ssh over internet / reverse tunneling

[sduttonusa]

I've been trying to set up reverse tunneling (over the internet) to my laptop. I'm able to do it on my LAN, but when I try it with someone tunneling from outside my LAN, I'm given the following message:

"Could not resolve hostname mypersonalname.dyndns.info:forwardedport: nodename nor servname provided, or not known" ("mypersonalname" and "forwardedport" are what I've setup)

For a while, I was getting a "connection refused" message due to the fact I had NetBarrier installed. So now, after disabling NetBarrier, I'm given the above message.

Any idea what the problem is?

[Satcomer]

It would help to let us know what Mac running what software and what firewall are you using.

[sduttonusa]

I'm running MacOS 10.5.8. I'm forwarding external port 30001 to internal port 22. I'm behind a NAT router, and I don't think I have any firewalls enabled.

The command I'm typing for reverse tunneling is:

ssh -N -R 22548:localhost:548 -R 22590:localhost:5900 username@HOME.dynamic.dns.name:30001 &

When on my home LAN, I replace the dyndns address with my LAN address and I can both mount the other Mac's files and screen share with no problem.