Hi Robert, On 07/18/2017 10:15 PM, mj wrote:
Robert, your iptables suggestions are _very_ interesting! However, will they also work on imaps/993, because of the ssl?
I have adjusted and put into place your iptables suggestion like this:
iptables -I INPUT -p tcp --dport 143 -m string --algo bm --string '1q2w3e4r' -j DROP iptables -I INPUT -p tcp --dport 993 -m string --algo bm --string '1q2w3e4r' -j DROP
However, I don't think it's working, as the login attempts just keep coming. Probably the reason is: smtp is plain text, and imap TLS/SSL is not, so the rules never get triggered.
MJ
