![]() ![]() One way is to setup corporate VPN access allowing secure connections to internal network. communications, all other ports are blocked. Meaning you can only establish FTP, SSH, HTTP, POP3. Additionally corporate firewall will only allow certain traffic from your office PC to remote hosts. S is of course huge problem if you have to access your work materials on office PC from your home. Meaning you can contact remote hosts on Internet from your office PC and they can respond, but remote computers can't initiate connection to your office PC. Firewall will not allow any traffic originating from Internet to internal networ Step #1:ĭownload and install the SocketXP Client from the download page.As shown on the picture above, we have our office PC behind very restrictive corporate firewall connected to Internet. ![]() Interestingly, SocketXP offers a free tier of service for beginners and developers.įollow the below steps to make the nodejs web application behind a NAT router accessible from the internet, using the SocketXP Remote Access solution. SocketXP creates a secure SSL based reverse proxy tunnel. Source (Local IP: 10.1.1.1) => NAT => Internet => NAT->Destination (Local IP: 192.168.1.1) Solution:Ī simple and easy way to solve this tricky problem is to use a simple and easy to use remote access solution like SocketXP. What if the Source is also behind a NAT and wants to access the Destination behind another NAT ? Otherwise, it is not possible to establish a Reverse SSH Tunnel from the Destination to the Source. The only problem with this approach to access the Destination behind a NAT router is that the Source needs to have a public IP address. $ ssh -fNT -R 20022:localhost:3000 įrom the Source, access the nodejs web application running in the Destination behind a NAT router, as follows: $ curl Problem: We can use the Reverse SSH Tunnel port forwarding feature to access the web application. Res.writeHead(200, ).listen(3000) //the server object listens on port 3000 Let’s use the following simple nodejs web application for the demo. Note: You could use the same procecure discussed below to create a reverse SSH proxy tunnel to remote access any TCP service (SSH, SMTP, MQTT, VNC etc) running in your local network or local server. Let’s say the web application listens on TCP port 3000. Let’s say you want to access a nodejs web application running in the Destination behind a NAT router. $ ssh -p 20022 How to create a Reverse SSH tunnel port forwarding ? Now you can SSH into the Destination behind NAT from the public Source via the Reverse SSH Tunnel endpoint ( port 20022) created in step 1. This is called SSH reverse proxy tunneling. For this you need to create an SSH tunnel from the SSH client to the SSH server, so that the client and its network can be accessed via the tunnel. Sometimes, you may want to access a SSH Client behind a NAT router, from a public SSH server. Normally, an SSH client would connect to an SSH server for SSH access.īut if you want SSH access to the SSH client from the SSH server? That’s when you setup a SSH reverse proxy tunnel. ![]()
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