Link to home
Start Free TrialLog in
Avatar of surys
surys

asked on

Router Port Management

I have Linksys RV0041 router and 3 serves connected to it.  All the 3 machines has telnet services running and telnet ports are opened.  i want to simeltaneously telnet to all the 3 servers.

I know port forwarding will not work.

Any soulutions ?
Avatar of Scotty_cisco
Scotty_cisco

don't think you can do that Telnet is a TCP connection and requires a ack to work properly and you would not get 3 acks with different destinations at the same time.  The only protocol that does that type of thing is multicast.

Thanks
scott
Just a thought...can you set telnet on the server to run on a different port...?
Avatar of surys

ASKER

Any idea  Linksys RV0041 support Muticast protocol. If not any other router which can support IP Multicast.

 i want to simeltaneously telnet, FTP to all the 3 servers. thru VPN.
You either have to make the servers run telnet on a port other than 23 (as computerguy suggested) or use a different outside address for each server to forward on.
telnet is a problem and Multicast is probably locally supported but not routed.  I think the better question is what are you trying to accomplish?

Thanks
scott
Avatar of surys

ASKER


I thought about running telnet servises in diffrent port, Mean time i had a question. I am intending to use SSH .
Is it possible to change the SSH port ?
You can change any port as long as the service running it is configurable.
yes you can change the ssh port so you could PAT 3 different connections.  as well you could do that with FTP and any other protocol.  
ASKER CERTIFIED SOLUTION
Avatar of TheTull
TheTull

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial

 SSH traffic occurs on TCP port 22,  you can change this port number

Router(config)# ip ssh port 2200  this command changes the port to 2200

If you change the default SSH port number, you must configure SSH clients to connect to the new port. Also, you should be careful not to assign SSH to a port that is used by another service.
You, you can change the listening port for SSH on each server. I've done it before as well to get SSH port forwarding to multiple machines behind one external IP.

Check /etc/ssh/sshd_config and there will be a port setting there.