Use this quick workaround:
sudo sed -i "s/SYSLOG_FACILITY=4 SYSLOG_FACILITY=10/-t sshd/"
/etc/sshguard/sshguard.conf
sudo systemctl restart sshguard
Can add more services (-t <service>) as needed.
Note: SSHGuard can parse the following services (see
src/common/attack.h):
enum service {
SERVICES_ALL = 0, //< anything
SERVICES_SSH = 100, //< ssh
SERVICES_SSHGUARD = 110, //< SSHGuard
SERVICES_UWIMAP = 200, //< UWimap for imap and pop daemon
SERVICES_DOVECOT = 210, //< dovecot
SERVICES_CYRUSIMAP = 220, //< cyrus-imap
SERVICES_CUCIPOP = 230, //< cucipop
SERVICES_EXIM = 240, //< exim
SERVICES_SENDMAIL = 250, //< sendmail
SERVICES_POSTFIX = 260, //< postfix
SERVICES_OPENSMTPD = 270, //< OpenSMTPD
SERVICES_COURIER = 280, //< Courier IMAP/POP
SERVICES_FREEBSDFTPD = 300, //< ftpd shipped with FreeBSD
SERVICES_PROFTPD = 310, //< ProFTPd
SERVICES_PUREFTPD = 320, //< Pure-FTPd
SERVICES_VSFTPD = 330, //< vsftpd
SERVICES_COCKPIT = 340, //< cockpit management dashboard
SERVICES_CLF_UNAUTH = 350, //< HTTP 401 in common log format
SERVICES_CLF_PROBES = 360, //< probes for common web services
SERVICES_CLF_LOGIN_URL = 370, //< CMS framework logins in common log
format
SERVICES_OPENVPN = 400, //< OpenVPN
SERVICES_OPENVPN_PS = 410, //< OpenVPN Portshare
SERVICES_GITEA = 500, //< Gitea
};
A quick look at the source reveals that SSHGuard has a parser for its
own logs, which seems to be to support remote sshguard logging scenario.
There does not seem to be a way to configure SSHGuard actions per-
service, and it is always logging using LOG_AUTH facility (4). Which
means SYSLOG_FACILITY=4 can never be used as a filter currently, the
only solution is to filter the logs *before* they reach SSHGuard.
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https://bugs.launchpad.net/bugs/1881459
Title:
sshguard triggers on its own log messages
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