5 replies to this topic

[maxpower]

I am not talking about forwarding through a router.

Isn't there a method where a PC, behind a firewall, connects to a server and "links" to another PC, that is behind a firewall?

GoToAssist does this as well as many others. I want to write something like this (something very simple).

The first thing that comes to mind is to have a server (somewhere on the internet) that takes connections and "bridges" the two socket connections from the PCs.

Is this how it is done?

Thanks

[Alexander]

I believe you are looking for a VPN (or programming of.)

[maxpower]

Thanks for the response. Unfortunately I can't VPN through the firewall. I won't have access to anything like that.

I need the client computer, that is behind a firewall, initiate a connection out to a server which will bridge a connection to another client computer.

There are lots of programs that do this but I don't know how they do it. I know of a way to do it and that is create a server app that listens to connections and then bridges two clients. I wonder if there are better ways to do that.

[maxpower]

I think this is what I am looking for

How Skype & Co. get round firewalls - The H Security: News and Features

[WingedPanther]

You may want to look at something like Hamachi, where both establish a connection out of the firewall, and can talk to each other via this new connection.

[maxpower]

I have used Hamachi in the past to make it easier for me to maintain family's and friend's computers. Unfortunately, I find it works only 50% of the time. Also, I can't install Himachi on one of the computers. It is not allowed.


Thanks