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Re: kern/53166: NFS default to UDP; it should really default to TCP
The following reply was made to PR kern/53166; it has been noted by GNATS.
From: mlelstv%serpens.de@localhost (Michael van Elst)
Subject: Re: kern/53166: NFS default to UDP; it should really default to TCP
Date: Sun, 8 Apr 2018 10:15:39 -0000 (UTC)
hauke%Espresso.Rhein-Neckar.DE@localhost (Hauke Fath) writes:
> With tcp, crash your router, and you'll have to walk up to and reboot=20
> all your clients.
Depends on the packet filter.
Normally the packet filter rejects packets for unknown connections
actively with a RST answer and the clients close their TCP sessions
A filter that silently drops unknown packets on the other hand may
require some timeout mechanism. NetBSD clients of course could be
disconnected manually using tcpdrop.
N.B. the boot code needs to support both protocols, and nowadays
preferring TCP is the better choice.
Michael van Elst
"A potential Snark may lurk in every tree."
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