Block all brute force attacks in realtime (IPv4/SSH)

inotifywait -r -q --format %w /var/log/auth.log|grep -i "Failed pass"|tail -n 1|grep -oE '\b([0-9]{1,3}\.){3}[0-9]{1,3}';iptables -I INPUT -i eth0 -s "$(cat /var/log/auth.log|grep "authentication failure; l"|awk -Frhost= '{print $2}'|tail -n 1)" -j DROP
Was to long with a loop, use a while loop for have it running 24/7

0
By: wuziduzi
2019-07-28 18:42:23

What Others Think

This is what happens on my machine ... >> root > inotifywait -r -q --format %w /var/log/auth.log|grep -i "Failed pass"|tail -n 1|grep -oE '\b([0-9]{1,3}\.){3}[0-9]{1,3}';iptables -I INPUT -i eth0 -s "$(cat /var/log/auth.log|grep "authentication failure; l"|awk -Frhost= '{print $2}'|tail -n 1)" -j DROP iptables v1.6.0: host/network `user=XXXXXX' not found Try `iptables -h' or 'iptables --help' for more information. Probably, what is happening here, is that I do not have iptables properly configured right now. Either that, or the auth.log info is different on my distro. OR, finally, that the cmd line here needs to be modified. Occam's razor and the Axiom of Choice. :) Oh this is fun for a non-hangover Saturday morning post-coffee chase!
LyscmdFUer · 7 weeks ago

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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