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[docs] add fail2ban regex in the doc (#2189)

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OniriCorpe 2023-09-11 09:43:31 +02:00 committed by GitHub
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docs/advanced/security/firewall.md
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@ -82,3 +82,9 @@ Both SSHGuard and fail2ban ship with "backends" that can target iptables and nft
* [ArchWiki](https://wiki.archlinux.org/title/sshguard) on sshguard
* [FreeBSD manual](https://man.freebsd.org/cgi/man.cgi?query=sshguard&sektion=8&manpath=FreeBSD+13.2-RELEASE+and+Ports) for sshguard
* [SSHGuard setup](https://manpages.ubuntu.com/manpages/lunar/en/man7/sshguard-setup.7.html) manual for Ubuntu
For fail2ban, you can use the following regex, which triggers fail2ban on failed logins and not another 'Unauthorized' errors (API for example):
```regex
statusCode=401 path=/auth/sign_in clientIP=<HOST> .* msg=\"Unauthorized:
```