Windows Firewall: DHCP server

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Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

Add UDP ports 67 and 2535 to the Windows Firewall exceptions list on the DHCP server.

Important

When you create a Windows Firewall exception for the DHCP protocol on a DHCP server, you must set the scope for the exception to Any computer including those on the Internet. If you leave it set to My network (subnet) only, all inbound DHCP Discover packets from client computers are dropped because the IP address of the packet is 0.0.0.0, which is not recognized by the computer as being part of the local subnet. This causes the DHCP process to fail and clients do not receive IP addresses.