NAT and ports

[Phil Barbier]

Do I have to leave some special ports open on my firewall for NAT to work
correctly?

Not that I am aware, no.

 Or does NAT never traverse iptables INPUT and OUTPUT chains?

Yes, it happens all on the iptables chains themselves.

For example:
If I have a DROP by default policy, do I have to enable some ports for NAT?

No.

Happy to help,

Phil.

--
Phil Barbier
Registered Linux User #227794
Web Developer & Linux Systems Administrator
Online-Bills Ltd
http://www.online-bills.com/
mailto:p.barbier@online-bills.com?subject=from_email