For my Link Archive via linux port forwarding to external ip – Google Search:
- Iptables – how to portforward to external IP and ports?.
- linux – How can I port forward with iptables? – Server Fault.
- iptables – IP-dependent local port-forwarding on Linux – Server Fault (bonus: some SSH hardening tips).
- networking – Redirect requests to my external IP/port to an internal IP/port? – Unix & Linux Stack Exchange.
- Forwarding Port Traffic From a Domain to an External IP | Howtoforge – Linux Howtos and Tutorials.
- Easy Firewall Generator for iptables.
- Port Forwarding with IPTABLES or external tools like IPPORTFW, IPMASQADM, IPAUTOFW, REDIR, UDPRED, and other Port Forwarding tools.
- Port Forwarding Using iptables – SysTutorials.
Need to look at this more closely, but it looks like you need PREROUTING, FORWARD and POSTROUTING and two NATs (DNAT and SNAT), as this graph from Port Forwarding Using iptables – SysTutorials shows:
PACKET IN
|
PREROUTING--[routing]-->--FORWARD-->--POSTROUTING-->--OUT
- nat (dst) | - filter - nat (src)
| |
| |
INPUT OUTPUT
- filter - nat (dst)
| - filter
| |
`----->-----[app]----->------'
–jeroen
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