Forward traffic to specific IP via SSH SOCKS tunnel

Question

I'm able to SSH into 223.32.11.43 and cURL other servers on it's local network.

This works when I'm SSH'ed into :

curl -d '{my: parameter}' -H "Content-Type: application/json" 10.0.30.10
{code:200}

On a remote server I've setup a SOCKS tunnel with:

ssh -f -N -D 9090 [email protected]

I've tried to setup iptables so I can cURL internal servers on the same network as the remote server:

iptables -t nat -A OUTPUT -s 10.0.30.10 -p tcp --dport 80 -j DNAT --to-destination 223.32.11.43

But it seems to fail, at least it times out with I try to cURL:

curl -d '{my: parameter}' -H "Content-Type: application/json" 10.0.30.10
...timeout

What do to, so I can do the same cURL on my remote server?

Answer 1

This worked for me:

From your remote computer, set up the SOCKS SSH tunnel to the remote server:

ssh -D 9090 -f -C -q -N [email protected]

From the remote computer, issue a request over the tunnel:

curl -d '{my: parameter}' -H "Content-Type: application/json" \
--socks5-hostname remote.ip:9090 10.0.30.10