Thread: SSHD port for Putty

hi I discover something yesterday my ISP is blocking port 22 I gues its remote control port or something anyway

I wonder how can I change my SSH conection port I can connect my server with out port 22 because its blocking from My ISP

I checked /etc/ssh/ folder



and I did Ls -a got this


moduli sshd_config ssh_host_key ssh_host_rsa_key.pub
s2.cfg ssh_host_dsa_key ssh_host_key.pub
ssh_config ssh_host_dsa_key.pub ssh_host_rsa_key


I checked /etc/ssh/sshd_config


# What ports, IPs and protocols we listen for
Port 22
to
port 888

and from /etc/ssh/ssh_config

IdentityFile ~/.ssh/identity
# IdentityFile ~/.ssh/id_rsa
# IdentityFile ~/.ssh/id_dsa
# Port 22

# port 888

can anyone tell me why its not worked ? so far I checked rest files but there is nothign about port's number

thanks

It should work when you changed the config file of sshd. I've done it that way myself last week, but for a server that is not connected to the internet...
Did you restart the service after you changed the file? If not, please do so.

Also, are you behind some kind of nat-router / firewall / proxy? If yes, remember to configure a dnat rule for your new port.

Your ISP blocked port 22? That's very strange, because it doesn't make sense to block destination port 22. Just for clarification, is this a server or a home computer you are trying to connect to?

If this is a server, you can change the daemon port to any other port you like at /etc/ss/sshd_config. You should have something like this:

Code:

#port 22
port 8888

Then run

Code:

/etc/init.d/sshd restart

Now you can connect to your server using putty, port 8888.

Edit: These changes should be done on your server. It has no effect if you change it on your own Linux PC. If you still can't connect to port 8888, then you might have some outgoing port connection, or your server is rejecting you. Make sure that you have no firewall blocking on your server (e.g Iptables).

Originally Posted by Seeyabye

Then run

Code:

/etc/init.d/sshd restart

I think he may have problems running that when he cant ssh lol

I noticed you talked about "/etc/ssh/ssh_config" which is for the ssh client (not the server) on linux.
If your client is a linux box you'll need to tell it to use the desired port by changing
# Port 22
to
port 888
(note the pound sign must be removed so that line is not commented out)

On the other hand, the thread talks about putty which is primarily a winblows app, so if you're running putty from a M$ machine, make sure you tell it which port to connect to as well.

If you're still having trouble after that, as a troubleshooting measure, you can telnet to the sshd server port and you should see a banner message appear. From windows, the command is

Code:

telnet <IP> <port>

You should get a response something like

Escape character is '^]'. SSH-1.99-OpenSSH_3.9p1

Originally Posted by Elephant

I think he may have problems running that when he cant ssh lol

This post made me laugh! If you can't SSH to change the port you could mabye try SSH via a web browser using a trustworthy site such as GotoSSH.com - A Web Based SSH client