[ILUG] telnet problem

[Michael Armbrecht]

Am Freitag, 4. März 2005 21:17 schrieb Robin Strahan:
> Hey all,
>
> I've set up port fowarding/tunneling from a machine with limited
> network access to one with unrestricted access using putty.
>
> One of the port forwards/tunnel is to a newsgroup server on port 119.
> "ssh -L 119:newsserver:119 username at remote_machine"
>
>  This should allow me to connect to the news server if i direct my
> news reader to connect to port 119 on the localhost.
>
> For some reason this will only work under root login. A normal user
> login won't allow the connection. (connection refused).  Under normal
> login I CAN however access another port forward on port 1080.
>
> "ssh -D 1080 username at remote_machine"
>
> So why am I prevented connecting to port 119 on localhost under a
> normal login? Anyone got any ideas?

My guess is that in order to tunnel the connection you need to open the port 
as well on the localhost -- which you can only do as root, as it is a 
privileged port (i.e. port number < 1000). 

Michael

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