API? User "Pubic" IP Address?

Is there an API a developer can use to get session information that Terminal Server does not otherwise provide? I am looking for a way to get the users "Remote Public IP" address so that I can authenticate users in our custom software by their Public IP address.

If not public IP, what about their MAC address?

 

Bump..

 

@JasonR10 At what point do you need this information, during the session or before?

 

During the session.

 

@JasonR10 During the session, published applications have access to extra environment variables that start with the prefix "TUX_", including one that has the MAC address reported to RAS. Make sure you are using the latest 16.5 client otherwise not all the functionality may be available.

If this is not workable, I suggest to file a Feature Suggestion on this forum describing any possible improvements.

 

Thank you, I will experiment with that. That might just work!

 

In my experimenting, this seems to work. However, I did notice that if I start a session from one device then log in from another device and hijack the original session, these Environment variables are not updated to the new client info.

 

@JasonR10 Yes, unfortunately that is a limitation of windows environment variables.

 

Maybe their needs to be a better way these variables are stored / retrieved then. Possibly in a registry key or an API call. Two step authentication for an unrecognized device built in to our software is essential, but we also want users to be able to reconnect to existing sessions. In theory, a hacker could logon to an existing session and their would be no way to know if the MAC address changed.