Bogon networks are IP address ranges that should never appear on the public internet, as they are either reserved or unassigned. Blocking these ranges is a fundamental and highly effective security measure. While this can be done with simple firewall rules, integrating the blocklist directly into the Suricata IP Reputation system is far more performant.
Continue reading Bogon Defense: Integrating Dynamic IP Blacklists into Suricata’s Reputation SystemTag: IP Reputation
Inside Amavisd-new: Advanced Features for Intelligent Mail Filtering
I guess that most people use amavisd-new together with spamassassin and for example ClamAV. Probably a few more use features like DKIM verification and signing with amavis. However, there are some features which aren’t found in the usual howtos. Here are some of them.
Continue reading Inside Amavisd-new: Advanced Features for Intelligent Mail Filtering