How to make this connection?

Question

I have 2 servers: server1 and server2. I can't use server1's 8080 port directly only throughout server2 Now I do port-forwarding in such way:

ssh -4 -L 8080:server1:8080 user@server2

and I could connect to the first server by this address:

localhost:8080

But I want to connect by this address:

server1:8080

How can I do this?

Answer 1

Use a dynamic port forwarding and use that as you would use a socks server

ssh -D 127.0.0.1:1080 user@server2 

Then for instance:

curl --socks5 127.0.0.1:1080 server1:8080 

Answer 2

You can redirect your outgoing traffic to server1:8080 to localhost:8080 using iptables DNAT rule as follows:

$ sudo iptables -t nat -A OUTPUT -d server1 -p tcp --dport 8080 -j DNAT --to-destination 127.0.0.1