Is Our ISA2004 Compromised?
We have an ISA2004 firewall that has been fully debugged and working for
many years. I needed to block all traffic going to a subnet
22.214.171.124/22. I created both a subnet with that parameter and
separately created an address range 126.96.36.199 to 188.8.131.52. I
then made rule #1 on the ISA firewall:
ALL Traffic Types
From ALL Networks
To the subnet and address range as specified above
After Applying the rule change, the rule is simply being ignored. A
sniffer clearly shows the traffic continues right past the firewall as if
nothing has happened. The ISA Monitor shows the traffic going through, and
it references a rule way down in the ruleset that approves the traffic.
Rule #1 simply gets ignored.
What would cause this?
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