portsentry(8) on Linux
The text a16c5b69fecd, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it. The page shows this text now.
detect portscan activity
Flags it lists
-
-atcp -
-audp -
-stcp -
-sudp -
-tcp -
-udp