Win2k3 - Cisco PIX Issue? - Some Laptop users periodically unable to connect to internet but able to connect to local network
Posted on 2006-04-06
We have a strange issue here. Some of our laptop users periodically run into problems where they are able to connect to the intranet; however they are unable to connect to the Internet. We have about 15 Computers connected to our network, 6 Desktops and 9 Laptops (IBM T43's) all running XP Pro SP2. Our DNS/DHCP/Active Directory/Fileserver is running Windows 2003 SP1. We have a Cisco PIX 515E (version 6.3.5) appliance that acts as our Firewall/VPN and connects to our DSL line.
It seems like the Laptop users that have problems are not always the same, however the problem is always the same in that they are not able to connect to servers outside our local network. When I do an ipconfig the configuration looks correct (see example)
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : example.com
IP Address. . . . . . . . . . . . : 192.168.1.44
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
The laptops typically have both Ethernet and Wireless connections enabled and appear to both have correct settings in the ipconfig
Another interesting condition is that if I disconnect the wired connection and connect to an outside wireless network the laptop users are able to connect to the internet.
I’ve looked at the configuration settings on the laptops (all use DHCP) and they are all the same and appear correct. Any suggestions on checking the Windows Server / Cisco PIX / Network would be appreciated!