Latitude Dx20 laptop will not vpn on wifi

[f0rmat]

I started to get in the x20 series of Dells, and much to my horror, it appears that there is something within the factory default settings/software that is preventing my cisco VPN clients from working.

We use Cisco VPN 3000 for a concentrator and 4.8 on the client side. The behavior is the following.

TCP connections are rejected and never connect(fails over to the backup)
UDP connections will connect, within the debug logs I see it connecting to my concentrators, but I can't ping anything internally.
If I bring home a non x20 laptop(a D505 or a D610) it can connect via wireless fine, so I don't think it's my router, and I can plug my D820 into my router and VPN fine over ethernet, so it appears that there is some type of software having to do with the wireless that is causing issues. I've already removed the embassy security suite that comes with the machines in hopes to help, but it does not.

I really don't want to have to go through the trouble of wiping the machine, reinstalling a vanilla XP install, and reinstall the drivers manually, it'd be a real pain.

Has anyone had any experience with this or possibly have any ideas? Windows firewall is turned off and from what I can tell there is nothing else that would effect this. Like I said.. LAN works fine.

TIA

 

[Packet7]

Hi,

Do you have Transport Tunneling enabled? Modify your existing connection and click the Transport tab. Are you using IPsec over UDP (NAT/PAT)? If not, give that a try.


Rgds,

John

 

[f0rmat]

transport tunneling is enabled, and UDP does not work. UDP will "connect" seemingly, but not really since I can't access any internal IPs. As I said, the exact same config works perfectly fine on the lan so it has to be some kind of security/firewall software on the laptop itself ..

 

[Packet7]

Was the Cisco VPN client installed before or after the WLAN client/settings? I believe the VPN software will need to bind to the WLAN adapter in order for it to work. If the Cisco VPN client was installed prior, I would save your profile and re-install. If that doesn't work, I would call Dell and ask them if they are aware of any issues. You may need an updated driver or a patch from either Dell or Cisco. Since your FW is off, I don't think there is any additional software preventing you from using the VPN. Keep me posted.

Rgds,

John

 

[f0rmat]

I actually figured this out on my own(sorta) It's a known issue from Dell, but their tech support was not aware of such issue. I actually followed a link from Michigan University's website linking to this problem. There is a known issue on cisco 4.6 and higher with the dell(broadcom) 1390 and 1490 cards(theres a whole slew of them) but these are what I was concerned with. There is a VLAN priority setting that is causing all of this grief. I set this to disabled and things began to work. I'm going to spend the rest of the weekend testing to see how things go, but I think I'm good. I also am having dell send me a few Intel 3945 b/g dualband cards to see if there is a bug within that card. If not, I'll switch solely over to the 3945's.

Thx for the responses.