Microsoft has released Service Pack 1 for ISA Server 2004.
It's fairly straightforward and so far seems to just be mostly bugfixes and minor features upgrades, such as allowing the co-existence of form-based authentication and RADIUS.
I just upgraded my home firewall setup over lunch; it went very smoothly. Here's the procedure I followed:
- I downloaded the SP1 upgrade, the Release Notes, and the Windows Installer 3.0 upgrade (you don't need this on any XP SP2 management stations you might have, but you should have it on your Windows Server 2003 boxes before you apply the service pack).
- I actually read the Release Notes. They're small and unassuming.
- I made sure to run Windows Upgrade on my firewall machine to make sure all the latest OS patches were present. I did not reboot when prompted, because...
- I then installed the Windows Installer ugprade. After that, I rebooted.
- I exported a current copy of my configuration and saved it to a separate machine.
- I ran the SP1 installer and rebooted when asked.
- I waited for the firewall to come back up and verified that everything was still working as it was supposed to.
Pretty simple, really. If you have any plug-ins (like the useful ones from GFI), you might want to verify they are SP1-compatible before applying the patch, but I don't know of any reason off-hand to think they wouldn't be.