-knock A script which acts as a login shell for a `tripe' user, estabishing
- dynamic assocations on demand.
+knock A script which acts as an OpenSSH forced command or login shell for a
+ `tripe' user, estabishing dynamic assocations on demand. Not
+ recommended for new deployments: use the `KNOCK' protocol instead
+ (see the `Dynamic connetion' section of connect(8), and the `ADD'
+ command in tripe-admin(5), for details).