tcpdump and CIP filter portnumer

[Eddie Chen]

  I  was doing a   tcpdump  to trace a hang condition of  a process ...
mostly we was looking for nfs on  port number 4092.  However,  we found
that clearcase
  was using port#3157797047  -  that is  in the trace,    the
sourceIPaddress.3157797047  to DistIPAddress.nfs .
  The CIP, then later on,  sent back an icmp  to VMlinux  that the host
unreachable - admin prohibited filter