![]() To solve this problem I jumps over S to T. In this scenario, I wants to connect to T who is behind a corporate firewall, NAT, and a lot of virus scanners. A reverse tunnel has these three parties: Target (T), Server (S), and Initiator (I). ![]() With the preparation from the previous example a reverse tunnel is straightforward. If you want to do the DNS resolution on the server side, then use all_proxy=socks5h://localhost:1080. Now this whole setup can be used like the following: $ ssh -NT -D 127.0.0.1:1080 -o 'Prox圜ommand=webcat -k 25 -t wss:///ssh' the internet can be accessed via like this 2: $ all_proxy=socks5://localhost:1080 curl Now the following forwarding on the server is established: port 443 -> caddy webcat ssh port 22 Proxy_set_header X-Forwarded-For $remote_addr On a webserver like caddy a config snippet like this is required: reverse_proxy /ssh localhost:4444 In order to use the Websocket tunnel, webcat will be used via the Prox圜ommand setting:įirst, a few preparations are required. N and -T is useful of you want to disable the pty and shell functionality for this ssh session. In other words you can access the internet through a SSH tunnel which is in a Websocket tunnel which goes over your fancy corporate shit proxy. Whenever a connection is made to this port, the connection is forwarded over the secure channel, and the application protocol is then used to determine where to connect to from the remote machine. This SOCKS server can be used by arbitrary software 1 to perform a dynamic port forwarding. With this flag, openssh connects to the remote host as usual, but additionally it spawns a local SOCKS server. HINT: If you just want the reverse tunnel with no websocket at all, just ignore all options with webcat. ![]() I will not go into the correct configuration of such a reverse proxy. In order to use webcat on a server, a reverse proxy like nginx or caddy with TLS is desired. Below are a few examples of how to use webcat to raise your attention. It can spawn a server, or act as a client. It does not aim to provide a shitload of features as websocat does.īasically, webcat does the same as nc does, but for websockets. Webcat aims to be the swiss army knife for websocket connections as netcat is for plain TCP. Have you ever been in a restricted corporate network where the only way to reach the internet is a dumb HTTP Proxy? It sucks. about SSH (Reverse) Tunnel Through Websocket Published: Octo.
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