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DHCP Server not assigning IP address after ISA 2004 installed

By surveymaster.shivaram ·
Hi

We are process of upgrading from SBS 2000 to WIndows 2003 Domain. Domain controller upgrade is successful. We were tesed computers and user logins attaching to new domain controller(Windows 2003 Domain). Was working fine. We installed ISA 2004 and configured rules for internal and external network. I created rule for DHCP as mentioned in the article http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/isaondhcpserver.mspx . Still Clients not able to get IP address from DHCP Server. If you have expreience the same problem, please send me the information how you fixed the problem. I really appreciate that.
Thanks

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by CG IT In reply to DHCP Server not assigning ...

I'll send you to isaserver.org . This site has a wealth of info on ISA 2004.

ISA 2004 should NOT interfer with DHCP provided that you did NOT install ISA 2004 on the DHCP box or the DNS box, rather have ISA 2004 as your perimeter firewall e.g. 2 NIC configuration on its own box with the LAN NIC on the same segment as DHCP/DNS [as as a router]. ISA 2004 works best on a stand alone BOX in dual NIC or multi-NIC configuration.

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by sgt_shultz In reply to DHCP Server not assigning ...

all the clients or just some?
can badclient ping the dhcp server
did you try ipconfig /release /renew on badclient?

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by sgt_shultz In reply to DHCP Server not assigning ...

are you using windows dhcp server?
problem on all the clients or just some?
what os and sp on badclients please.
can badclient ping the dhcp server?
take down firewall (ISA 2004) problem goes away?
did you try ipconfig /release /renew on badclient?
i would take advantage of my free microsoft support on this one...call them or visit the many many dhcp troubleshooting articles at support.microsoft.com

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