This situation began happening right after I upgraded my Symantec Exchange Server Anti Virus and Spam. I have a 2 workstations out of a network of 80running(Windows XP) that can see the network however when you try to access the internet I get page can not be displayed. Tried to use wireless to a public network and it still is not able to access the internet. 2 Days later my mail server running Exchange has encountered the same issues. We are able to send emails internally however no one can send outgoing emails or receive them. The Nic is fine and I ran diagnostics on the server all came back fine.Neither machine can ping the Gateway 192.168.1.254 however I am able to ping the DNS & both domain servers 192.1.68.1.4 and 192.168.1.6. When attempting to ping google it times out! Windows IP ConfigurationHost Name . . . . . . . . . . . . : hir-srv-mail01Primary Dns Suffix . . . . . . . : holidayisle.comNode Type . . . . . . . . . . . . : UnknownIP Routing Enabled. . . . . . . . : YesWINS Proxy Enabled. . . . . . . . : YesDNS Suffix Search List. . . . . . : holidayisle.comEthernet adapter Local Area Connection:Connection-specific DNS Suffix . :Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit EthernetPhysical Address. . . . . . . . . : 00-13-72-3D-C1-78DHCP Enabled. . . . . . . . . . . : NoIP Address. . . . . . . . . . . . : 192.168.1.5Subnet Mask . . . . . . . . . . . : 255.255.255.0Default Gateway . . . . . . . . . : 192.168.1.254DNS Servers . . . . . . . . . . . : 192.168.1.4192.168.1.6205.152.144.23Primary WINS Server . . . . . . . : 192.168.1.6The workstation running on Auto configuration can access the internet if not on the domain.I have tested this byconnecting the workstation directly to a DSL line. I have checked DNS on the Domain Controllers and it is listed in both the Forward and Reverse areas. I removed the computer from Active Directory and re-added it. Still no internet. Not sure what else to do. Can anyone give me some suggestions on what is causing this?Domain Controllers are Server 2000 and All other servers on Network are Server 2003. Currently the firewall is disabled. Need advise quickly as Email is down across the network.

Hi, Are you sure that your default gateway (router / firewall) is working?? Sounds as if the problem lies in this box. Leif

Only three machines, the Exchange Server and 2 workstations are not able to connect. All the other systems are fine. There is a total of 80 workstations and 11 servers.

Hi, Could still be a router/firewall problem - I have seen arp table problems. Leif