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Full Discussion: WebSocket over SSH tunnel - is it possible?
Special Forums IP Networking Proxy Server WebSocket over SSH tunnel - is it possible? Post 302931468 by Vladislav on Tuesday 13th of January 2015 09:22:37 AM
Old 01-13-2015
Computer WebSocket over SSH tunnel - is it possible?
Hello,

I have a video streaming application that utilizes a WebSocket for the server <-> client communication. My goal is to make the video streaming service available over the internet in the cases where neither the server nor client have public IPs.

One way to do this is over a VPN connection, but I prefer not to use a VPN at all. That's why I decided to try and forward the communication over an SSH server via remote port forwarding.

However I am facing an issue - forwarding the server socket is pretty straight-forward, but I have no way to know in advance what the randomly allocated client port will be, so the traffic will flow only in the direction client -> SSH server -> streaming server.

When the SSH relay point receives the responses from the streaming server it does not automatically route them back to the client and the WebSocket handshake cannot be completed.

Do you think it is possible to overcome this issue or should I drop the WebSocket altogether and revert to a normal HTTP / TCP connection?

Thanks!
 

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LEARN ABOUT SUNOS

in.echod

in.echod(1M)						  System Administration Commands					      in.echod(1M)

NAME

       in.echod - UDP or TCP echo protocol service daemon

SYNOPSIS

       in.echod

       FMRI
       svc:/internet/echo:default

DESCRIPTION

       FMRI  stands  for  Fault  Management  Resource  Identifier.  It is used to identify resources managed by the Fault Manager. See fmd(1M) and
       smf(5).

       The in.echod service provides the server-side of the echo protocol. This protocol is used for debugging and bandwidth  measurement  and	is
       available on both TCP and UDP transports, through port 7.

       The in.echod service is an inetd(1M) smf(5) delegated service. The in.echod detects which transport is requested by examining the socket it
       is passed by the inetd daemon.

       TCP-based service

	   Once a connection is established, the in.echod echoes any data received from the client back to the	client.  The  server  echoes  data
	   until the client program terminates the connection.

       UDP-based service

	   The	in.echod listens for UDP datagrams. When a datagram is received, the server creates a UDP datagram containing the data it received
	   and sends it to the client.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNW			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       inetd(1M), attributes(5), smf(5)

       RFC 862

SunOS 5.10							    23 Aug 2004 						      in.echod(1M)
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