net-analyzer/scanlogd
A port scan detection tool
USE Flags
+nids
* This flag is undocumented *
pcap
Global: Build PCAP output plugin to save packets in PCAP format. Uses the net-libs/libpcap library
Local: Use net-libs/libpcap for packet capturing
savedconfig
Global: Use this to restore your config from /etc/portage/savedconfig $/$. Make sure your USE flags allow for appropriate dependencies