[OpenAFS] rxtcp, rxutcp

[Jeffrey Altman]

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Russ Allbery wrote:
> Jeffrey Altman <jaltman@secure-endpoints.com> writes:
> 
>> I have found that with the Linksys routers that SSH sessions drop after
>> 10 or 15 minutes of being idle if the server decides it wants to send
>> data to the client.  It may be that the NAT will allow the client to
>> re-use the same external port if it sends data, but the mapping is
>> certainly removed in the in-bound direction after a relatively short
>> period of time.
> 
> SSH has a keep-alive option to work around this that keeps pinging the TCP
> session every few minutes.  Maybe we could do something similar?  It would
> require a bit more load on the server since the client would have to ping
> and the server respond to refresh the NAT timeout.

I am sure that you are aware that the clients already do implement a
ping protocol with separate timeouts for UP and DOWN servers.  It works
when it works and it fails when it fails.

The 1.4.1 file servers should be doing a good job of tracking mobile
clients.  If you are experiencing problems, please let us know.

Jeffrey Altman


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