ok suricata is obvious

https://github.com/stamparm/maltrail
https://github.com/future-architect/vuls
https://suricata.io/

https://arkime.com


can be done as unbound config too…

https://hblock.molinero.dev/


https://onionshare.org/


another dumb idea of mine is a smtp server u put on mx weight 100 and also listens on 53 as a rbl server…ur weight 0 smtp simply has this guy in his main.conf as smtpd restriction or something..

https://www.cowrie.org/


and so i still dunno why postfix dun have built in blackhole address.. i specify a specific email address, u send to it…ill block u…as in. ill add u to a blacklist that none of my users will ever receive mail from again…
its like when u monitor for connections at port 70 n drop their ip…
is this a antivirus?!?!?! i m so lost

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https://www.archerysec.com/

https://github.com/bhdresh/Dejavu