ssh tunnels

[PeterMu]

Hi,

I have an OpenSSH tunneling problem, any guru's available (I'm a Golum) ??

The problem is this:

serverA <-- firewall <-- serverB --> firewall/NAT --> serverC

The firewalls only allow serverB to ssh to servers A and C, they can't ssh to each other or to serverB

So on serverB I'm trying to establish tunnels from A to B and B to C, it's so an isql session on serverA can access the Sybase database on serverC

The following looks as if it should work, but doesn't - the only sniffer I have is snoop, which can't see loopback traffic. 'netstat -a' shows listeners on the ports on A and B

ServerB:
ssh -l pmutton -N -g -f -R 2052:localhost:2099 serverA
ssh -l pmutton -N -g -f -L 2099:localhost:2052 serverC

I've googled & found examples of just one of the tunnels, but no examples of what I'm trying to do

Am I trying the impossible ??

Peter

[JosephMu]

hello¬I m Joseph..Mu as well lol
i think here is The Coffee Lounge where all the members trying to introduce ourselve and say hi to others.
why not try some other discussion board?

[Bemk]

check again Joseph

[kakariko81280]

Off the top of my head, you could try:

ssh -l pmutton -N -f -R 2052:serverC:22 serverA

Then on serverA ssh to localhost port 2052. ServerC should then see the traffic as coming from serverB.

Let us know how you get on,

Chris...