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Question:

Keep SSH Tunnel Alive/Running

Aug 12 '16 at 00:45

Hi I'm trying to setup a simple SSH Tunnel client software with dynamic port forwarding.

I'm doing it in VB.net

But I'm unable to keep the SSH Tunnel alive, it disconnects as soon as the procedure/function runs, i want to keep it running and use it a browser on my PC as proxy, how can i achieve it ?

I don't want the SSH Tunnel to disconnect till i want to disconnect it

Thanks

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Answer

Well basically it was just my fault

I'm on MAC and using Parallels Desktop for Development, i was testing it using a browser on Mac rather then running a browser inside the VM

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Answer

Make sure you're using the latest version of Chilkat..

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Answer

The SshTunnel can operate in two different ways. The first way is to set a hard-coded destination host:port, such as what is done in the code above.

 m_SSH.DestHostname = m_sTunnelRemoteAddr
 m_SSH.DestPort = m_iTunnelRemotePort

This is reasonable if all communications are directed to a single location, such as a database server.

However, HTTP traffic would need to be directed to many locations. For that, you use SshTunnel in the second way -- with dynamic port forwarding. You don't set DestHostname or DestPort. Instead, you do this:

//  Indicate that the background SSH tunnel thread will behave as a SOCKS proxy server
//  with dynamic port forwarding:
tunnel.DynamicPortForwarding = true;
//  We may optionally require that connecting clients authenticate with our SOCKS proxy server.
//  To do this, set an inbound username/password.  Any connecting clients would be required to
//  use SOCKS5 with the correct username/password.
//  If no inbound username/password is set, then our SOCKS proxy server will accept both
//  SOCKS4 and SOCKS5 unauthenticated connections.
tunnel.InboundSocksUsername = "chilkat123";
tunnel.InboundSocksPassword = "password123";

See the example here: https://www.example-code.com/vbnet/sshTunnel_dpf.asp

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Answer

Hi I do understand about dynamic port forwarding, i've used exact same code as given in example but the problem is as soon as the procedure/function ends even tunnel stops, i want to keep it running, i just don't understand how to do that

Thanks

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Answer

Hera are some logs:

ChilkatLog: BeginAccepting: DllDate: Jun 13 2016 ChilkatVersion: 9.5.0.58 UnlockPrefix: xxxxxx Architecture: Little Endian; 32-bit Language: .NET 4.5 VerboseLogging: 0 listenPort: 1080 dynamicPortForwarding: 1 Listen thread started. AllocatedListenPort: 1080 Success. --BeginAccepting --ChilkatLog

As you can see it connects but then it stops, moreover i'm not closing or stopping tunnel anywhere

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Answer

Hi Issue is resolved

Thanks