Pix 515E - Inbound SMTP 106015 drops on outside interface
We are currently running a Pix 515E 6.3(5), no failover mode. I am getting alot of drops on the outside interface on SMTP port. The error is 106015 Deny TCP (no connection) from IP_addr/port to IP_addr/port flags. I have researched the error and it appears that this is a malformed smtp packet that is getting discarded. Is this usual behaviour or is this something I should be looking at ?
I am dropping this traffic from a wide range of public IP's.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...