec("ipset", &cmd, "")?;
return Ok(true);
}
None
Ok(false)
}
}
+84 -35
View File
@@ -1,57 +1,106 @@
use linemux::MuxedLines;
use std::result::Result::Ok;
use anyhow::*;
use clap::Parser;
use linemux::{Line, MuxedLines};
mod caddy;
mod clf;
mod sshd;
mod generic;
mod utils;
mod jail;
use crate::jail::Jail;
use crate::utils::*;
async fn run() -> Option<()> {
let args = utils::cli().get_matches();
let mut lines = MuxedLines::new().ok()?;
async fn run() -> Result<()> {
let args = utils::Args::parse();
let mut ml = MuxedLines::new()?;
// jail
let jailtime: u32 = args.value_of("jailtime")?.parse().ok()?;
let allowance: u8 = args.value_of("allowance")?.parse().ok()?;
let jail = Jail::new(allowance, jailtime);
// HTTP statuses
let invalid_statuses = args.invalid_http_statuses.clone();
let invalid_statuses_parsed = parse_statuses(&invalid_statuses)?;
let invalid_statuses_ref = invalid_statuses_parsed.as_ref();
// sshd
let path_sshd = args.value_of("sshd_logpath").unwrap_or("");
let do_sshd = !path_sshd.is_empty();
if do_sshd {
lines.add_file(path_sshd).await.ok()?;
eprintln!("+ starting with sshd parsing at {}", path_sshd);
// generic parser
let generic_paths = &args.generic_logpath;
let generic_ip_re = args.generic_ip.as_ref();
let generic_positive = args.generic_positive.as_ref();
let generic_negative = args.generic_negative.as_ref();
for p in generic_paths {
ml.add_file(&p).await?;
log!("starting with generic parsing at {:?}", &p);
}
// common log format
let path_clf = args.value_of("clf_logpath").unwrap_or("");
let do_clf = !path_clf.is_empty();
if do_clf {
lines.add_file(path_clf).await.ok()?;
eprintln!("+ starting with clf parsing at {}", path_clf);
let clf_logpaths = &args.clf_logpath;
for p in clf_logpaths {
ml.add_file(&p).await?;
log!("starting with clf parsing at {:?}", &p);
}
while let Ok(Some(line)) = lines.next_line().await {
let payload = line.line();
let path = line.source().display().to_string();
// caddy json
let caddy_logpaths = &args.caddy_logpath;
for p in caddy_logpaths {
ml.add_file(&p).await?;
log!("starting with caddy parsing at {:?}", &p);
}
if do_sshd && path.ends_with(path_sshd) {
sshd::parse(payload).and_then(|ip| jail.probe(ip));
} else if do_clf && path.ends_with(path_clf) {
clf::parse(payload).and_then(|ip| jail.probe(ip));
if caddy_logpaths.is_empty() && clf_logpaths.is_empty() && generic_paths.is_empty() {
bail!("no log files to parse, see --help");
}
// jail
let jail = Jail::new(args.allowance, args.jailtime)?;
let assess_line = |line: Line| {
let payload = line.line();
let path_buf = Some(line.source().to_path_buf());
let path = path_buf.as_ref();
let (target, ret) = if path.is_some_and(|p| clf_logpaths.contains(p)) {
("clf", clf::parse(payload, invalid_statuses_ref)?)
} else if path.is_some_and(|p| caddy_logpaths.contains(p)) {
("caddy", caddy::parse(payload, invalid_statuses_ref)?)
} else if path.is_some_and(|p| generic_paths.contains(p)) {
(
"generic",
generic::parse(payload, generic_ip_re, generic_positive, generic_negative)?,
)
} else {
eprintln!("! unknown logline: {}", path);
bail!("file {:?} unknown ?", path)
};
if let ParsingStatus::BadEntry(ip) = ret {
if args.verbose {
log!("{} logged offence for {}", target, ip);
}
let banned = jail.sentence(ip)?;
if banned {
log!("{} jailtime for {}", target, ip);
}
}
Ok(())
};
loop {
match ml.next_line().await {
Ok(Some(line)) => {
if let Err(e) = assess_line(line) {
log!("ERR: {:?}", e);
}
}
Ok(None) => {
log!("log stream ended, exiting");
return Ok(());
}
Err(e) => return Err(e.into()),
}
}
Some(())
}
#[tokio::main]
async fn main() -> std::io::Result<()> {
let _ = run().await;
eprintln!("! ERR");
let _ = utils::cli().print_help();
Ok(())
async fn main() -> Result<()> {
run().await
}
-65
View File
@@ -1,65 +0,0 @@
use std::net::IpAddr;
use lazy_static::lazy_static;
use regex::Regex;
struct Rule {
matcher: String,
extractor: Regex,
}
lazy_static! {
static ref SSHD_BAD: [Rule; 3] = [
Rule {
matcher: "Failed password".to_string(),
extractor: Regex::new(r"(from.)(.*)(.port)").unwrap(),
},
Rule {
matcher: "Invalid user".to_string(),
extractor: Regex::new(r"(from.)(.*)").unwrap(),
},
Rule {
matcher: "authentication failure".to_string(),
extractor: Regex::new(r"(rhost=)(.*)").unwrap()
},
];
}
pub fn parse(line: &str) -> Option<IpAddr> {
let ret = SSHD_BAD.iter().find_map(|rule| {
if line.contains(&rule.matcher) {
rule.extractor.captures(line)?.get(2)
} else {
None
}
})?;
ret.as_str().parse::<IpAddr>().ok()
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn positive() {
let vectors = [
"Sep 26 06:25:19 livecompute sshd[23246]: Failed password for root from 179.124.36.195 port 41883 ssh2",
"Sep 26 06:26:14 livecompute sshd[23292]: pam_unix(sshd:auth): authentication failure; logname= u =0 tty=ssh ruser= rhost=5.101.107.190",
"Sep 26 06:25:32 livecompute sshd[23254]: Invalid user neal from 35.184.211.144"
];
vectors.iter().for_each(|e| assert!(parse(*e).is_some()))
}
#[test]
fn negative() {
let vectors = [
"Sep 26 06:25:19 livecompute sshd[23246]: successful login 179.124.36.195 port 41883 ssh2",
"Sep 26 06:26:14 livecompute sshd[23292]: pam_unix(sshd:auth): authentication total success; logname= u =0 tty=ssh ruser= rhost=5.101.107.190",
"Sep 26 06:25:32 livecompute sshd[23254]: very good user neal from 35.184.211.144"
];
vectors.iter().for_each(|e| assert!(parse(*e).is_none()))
}
}
+189 -43
View File
@@ -1,45 +1,191 @@
use clap::{App, Arg};
use anyhow::{anyhow, bail, Context, Result};
use clap::{ArgGroup, Parser};
use regex::Regex;
use std::{
net::IpAddr,
path::{Path, PathBuf},
};
pub fn cli() -> App<'static, 'static> {
App::new("ban internets scanner fast 🍶")
.version("v0.0.1")
.author("pierre dubouilh <pldubouilh@gmail.com>")
// .arg(Arg::with_name("prune")
// .short("prune")
// .help("prune current logfiles to prefill banlist")
// .default_value("false")
// .takes_value(true))
.arg(
Arg::with_name("jailtime")
.short("j")
.help("jail time (seconds)")
.default_value("3600")
.takes_value(true),
)
.arg(
Arg::with_name("allowance")
.short("a")
.help("how many offences allowed (max 255")
.default_value("5")
.takes_value(true),
)
.arg(
Arg::with_name("sshd_logpath")
.short("sshd_logpath")
.help("path of sshd logfile (disable with empty path)")
.default_value("/var/log/auth.log")
.takes_value(true),
)
.arg(
Arg::with_name("clf_logpath")
.short("clf_logpath")
.help("path of Common-Log-Format (Apache, etc..) logfile")
.default_value("")
.takes_value(true),
)
// .arg(Arg::with_name("clf_bad_http_codes")
// .short("cb")
// .help("bad CLF http codes")
// .default_value("{401, 429}")
// .takes_value(true))
#[derive(Debug)]
pub enum ParsingStatus {
OkEntry,
BadEntry(IpAddr),
}
pub fn get_epoch() -> u64 {
let e = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH);
e.map(|e| e.as_secs()).unwrap_or(0)
}
macro_rules! log{
($first:expr) => {
let ts = crate::utils::get_epoch();
eprintln!("{} - {}", ts, $first);
};
($first:expr, $($others:expr),+) => {
let ts = crate::utils::get_epoch();
let formatted = format!($first, $($others), *);
eprintln!("{} - {}", ts, formatted);
};
}
pub fn resolve_path(a: &str) -> Result<PathBuf> {
let p = Path::new(a);
if !p.exists() {
return Err(anyhow!("path {:?} does not exist", p));
}
let p = std::fs::canonicalize(p)?;
Ok(p)
}
pub fn parse_regex(a: &str) -> Result<Regex> {
let r: Regex = Regex::new(a).context("invalid regexp for generic parser")?;
Ok(r)
}
/// Parse a comma-separated list of HTTP statuses with trailing-`x` wildcards.
///
/// Accepted forms per token: `NNN` (literal), `NNx` (10-wide range), `Nxx` (100-wide range).
/// All expanded codes must fall in the valid HTTP range 100..=599.
pub fn parse_statuses(a: &str) -> Result<Vec<u32>> {
if a.trim().is_empty() {
bail!("invalid_http_statuses: empty input");
}
let mut statuses = vec![];
for raw in a.split(',') {
let s = raw.trim();
let xs = s.chars().rev().take_while(|c| *c == 'x').count();
let digits = &s[..s.len() - xs];
if digits.is_empty() || !digits.chars().all(|c| c.is_ascii_digit()) {
bail!("invalid http status `{}`", s);
}
let base: u32 = digits.parse().context("invalid status")?;
let span = 10u32.pow(xs as u32);
let from = base * span;
for code in from..(from + span) {
if !(100..=599).contains(&code) {
bail!("status {} out of valid HTTP range (100..=599)", code);
}
statuses.push(code);
}
}
Ok(statuses)
}
pub(crate) use log;
#[derive(Parser, Debug)]
#[command(
name = "Blockfast",
author = "pierre dubouilh <pldubouilh@gmail.com>",
arg_required_else_help = true,
version = option_env!("BLOCKFAST_VERS").unwrap_or("unknown"),
long_about = None,
about = "
Blockfast - block internets scanners fast 🍶
Author: pierre dubouilh <pldubouilh@gmail.com>
Blockfast reads logs from various sources and blocks the offending IPs using iptables and ipset.
It supports logs in Common-Log-Format (Apache, nginx, etc..), Caddy JSON and a generic logs parser.
Example:
# block invalid http statuses from caddy
./blockfast --caddy-logpath=/caddy/logs
# generic log parser example with a log text to flag, and a regex to parse the offending IP.
./blockfast --generic-logpath=/tmp/generictest --generic-positive='Failed password' --generic-ip='from ([0-9a-fA-F:.]+) port'",
verbatim_doc_comment,
group(ArgGroup::new("generic_match").args(["generic_positive", "generic_negative"])),
)]
pub struct Args {
/// jail time (seconds)
#[clap(long, default_value = "21600")]
pub jailtime: u32,
/// how many offences allowed (max 255)
#[clap(long, default_value = "5")]
pub allowance: u8,
/// log all offences
#[clap(short, long)]
pub verbose: bool,
/// path of Common-Log-Format logfile (Apache, nginx, etc..), can be repeated
#[clap(long, value_parser = resolve_path)]
pub clf_logpath: Vec<PathBuf>,
/// path of Caddy JSON logfile, can be repeated
#[clap(long, value_parser = resolve_path)]
pub caddy_logpath: Vec<PathBuf>,
/// generic parser log file path, can be repeated
#[clap(long, value_parser = resolve_path, requires_all = ["generic_ip", "generic_match"])]
pub generic_logpath: Vec<PathBuf>,
/// generic parser ip regex
#[clap(long, value_parser = parse_regex, requires = "generic_logpath")]
pub generic_ip: Option<Regex>,
/// generic parser positive - if a logline contains this, it is considered bad, the rest is good
#[clap(long, requires = "generic_logpath")]
pub generic_positive: Option<String>,
/// generic parser negative - if a logline contains this, it is considered good, the rest is bad
#[clap(long, requires = "generic_logpath")]
pub generic_negative: Option<String>,
/// invalid http statuses (for CLF and Caddy logs). Coma separated list, accepts ranges with XX.
#[clap(long, default_value = "400,401,402,403")]
pub invalid_http_statuses: String,
}
#[cfg(test)]
mod tests {
use super::parse_statuses;
#[test]
fn literal() {
assert_eq!(parse_statuses("401").unwrap(), vec![401]);
assert_eq!(parse_statuses("401,404,429").unwrap(), vec![401, 404, 429]);
}
#[test]
fn ten_range() {
assert_eq!(
parse_statuses("40x").unwrap(),
(400..410).collect::<Vec<_>>()
);
}
#[test]
fn hundred_range() {
assert_eq!(
parse_statuses("4xx").unwrap(),
(400..500).collect::<Vec<_>>()
);
}
#[test]
fn mixed() {
let got = parse_statuses("401, 40x, 5xx").unwrap();
assert_eq!(got.len(), 1 + 10 + 100);
assert_eq!(got[0], 401);
assert!(got.contains(&500));
assert!(got.contains(&599));
}
#[test]
fn rejects_out_of_range() {
// 5x → 50..60, none of which are valid HTTP
assert!(parse_statuses("5x").is_err());
}
#[test]
fn rejects_garbage() {
assert!(parse_statuses("").is_err());
assert!(parse_statuses("xxx").is_err());
assert!(parse_statuses("1x2").is_err());
assert!(parse_statuses("abc").is_err());
assert!(parse_statuses("401,,402").is_err());
}
}