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yukoff/crowdsec-process-sshd-log

Created April 14, 2024 15:45
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Example script to process sshd auth errors retroactively and add CrowdSec decisions
Raw
crowdsec-process-sshd-log
#!/usr/bin/env bash
# log could be /var/log/secure or /var/log/auth.log
zgrep -P 'Invalid user .+? from |Failed password for .+? from ' /var/log/auth.log* \
| grep -Pv $WHITELISTIPS \
| perl -p -e 's/.+? from (\d+\.\d+\.\d+\.\d+) port .+/\1/g' \
| sort -u \
| xargs -I % sudo cscli decisions add --ip % --duration 48h --reason "ssh bruteforce"
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