O.K., I have changed the protocol to include a session byte which is set during opening of the session. Connect-ack can now only be received by the client call which is addressed (as it should have been in the first place...), and both data and status will only be received by the client with the right session id. The session id is incremented with every new connect. A snapshot of the latest files for testing is at: http://sharon.esrac.ele.tue.nl/pub/linux/ham/pskmail/snapshot/ I will do some more testing until I do an official release with all the new goodies. The change went so smoothly that i MUST have forgotten something. 73, Rein PA0R On Wed, 2006-09-06 at 10:34 +0200, Rein Couperus PA0R wrote: > Meanwhile I will tackle arq.pm to include the 'session byte'. Will > take > some time. >