Windows 7 will not reolve to or ping and internal network address

Windows 7 will no longer resolve to an internal URL in our facility.  The Windows XP machines still do.  We have tried everything.  No interal changes have been made to the network.  It just stopped working one day.
Enrique MalacareSystems EngineerAsked:
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strivoliCommented:
Did you try using nslookup?
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ToxaconCommented:
Does the URL have a full name (FQDN) such as myserver.mydomain.com or just myserver?
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Jason WatkinsIT Project LeaderCommented:
Is IPv6 disabled on the Win7 machines? Try turning it on, if so.
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Enrique MalacareSystems EngineerAuthor Commented:
Ipv6 makes no difference on or off.  Full domain. nslookup does work.
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ToxaconCommented:
Have you changed dns suffix lists recently? Have you tried to disable the firewall, then wait a few minutes and try again?
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Enrique MalacareSystems EngineerAuthor Commented:
Have done it all.  Looking to DNS records Firewall configs and malware that may have run into errant traffic and disengaed access for security reasons.  Done it all and nothing.  Xp resolves for a time and then quits.  We reset the arp cache on the server and connectivity resumes for Xp.  The other card obn the server is fine and PCs always within this self contained network.
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ToxaconCommented:
"The other card"? Do you have multiple NICs on the server I.E. it is multihomed? If this is the case, you must unbind Netbios from all server NICs but one facing the domain and disable all dynamic updates to DNS.
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ToxaconCommented:
"Dynamic updates to DNS" means that the NIC does not update DNS but you have to update it manually.
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Enrique MalacareSystems EngineerAuthor Commented:
static IPs all the way around
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ToxaconCommented:
Does each adapter in the server have a default gateway?

Yes, you can have static IPs, but is the option "Register this connection's addresses in DNS" selected in all adapters?
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Enrique MalacareSystems EngineerAuthor Commented:
One adpater has a gateway.  The problem adapter.  One adapter points to a closed network that does not acess the internet.  This one is fine.

Each adpater had the "Register" bosx checked.
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Enrique MalacareSystems EngineerAuthor Commented:
As it urns out,  there was another device on the network that was running arp proxy.  Once turned off, everything worked fine.
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LeeTutorretiredCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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