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Old 01-02-2008, 12:17 PM   #1
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Question SSH Tunnels - Connection Refused

Having trouble getting an SSH tunnel to connect to my Slackware 12.0 box.

Here's my setup:

- ROUTER: forwards port SSH_PORT to SLACKWARE_12 (which I can log in fine) and forwards FORWARDING_PORT to SLACKWARE_12
AllowTcpForwarding yes
...firewall: allows the FORWARDING_PORT

Now I've tried it behind the router with the same results: Connection refused.

I don't know if it is sshd stopping the tunnel or what. inetd?

I'll try a local tunnel to see if I can at least do that.


Last edited by pricejm; 01-02-2008 at 12:18 PM.
Old 01-02-2008, 03:26 PM   #2
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This might help. Depending on what you're trying to tunnel, you could use SSH as a socks proxy.
Old 01-06-2008, 09:16 PM   #3
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I'll have to try the SSH and SOCKS out...

So I can do this:

# ssh -L 2001:localhost:25 localhost

then in that session I can telnet to localhost 2001 and get my smtp...

So I still don't know why it want let any external sessions.

If I add a "PermitOpen" to the sshd_config I'll get the error message in Putty: Forwarded connection refused by server: Administratively prohibited [open failed]

Something's changing for sure.

If I had the "PermitOpen any" I get the connection refused again.

The ports are open through the firewall, unless I'm screwing that up (I'm getting different responses, so I'd think I have the firewall right though).

I'm totally baffled at this point.
Old 01-07-2008, 04:32 AM   #4
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Disable firewall for now.
Old 01-07-2008, 11:33 AM   #5
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I set the firewall to accept all by default.

Something I thought was interesting:

sshd[12657]: debug1: server_request_direct_tcpip: originator port 0, target port 7777

When it works from my router, i.e. ssh -L 2000:server:25 or whatever, I get:
sshd[12550]: debug1: server_request_direct_tcpip: originator port 59556, target port 25

So maybe figuring out why I'm not getting an originating IP might fix me.
Old 01-07-2008, 11:55 AM   #6
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Lightbulb Finally

OK. I might be an idiot, but this seemed to fix it:

The hostname has always been domain-serv, since I always thought of my router as being after running `hostname`...bam! It finally works...

I guess sometimes it is too simple. sshd had to be resolving to my router, ergo the connection failed.

I spent a couple weeks on this just for one command to fix it...but I learned much in the process.

Now I'm only a Level 2 idiot.

Last edited by pricejm; 01-07-2008 at 11:57 AM.


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