[OpenAFS] client behind NAT firewall

Dale Pontius pontius@btv.ibm.com
Wed, 06 Aug 2014 15:33:02 -0400

On 08/05/2014 11:08 AM, Simon Wilkinson wrote:
> The complication is that firewalls/NATs only preserve these mappings 
> for a finite length of time. We attempt to keep them open through 
> regular fileserver pings, but sometimes that isn't enough. When a 
> mapping expires, the client is unable to receive callbacks until it 
> next contacts the fileserver. 
I fiddled with this many years ago, only on the client side.  On the 
advice of a friend I adjusted the connection timeout rules from the 
default to 15 minutes.  I'm under the impression that afs will give up / 
re-establish after 5 minutes, and 15 minutes was a bit of guardband 
against that.  I was happy enough running the client this way, but 
shortly after an area move got me into an office with an additional 
port, and I quite NATting through one box to another.

Obviously this was client side, but I find it hard to believe that 
keeping a connection mapped for the 2 hours mentioned elsewhere would be 

Dale Pontius
Senior Engineer
IBM Corporation
Phone: (802) 769-6850
Tie-Line: 446-6850
email: pontius@us.ibm.com

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