Windows Server 2003 DNS Server Timing out

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http://serverfault.com – Having a problem with a Windows Server 2003. It's the DNS server for the local LAN it forwards requests to "" and has been working fine for years. Now today all external DNS requests are timing out. If run nslookup www.google.co.uk from the server I get "DNS Request timed out" if inside of nslookup I change the DNS server to and run the same request I also get "request timed out" I can successfully connect to on port 53 via telnet so there is connectivity.# Any ideas on what to check? Thanks. (HowTos)