Re: Fragmentation over VPN

["kevin horvath" <kevin.horvath () gmail com>]

On both interfaces reduce the size to say about 1350 max to take into
account the ipsec overhead.  Otherwise larger packets will be dropped since
when they go to the interface ipsec (esp) overhead will put the packet over
the 1500 allowed across most router interfaces in route:

ie do this:
ip tcp adjust-mss 1350



On 3/8/07, Alex <anobre1 () gmail com> wrote:
> Hi everyone,
>
> First time poster here (as if anyone cared <g>).
>
> I have this scenario:
>
> Three offices need to connect via IPSec (L2L) and each also runs EZVPN
> server for clients to connect to.
>
> There is a 506E, and ASA5510 and an ISR 1801W. The configuration for the
> 506E and ASA5510 were easy enough and everything is working fine. On the
> 1801 is a different story. I get the SA's done with no problems, but then
> no
> other traffic flows through and I suspect this has to do with
> fragmentation.
>
> On the outside interface (Dialer1), I have "mtu 1492" and on the inside
> (VLAN1) I have "ip tcp adjust-mss 1452". Everyone behind the device can
> browse the internet without any problems (yes, PAT).
>
> Can some kind soul please provide some ideas on how to get around it?
>
> Much appreciated.
>
> Alex.
>
> _______________________________________________
> firewall-wizards mailing list
> firewall-wizards () listserv icsalabs com
> https://listserv.icsalabs.com/mailman/listinfo/firewall-wizards
_______________________________________________
firewall-wizards mailing list
firewall-wizards () listserv icsalabs com
https://listserv.icsalabs.com/mailman/listinfo/firewall-wizards