Hello, participants!
In constant effort to prevent trojans to send spam following question
came to my mind.
Is there any way to replace port number for all outgoing packets?
Long version:
I want to block outgoing port 25 completely for network behind NAT
router and allow port 8025 for example. But it means that router will
have to replace outgoing port 8025 with port 25. After intensive
googling it looks like my idea is... well... not popular. So, I just
wonder if this is possible at all? Something like this:
rdr any to any port 8025 -> any port 25
PS Yes, I know that I can redirect port to open-relay on known static IP.
Thanks!
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