Hello people,

I have just run into a weird problem, which I was able to fix but I am
basically looking for an explanation as to *why* it happened and I am
therefore wondering if anyone else has seen this scenario before?

Nokia IPSO 3.5.1 Check Point FP3 HotFix 2 + SSL (standalone install)

After working for weeks since its last policy modification early in the
morning the firewall began dropping all packets from itself and to
itself with reference to SAM/CPMAD

Users NATing out of the firewall could work fine, connections to
statically NATed address on the firewall for things like email servers
work fine, but anything with the source or destination IP of the
firewall were dropped by SAM, thus the site-to-site/client-to-site vpns
were all broken.

Turns out that somehow the firewalls IP address was placed in the
sam_blocked_ips table and thus was rejecting itself on most of the
things it was meant to be doing, now before I determined this, after
looking around and restarting FireWall-1 (and killing SAM) FW-1 would
restart, CPMAD would start up and then cpmad would turn into a zombie
process, FireWall-1 believed it was running and therefore could never
actually shut it down.

CPMAD only stopped being a zombie when I discovered and cleared the
firewalls IP from the sam_blocked_ips table, once cleared from the table
all resumed as normal, and since then, more than 48 hours ago the
firewall has carried on working as it should.

Has anybody seen anything like this before, and if so or even if not
could someone explain to me what kind of attack could render the
firewalls IP address to be placed in the sams blocked IP table?

Cheers,

Brendan


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