On Feb 14, 2014, at 8:34 PM, SAITOU Toshihide <to...@ruby.ocn.ne.jp> wrote:

> I'm using FreeBSD as desktop and also using as nat gateway.
> After update from 9.2 to 10.0, some network problem occurs
> on this desktop machine's environment.
> 
>  - Sometimes email transmission failed with
>    `stat=Deferred: 452', maybe when the size is large.
> 
>  - Firefox failed to post a form of web page on https.
> 
>  - Cadaver is no longer able to put file.
> 
> But if I delete the following rule, the problem don't occur.
> 
>  00050 352686 304039811 nat 123 ip4 from any to any via alc0
> 
> And the related rc.conf entry is here:
> 
>    firewall_enable="YES"
>    firewall_type="open"
>    firewall_quiet="NO"
>    firewall_logging="YES"
>    firewall_nat_enable="YES"
>    firewall_nat_interface="alc0"
> 
> Is there any clue?

I saw a similar problem when using NAT on a TSO-enabled interface in FreeBSD 
10. Try running "ifconfig alc0 -tso" and/or adding "-tso" to the ifconfig_alc0 
entry in your /etc/rc.conf. See also the related entry in the BUGS section at 
the end of ipfw(8) man page.

JN

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