Reinhard Stich wrote:
hi,

IP-addresses that are configured on any other "internal" interfaces will
not be allowed as source-IP from the external interface.

Also, on an internal interface packets whose source address does not match the networks defined on that interface will be dropped.

The anti-spoofing checks also apply to packets leaving an interface,
but you should only see anti-spoofing drops for packets leaving the
system if your routing table and topology are inconsistent.

Anti-spoofing has nothing directly to do with RFC1918 addresses.

At 15:32 04.05.2004, you wrote:

Hello everyone,
i have a question about how anti-spoofing work on checkpoint firewall NG
AI.
If I configure on the topology tab of my gateway one interface as
external, does that mean private ip (rfc1918) coming from this interface
will be consider as spoofing or not ?


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