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FireWall-1 FAQ: ndb_open: database 'magic number' corrupted(c:\winnt\fw1\4.1\database wauth.NDB)

Please note: This content was from when I was operating my FireWall-1 FAQ site, which I stopped operating in August 2005. For some reason people still have links to this stuff on the Internet that people are still clicking on.

I am making this information available again AS IS. Given how old this information is, it is likely wildly inaccurate. I have no plans to update this information.

If you're still running versions of Check Point VPN-1/FireWall-1 where this information is still relevant to you, do yourself a favor and upgrade to a more recent release. If you happen to be running a current release and the information is useful, it's by happenstance :)


How do I correct a corrupted ‘magic number’ error?

I have recently noted the following error message when compiling and uploading the firewall rules:

ndb_open: database ‘magic number’ corrupted(c:\winnt\fw1\4.1\database\fwauth.NDB

Subsequent messages indicate that the rules compile and load successfully. The firewall is an Intel box with Windows NT 4.0 and FW 4.1.


fwstop the management console, then delete from $FWDIR/database and $FWDIR/conf the fwauth. files (though be careful of deleting $FWDIR/conf/fwauth.NDB* since that’s the user database file). Do a fwstart, open the policy editor, accept the new key it wishes to generate and voila, no more “magic number” errors. However, if you use IKE Pre-Shared secrets, you will need to re-create them as they will be lost.

#Cybersecurity Evangelist, Podcaster, #noagenda Producer, Frequenter of shiny metal tubes, Expressor of personal opinions, and of course, a coffee achiever.