[vpn-help] Failure to bring up tunnel with Windows 8 through NAT

[Chris Swinehart]

Jim,

Thanks for the reply. Here are the models that I'm dealing with:

VPN Server: Cisco RV042

Routers tested: - Old Belkin router without VPN passthrough feature (Win7 
laptop works with this, haven't tested Win8 laptop)
		- D-Link DIR-825 router with VPN passthrough enabled (Two Win7 laptops work, 
Win8 laptop doesn't)

Both Win7 and Win8 clients work with an iPhone WiFi hotspot.

I've tried the same configuration on two Win7 laptops, same configuration, 
they both work. Win 8 laptop doesn't. I followed your instructions: rebooted 
the router then tried connecting with the Win 8 computer, it failed. I 
immediately tried connecting with the Win 7 client and worked.

Here are the NAT traversal settings in the shrew client:
NAT Traversal: enable
NAT Traversal Port: 4500
Keep-alive packet rate: 15 secs
IKE Fragmentation: disable

I've also tried running the client in Win7 compatibility mode, both the 
installer and the access manager itself, with no change in behavior.

Any more thoughts or suggestions?

Thanks,

Chris Swinehart

Mesotech International Inc.
4531 Harlin Drive
Sacramento, CA 95826
916-368-2020 (Voice)
916-368-2030 (Fax)
http://www.mesotech.com


-----Original Message-----
From: Jim Harle [mailto:vpn at technicolor.com]
Sent: Thursday, August 22, 2013 10:40
To: Chris Swinehart
Cc: vpn-help at lists.shrew.net
Subject: RE: [vpn-help] Failure to bring up tunnel with Windows 8 through
NAT

This doesn't sound like a NAT issue per se...the cell phone could be acting
as a NAT device depending on how you connect to it (such as via wifi).

Have you tried other NAT'd locations besides the router you speak of?

Can you provide the NAT traversal settings being used in the Shrew VPN
profile?

What is the model of the router that you are testing with, and does it have
"vpn passthrough" enabled on it?  Have you tried connecting the Windows 8
client first (after a router reboot) or does it still fail, and the Windows
7 client works when trying to connect it 2nd?

Just my thoughts,

Jim

-----Original Message-----
From: vpn-help-bounces at lists.shrew.net
[mailto:vpn-help-bounces at lists.shrew.net] On Behalf Of Chris Swinehart
Sent: Thursday, August 22, 2013 10:04 AM
To: vpn-help at lists.shrew.net
Subject: [vpn-help] Failure to bring up tunnel with Windows 8 through NAT

I wasn't able to find any other reports of known issues with connecting to a
VPN behind NAT with Windows 8 and v2.2.2, so here is the description of my
situation:

1. I am using the same imported configuration file on both a Win 7 and Win 8
laptop.
2. Both the Win 7 and Win 8 laptops can connect to my VPN server without
going through NAT (connected via a cell phone hotspot).
3. When trying to access the VPN through a router, only the Win 7 laptop can
finish bringing up the tunnel. The connection process on the Win 8 computer
pauses and the tunnel never comes up. I tested this using the exact same
router with the exact same router configuration.

This leads me to believe that the problem lies somewhere on the Win 8
computer. Any ideas or further troubleshooting steps I can take?

Thank you,

Chris Swinehart

Mesotech International Inc.
4531 Harlin Drive
Sacramento, CA 95826
916-368-2020 (Voice)
916-368-2030 (Fax)
http://www.mesotech.com


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