Jeff Liebermann wrote:
> Aloke Prasad <aprasad123@columbus.rr.invalid.com> hath wroth:
>
>> My trusty BEFSR41 failed after many years of service (it was unable to
>> get IP address lease from the cable modem). I purchased a WRT300N,
>> figuring that I might use the Wifi feature in the future, even though I
>> don't have any wireless devices right now.
>>
>> So, I install the new router, change my password, disable the Wireless
>> features, verify that the VPN passthrough are enabled. My 2 PC's
>> (running XP Pro) in the LAN can access the internet just fine .. until I
>> initiate VPN (Cisco client) on the PC I use for work. As soon as that
>> VPN is established, I lose all connectivity on that PC. I cannot ping
>> any devices at work or on the internet.
>
> Can you ping the router?
>
>> I even disabled the firewall
>> features on the router, but to no avail. All functionality was restored
>> when I disconnected from the VPN.
>>
>> I returned that router and installed a WRT54GS. Everything, including
>> VPN worked right off the bat (I changed the password and disabled
>> wireless on this as well.). Again, VPN passthrough (all 3 protocols)
>> was enabled (by default) in both routers.
>>
>> I can only conclude that there is some bug in the WRT300N firmware.
>>
>> The hardware and firmware versions of my devices were:
>>
>> WRT300N: ver 1.1 Firmware 1.51.2 dated 6/4/07
>> WRT54GS: ver 7.0 Firmware 7.50.0 dated 3/20/07
>
> Those are the current versions.
>
>> Any ideas, comments?
>
> Check what IP address is being delivered by the remote VPN server.
> Run:
> start -> run -> cmd <enter>
> IPCONFIG
> With the VPN connected, you should have TWO different IP addresses,
> and gateways. What are they? The gateway is especially critical
> because it probably points to the corporate VPN server, which is where
> you should be getting your remote connectivity.
>
> IF the IP's look ok, then try:
> route print
> That's the routing table, and yes, it's difficult to read and
> understand. Compare what you get with the two routers and see if
> there's anything different. They should be identical. The line with
> "default gateway" is especially important as that's where you packets
> are going. This is on a different VPN issue, but shows what to
> expect:
> <http://groups.google.com/group/alt.internet.wireless/msg/adfe2f8f165f0e66>
>
> Yet another guess(tm). Does your local network use the same class C
> IP block as the office LAN at the other end of the VPN tunnel? For
> example, are you using 192.168.1.xxx for both work and home? If so,
> change the IP block at home to 192.168.something_else.xxx and see if
> it works. Most routers will deal with the inevitable duplicate IP's
> and convoluteed routing but many do not.

It is difficult to troubleshoot the WRT300N now, as I have returned it
to the store. I was wondering if anyone else has experienced problems
with VPN using this router.