Our company’s internet connection is set behind a NAT by our ISP. In order to do remote administration of our (very small) LAN, I am trying to set-up an SSH tunnel through our Dreamhost account. But this is my very first experience with tunnels, and I can’t get it work.
I would like to access a server on our LAN from a from oustide network through an SSH shell.
The host I want to have access to:
remote$ ssh -R 55555:localhost:22 email@example.com
On the machine from where I want to do the administration:
local$ ssh -L 55555:firstname.lastname@example.org:55555 email@example.com
Now, I should be able to log-in:
local$ ssh -p 55555 firstname.lastname@example.org
But I get the following error:
ssh: connect to host myhost.dreamhost.com port 55555: Connection refused
I choose the port at random between 49152 and 65535, because I think that this shouldn’t interfere with anything else.
I thought that SSH tunnelling might be disabled in DH, but from previous threads in this forum, I see that it IS possible.
Anyone knows what I’m doing wrong?
This other login method fails also:
ssh -p 55555 localhost
with the following error:
ssh_exchange_identification: Connection closed by remote host
And on an open ssh terminal on DH I the following message appears:
myhost$ channel 3: open failed: administratively prohibited: open failed