Reverse tunnel?

[ZedZipDev]

Can I create a Reverse tunnel between 2 c# applications using ssh.net if one of applications is behind of firewall?

Like this: https://github.com/eirikb/Netro

1. A listens for incoming connections, and listens for reverse tunneling.
2. B connects to A for tunneling.
3. When a client connects to A the data will be transferred through the link between A and B.
4. Connection is made on B to desired host:port.
5. Data can now flow both ways.

[Nippius]

Unfortunately no. For that you need one of the applications to be an SSH server and the other one a SSH client. SSH.NET is only the client part. However, that alone is not enough because that's not how SSH works. Take a look instead to TLS and SSL sockets to secure TCP connections.