Astaro Portscan Detection is a netfilter target which will attempt to detect TCP and UDP port scans and log them to syslog. This target is based upon Solar Designer's scanlogd. It suppports mutliple levels of logging, custom prefixes for entries, weighted total port scan detection, and port scan temporal spread detection.
The PAM authentication module for Apache implements basic authentication on top of the Pluggable Authentication Module library. Thereby it supports standard Unix passwd, shadow, NIS, SMB auth, and radius authentication transparently and interchangeably, wherever the HTTP protocol allows it.