There are 3 machine
- My machine
- Host A with public IP
- Target Host B with can be reached from Host A
The goal is that I and my friends want to access target host B services in convenience. We can ssh to Host A with public IP.
Local ForwardingRun this command on my machine
ssh -L 123:targetB:80 userA@hostA
- We can access targetB:80 by myMachine:123 instead
- The traffic will be forward from myMachine:123 through ssh tunnel to hostA and the forward to targetB finally.
Remote Forwarding Run this command on hostA
ssh -R 123:targetB:80 me@myMachine
- We can access targetB:80 by myMachine:123 instead
- It's similar to local forwarding but the ssh tunnel is created by hostA which is the forwarder
- The traffic will be forward from myMachine:123 through ssh tunnel to hostA and the forward to targetB finally.
Dynamic Forwarding Run this command on my machine
ssh -D 123 userA@hostA
- It's similar to local forwarding but it doesn't specify the target:port because the target address and the port will be determined automatically by application protocol such as SOCKS.
- We can access targetB:80 by SOCKS proxy in browser or OS network settings.
- Currently SOCKS4 and SOCKS5 protocols are supported.
Remarks- There might have firewall issues. It might have to change some port unless the packets will be blocked.
- This method is for TCP traffic. For UDP, you may have to try other methods.
No comments:
Post a Comment