[Vpn-help] SSH connection hang with beta 2

Matthew Grooms mgrooms at shrew.net
Sat May 5 10:04:39 CDT 2007


Tai-hwa Liang wrote:
> 
>   FreeBSD 6.2-STABLE + pf.
> 

Hello again,

I have seen pf drop packet fragments on an interface unless you specify 
the following in your configuration file ...

scrub all fragment reassemble

ESP traffic is especially susceptible to this due to the encapsulation 
overhead. If that doesn't work for you, specify a rule like ...

scrub all fragment reassemble max-mss 1440

... which is similar to what NetBSD folks suggest when building a VPN 
Gateway using ipf.

http://www.netbsd.org/Documentation/network/ipsec/rasvpn.html#more_frag

Thanks,

-Matthew



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