DHCP Server is not serving clients after SBS SP1 update

Q: My SBS servers DHCP server is not serving IP addresses to my clients since I updated to SBS SP1

A: Turns out that ISA 2004 protetects the internal firewall by default and that Internal network is not set up with the Broadcast address .255. This means that the DHCP requests never reaches the server.

Go to Configuration – Networks – Networks – Internal and edit it to include 255

Source

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