Does anyone have recommendations for how I can block smtp traffic having the router completely disregard instead of having to spend time every second of every day dropping traffic attempted to connect in via smtp from spammers all around the world?
Just last week alone we had 400,000 spam messages attempted to be sent through our IP. If this many messages are coming in or rather attempting to come in, there has to be a way other than setting a rule to only accept smtp traffic from a specific IP in the case of filtering which we are utilizing.
Any ideas would be greatly appreciated. I am considering purchasing a new bank of addresses to resolve this problem but I think that it is only a matter of time before we see this issue again.
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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...