Connection questions

[Ravenheart]

Hey guys I'm making a small test app that rapidly captures screenshots
of the desktop and sends them over the network. Now when I test
locally in my home network between my two computers, using
"192.168.1.103" as the server IP everything works fine. However if I
try to set the IP to "87.120.1.37" which is my external IP I get this
error:

"Socket Exception was unhandled by user code

The requested address is not valid in its context"

This occurs in the NetBase.cs file, method "public void
Start(IPAddress localAddress)" which is at line 214.


Here is my server implementation, and yes I do know its not the proper
way to do this:
http://pastebin.com/dxJXkrGL

And my client:
http://pastebin.com/V2g2F6t0

I'm 100% sure I've messed up something somewhere, also keep in mind
only one person will connect to the server.

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[Chris Cowherd]

Does your server have a NAT'd address? Is this the public IP of the router that the server is behind?  Or is your computer connected directly to the Internet?

The server can't bind to that address if it is the address of your router.  Just my first guess.

[Ravenheart]

87.120.1.37 is my external IP, the router itself uses 192.168.1.1 and
yes I have forwarded the correct port to my computer(which has a
static internal IP).

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[lidgren]

I agree with Chris. You only need to set the address in the config (or
use the Start(IPAddress) override) if you have multiple network cards
- the external ip will be automatically chosen by the router, it
cannot be chosen.

--michael