[Remote - Tunnels Bug] Cannot serve application from Tunnels extension as it just infinitely loads

[sck00ps]

• VSCode Version: 1.76.2

• Local OS Version: 1.76.2

• Remote OS Version: 1.76.2

• Remote Extension/Connection Type: Containers/WSL/Server

• Logs:
  [2023-03-28 11:27:17] debug [russh::server::kex] key: RSA { (hidden) }
  [2023-03-28 11:27:17] debug [russh::server::encrypted] request: Ok("ssh-userauth")
  [2023-03-28 11:27:17] debug [russh::server::encrypted]
  [2023-03-28 11:27:17] debug [tunnels::connections::relay_tunnel_host]
  [2023-03-28 11:27:17] debug [tunnels::connections::relay_tunnel_host]
  [2023-03-28 11:27:17] debug [tunnels::connections::relay_tunnel_host]
  [2023-03-28 11:27:22] debug [tunnels::connections::relay_tunnel_host]
  host relay client session successfully authed
  Forwarded port to 127.0.0.1:4200
  Forwarded port to 127.0.0.1:4200
  EOF from TCP stream, ending
  [2023-03-28 11:27:22] debug [tunnels::connections::relay_tunnel_host] EOF from TCP stream, ending
  [2023-03-28 11:27:32] debug [russh::server::encrypted] handler.channel_close ChannelId(2)
  [2023-03-28 11:27:32] debug [russh::server::encrypted] handler.channel_close ChannelId(7)
  [2023-03-28 11:28:57] debug [tunnels::connections::relay_tunnel_host] Forwarded port to 127.0.0.1:4200
  [2023-03-28 11:28:58] debug [tunnels::connections::ws] received liveness pong
  name: "tunnel" Ok("ssh-connection") Ok("none")
  [2023-03-28 11:29:02] debug [tunnels::connections::relay_tunnel_host] EOF from TCP stream, ending
  [2023-03-28 11:29:12] debug [russh::server::encrypted] handler.channel_close ChannelId(3)
  [2023-03-28 11:29:50] debug [russh:: session] sender_window_size 512597, target 1048576
  [2023-03-28 11:30:58] debug [tunnels::connections::ws] received liveness pong
  [2023-03-28 11:31:00] debug [russh::server::session] break
  [2023-03-28 11:31:00] debug [russh::server::session]
  disconnected

Steps to Reproduce:

1. Start tunnel on remote machine through tunnels extension
2. Access tunnel on local machine through tunnels extension
3. Navigate to Angular project
4. Serve the angular project
5. Navigate to generated URL from Tunnels extension
6. Application will just hang and the connection will constantly connect and disconnect

Notes:
Originally I would get an error for "Error Connecting forwarding to 127.0.0.1:4200, no connection could be made because the target machine actively refused it." Firewall rules allow all ports and connection through for the sake of testing, but it wasn't until i added --host=127.0.0.1 to my launch command that it would allow the connection through. After that is where I ran into the issue of the application infinitely loading or just not loading at all.

[connor4312]

Duplicates #7029