On 11/20/20 1:26 PM, Michael B Allen wrote:
Thanks for the inputs but my problem has nothing to do with NFS.


Do you think that because you saw "krbupdate" in /etc/services?

The problem you've described is definitely an NFSv3 problem.  The connections causing the client to hang are portmap connections. They're dynamic, and don't necessarily conform to /etc/services.

The lesson to learn, here, is that /etc/services maps names to numbers, but it does NOT map numbers to names.  Port numbers aren't reserved simply because there is a mapping to them in /etc/services.

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