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 From:  "Aaron Cherman" <aaronc at morad dot ab dot ca>
 To:  "Jeroen Visser" <monowall at forty dash two dot nl>, <m0n0wall at lists dot m0n0 dot ch>
 Subject:  Re: [m0n0wall] Hangs - solved
 Date:  Fri, 9 Feb 2007 07:39:51 -0700
> Does anyone who experience lockups on the firewall entered a custom MTU 
> value on
> the WAN interface?
> I've changed the MTU size on one of my firewalls which has NEVER locked up 
> before
> and it took just a day for it so hang. Same symptoms as I had with out 
> main
> firewall, which had a custom MTU size also, but not since I upgraded it to 
> the
> last version of m0n0wall which has this MTU setting removed.

I always had custom MTUs on my VLAN interfaces but never on the WAN. 
Currently running 1.3b1 with no custom MTU sizes on any interfaces.