TCP connections that never die.

[Glen Eustace]

I have been having problems with a UDP program I have written for my PC,
it used to work but then stopped.  Each time I read a packet I actually
got a string 'bad format' returned.  I had checked the code on the unix
host, our 9815 and it was sending the right packet, or so I thought.  To
convince myself that the problem was on the PC and not the Pyramid I
watched the conversation with etherfind on a Sun386i, I saw what I wanted
that the correct UDP packet was sent by the Pyramid.  However, what I
also saw has me really confused.

At the present time the Pyramid is sending a TCP packet to my PC about
every 60secs. The contents of the packet is 'login timeout after 60
seconds\r\n', the packet is a 'FIN' one.  Further investigation, i.e.
netstat on the Pyramid shows several TCP connections, my one definitely a
telnet session, in the FIN_WAIT_1 state.  I would have thought that there
must be some limit in trying to close a connection.  Other than
rebooting, is there anyway to actually get rid of these connections. I am
curious as to whether they are part of my PC problem.

--
  Glen Eustace, Software Manager, Computer Centre, Massey University,
   Palmerston North, New Zealand. Phone: +64 63 69099 x7440 GMT+12
             E-Mail via Internet: G.Eustace at massey.ac.nz
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