FreeBSD NFS server not responding to TCP SYN packets from Linux/SunOS clients

[Jim Rees]

  where is that rule stated?  most NFS clients i am aware of retransmit an 
  RPC after 60 seconds over TCP.

Why would they do that?  I would consider that a bug.  I am only familiar
with the various bsd implementations, but none of them retransmit over tcp.

Are there buggy servers that drop rpc requests over tcp?  Why?