ForwardedPortRemote incredibly slow

[Gdocal]

Hi
I am using SSH.NET to make remote port forwarding. I use created tunnel for http proxy and proxy works incredibly slow, it takes 20 times more time to load some usual page though SHH.NET comparing with putty tunnel. What can be done to increase performance?

[drieseng]

What version of SSH.NET are you using?

[Gdocal]

hi. sorry my bad
SSH.Net version 2016.0.0.0

[drieseng]

I don't think much has improved since, and - to be honest - I don't immediately see areas where we can easily improve performance.

I'll try to find time to reproduce this issue.

[Gdocal]

Do I need to help to setup environment? I can give you immediately two servers: one with Windows Server where you can setup your tests, and one with linux where SSH server configured.
Do you use multiplexing for tunneling?
Difference is really huge, so there should be something what can be improved.

[Gdocal]

To reproduce issue you need to have
-Server #1
Program with SSH.Net client
Putty client ( to see difference)
Any proxy software: Fiddler, 3proxy for example
-Server #2
With any ssh server configure on it
-Any other pc to make requests #3

1. Code to be exected on Server stable release #1
   SSH.Net code:
   var server="";
   var boundPort=3577;
   var localHost="127.0.0.1";
   var localPort=3578;
   ForwardedPortRemote port = new ForwardedPortRemote(server, boundPort, "127.0.0.1",localPort);

2. Proxy on Server stable release #1 should listen on port 3578

3. Setup firefox or any other browser with use next proxy: : 3577

try to access page like https://whatismyipaddress.com/ which make a lot of requests to get fully loaded.

then make connection to ssh trought putty to see difference.

you can use this addon to see difference clearly. https://addons.mozilla.org/ru/firefox/addon/apptelemetry/

[drieseng]

We're not using multiplexing.
I'll try to find time, but I'm afraid this will not happen any time soon.

[Gdocal]

https://github.com/Azure/azure-relay-dotnet/tree/dev/samples/portbridge/PortBridge
maybe this can help, there is implementation of multiplexing tcp conection

[keyoti]

That sample moved to https://github.com/dynamicdeploy/portbridge