I'd like to make a VPN connection from my home computer
to the server at work. VPN will go through a Linksys
router sitting between the internet and my home computer.
I noticed in the instructions it states that VPN's that
use IPSec and AH (Authentication Header known as protocol
51) are incompatible with the router. AH has limitations
due to occasional incompatibility with the NAT standard.
Can anyone shed any light on this - I've used VPN in the
past through a different router and never had any
problems but I can't recall ever hearing anything about
AH. Just thought I'd ask - guess I'll find out once I get
home and try it.

Re: VPN through Linksys router into SBS by Damian

Damian
Tue Sep 09 16:56:43 CDT 2003

Hi,
If you are going to be using PPTP as the protocol for your VPN connection I
expect you to have no problems with that router limitation since you would
not be using IPSEC.

241252 VPN Tunnels - PPTP Protocol Packet Description and Use
http://support.microsoft.com/?id=241252

Regards,
Damian

--
Damian N. Leibaschoff, MS IST, MCSE
Microsoft Corporation

Get Secure! - www.microsoft.com/security

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"sammy" <sammy@nomail.com> wrote in message
news:05b201c37716$6c9006f0$a301280a@phx.gbl...
> I'd like to make a VPN connection from my home computer
> to the server at work. VPN will go through a Linksys
> router sitting between the internet and my home computer.
> I noticed in the instructions it states that VPN's that
> use IPSec and AH (Authentication Header known as protocol
> 51) are incompatible with the router. AH has limitations
> due to occasional incompatibility with the NAT standard.
> Can anyone shed any light on this - I've used VPN in the
> past through a different router and never had any
> problems but I can't recall ever hearing anything about
> AH. Just thought I'd ask - guess I'll find out once I get
> home and try it.



Re: VPN through Linksys router into SBS by JKinSD

JKinSD
Tue Sep 09 23:39:13 CDT 2003

As Damian stated, PPTP should work just fine for you. In a NAT, the AH in
the IPSEC will get dropped.

"sammy" <sammy@nomail.com> wrote in message
news:05b201c37716$6c9006f0$a301280a@phx.gbl...
> I'd like to make a VPN connection from my home computer
> to the server at work. VPN will go through a Linksys
> router sitting between the internet and my home computer.
> I noticed in the instructions it states that VPN's that
> use IPSec and AH (Authentication Header known as protocol
> 51) are incompatible with the router. AH has limitations
> due to occasional incompatibility with the NAT standard.
> Can anyone shed any light on this - I've used VPN in the
> past through a different router and never had any
> problems but I can't recall ever hearing anything about
> AH. Just thought I'd ask - guess I'll find out once I get
> home and try it.