> > read the section of the rfc i mentioned earlier. it probably ought to > > probe > > only after a retransmission timeout period > > i believe bsd-based tcp stacks also send 1-byte zero-window probes > but use a persist timer that starts at approx. 5 seconds (*)
That's the behaviour that's suggested in Stevens' TCP/IP Illustrated, Volume 1. The relevant section is post (legally?) here: http://www.uic.rsu.ru/doc/inet/tcp_stevens/tcp_pers.htm
