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I am trying to port forward through a Firehol box to my email server on port 25:

clienta:25 > firehol > email:25

This is a non-transparent connection. The command I am trying is:

nat4 to-destination [email-ip]:25 dport 25

For simplicity for now, I am going in and out of the same NIC. My routing policy is:

route all accept

I can't for the life of me get this working, and I've spent a ton of time searching for answers. I'm at the so-new-point of dealing with Firehol that all my questions are stupid.

What am I doing wrong?

dthree
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    `For simplicity for now, I am going in and out of the same NIC` - That does not make things simpler, actually it makes somethings like NAT more complex. Not even sure the rules firehol will generate would work in this type of setup. – Zoredache Oct 31 '16 at 04:35
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    Right. Trying to use a single NIC makes it somewhere between complicated and impossible. You need two (or more) NICs, or at least proper VLANs set up. – Michael Hampton Oct 31 '16 at 04:44
  • Oh haha okay I understand. – dthree Oct 31 '16 at 06:32
  • Either way, I ended up turning on masquerade and that fixed it. Odd. – dthree Oct 31 '16 at 06:41

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