Due to a change of jobs, my xDSL connection was terminated today. Luckily I have other means of Inet access, but given that I run my own server I needed some portforwarding in order to be a happy camper.
Getting access to the router using telnet was easy.
telnet 10.0.0.1 23023
It was harder (hence this post) to figure out to do port forwarding. Basic stuff first. What version of ZynOS?
ras> sys version ZyNOS version: V3.40(AHX.4) | 05/02/2008 romRasSize: 1407100 system up time: 513:16:29 (b0380b6 ticks) bootbase version: V1.06 | 1/20/2006
Using help I figure out that I needed to go for the ip section
ras> help Valid commands are: sys exit ether wan ip bridge lan
But then I was lost
ras> ip address alias aliasdis arp dhcp dns httpd icmp ifconfig ping route smtp status udp rip tcp telnet tftp traceroute xparent tredir backup mcastChan igmp policyrouting
Where was the portforward section?? I litteraly used an hour figuring out what to do. It turns out, that it is a leap of faith kind of thing:
ras> ip nat hashTable server service resetport incikeport session addrmap AOL-version9
Lo and behold, it is all there 
The rules are ordered in sets, where you edit a given rule in a set. When you get hold of the syntax it is actually quite easy
ras> ip nat server disp Server Set: 1 Rule name Svr P Range Server IP LeasedTime Active protocol Int Svr P Range Remote Host IP Range -------------------------------------------------- 1 DMZ default 0.0.0.0 0 No ALL 0 - 0 0.0.0.0 - 0.0.0.0 2 WWW 80 - 80 10.0.0.5 0 YES ALL 0 - 0 0.0.0.0 - 0.0.0.0
Then you load a set, edit the rules and write the set. Eg
# Load set 1 ras> ip nat server load 1 #edit rule 2 ras> ip nat server edit 2 forwardip 10.0.0.5 # save set 1 ras> ip nat server save
All done.
Brilliant. Thanks