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05.07.2008 at 01:18PM PDT, ID: 23384175
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9.0

VPN Connection to Cisco ASA 5540 using Vista; DNS servers show as hex

Asked by RTPIT in Cisco PIX Firewall, Virtual Private Networking (VPN), Windows Vista

Tags: , ,

I recently installed an ASA 5540 to replace my PIX 525. I have setup the client-side VPN with Windows IAS/RADIUS to authenticate users against AD and to push DNS and WINS addresses that are AD DCs for name resolution of domain resources. This works absolutely flawlessly with Windows XP machines. I can ping and access applications by AD DNS name and traverse point-to-point tunnels already established on the 5540 using the "hairpinning" or "U-Turn" feature (very cool by the way).

However, when connecting with my Vista Business laptop, the DNS servers being assigned by the VPN device show up as hexadecimal and name resolution fails. I can access any resource by IP succesfully, so I'm nearly positive that this is a DNS issue.

I have turned off IPv6 on the Vista machine to no avail. I am using the 5.0.3.0530 version of the Cisco VPN client and have tested that same client on an XP machine and of course the XP machine works fine. Below is a screen copy of the ipconfig screen related to the VPN connection:

Ethernet adapter Local Area Connection 2:

   Connection-specific DNS Suffix  . : MYDOMAIN.local
   Description . . . . . . . . . . . : Cisco Systems VPN Adapter
   Physical Address. . . . . . . . . : 00-05-9A-3C-78-00
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::a55d:8736:ac3e:24fe%12(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.80.5(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 0.0.0.0
   DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                       fec0:0:0:ffff::2%1
                                       fec0:0:0:ffff::3%1
   NetBIOS over Tcpip. . . . . . . . : Enabled

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[+][-]05.28.2008 at 06:52PM PDT, ID: 21665785

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[+][-]06.06.2008 at 09:21AM PDT, ID: 21730445

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[+][-]06.06.2008 at 10:39AM PDT, ID: 21731160

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[+][-]06.06.2008 at 10:51AM PDT, ID: 21731248

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About this solution

Zones: Cisco PIX Firewall, Virtual Private Networking (VPN), Windows Vista
Tags: Cisco, VPN Client, 5.0.3.0530
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Solution Provided By: cls10378
Participating Experts: 2
Solution Grade: A
 
 
 
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