Very easy method to add additional port for SSH?

aulix · 07-17-2004, 07:53 AM

Hi Guys!

Please suggest:

What is the simplest way to have SSH server listening on two ports 22 and say 8022?

In my opinion it can be implemented using port redirection
from port 8022 on external IP to port 22 on the same IP. Is it correct?
Note: We should be able to coninue using port 22.

But I do not know exact commands and utilities.
On windows it could be done using AnalogX or a proxy like wingate.

Thanks for your help

aulix · 07-17-2004, 08:07 AM

I think it can be done using ipchains and ipportfw
but don't know exactly how

or may be there is an easier method ...

ppuru · 07-17-2004, 09:25 AM

edit your /etc/ssh/sshd_config

Port 8022

and/or

ListenAddress 172.31.200.10:22

aulix · 07-17-2004, 12:23 PM

Should I use two lines like following:
Port 22
Port 8022
(or ListenAddress 172.31.200.10:22
ListenAddress 172.31.200.10:8022)
?

Thanks

david_ross · 07-17-2004, 12:40 PM

The 2 Port lines should be fine. There is no point in using Listen unless you only want to use specific NICs.

newpenguin · 07-17-2004, 02:26 PM

otherwise

iptables -t nat -A PREROUTING -p tcp -d yourip --dport 8022 -j REDIRECT --to-port 22

aulix · 07-17-2004, 08:50 PM

Thank you very much.