How universal is UPnP? I use the following with success to create a
connection and get external address on a system using XP Internet connection
sharing. Does it work with a LinkSys router or other commonly used home
setups?
Add reference to NATUPNPLib.dll
using NATUPNPLib;
IPEndPoint external;
IPEndPoint local;
public void PrepareForNAT( int publicPort )
{
NATUPNPLib.UPnPNATClass nat = new NATUPNPLib.UPnPNATClass();
IStaticPortMappingCollection spmc = nat.StaticPortMappingCollection;
// make sure not there
try
{
spmc.Remove( local.Port, "TCP" );
}
catch( System.IO.FileNotFoundException )
{
// ok
}
IStaticPortMapping spm = spmc.Add( publicPort, "TCP", local.Port,
"MyLocalName", true, "id for display" );
external = new IPEndPoint( IPAddress.Parse( spm.ExternalIPAddress ),
spm.External Port );
}
// worth having a Dispose method to do a spmc.Remove( local.Port, "TCP" ) to
clean up...
You can check the results by right clicking internet connection, choosing
properties, and pressing the settings button. It takes a bit of time to
load.
"Thomas Tomiczek [MVP]" <t.tomiczek@thona-consulting.com> wrote in message
news:uv%23YWsu6DHA.3704@tk2msftngp13.phx.gbl...[color=blue]
> A third possibility (if the router supports so) ould be using UPnP to[/color]
query[color=blue]
> for the outside IP address.
>[/color]
[color=blue][color=green]
> >
> > "Demetri" <anonymous@discussions.microsoft.com> wrote in message
> > news:3820EE56-19E2-4E34-806D-3C20CD9BEDDB@microsoft.com...[color=darkred]
> > > How do I find out what the network IP address is?
> > >
> > > For example if I have a cable modem with 68.57.200.50 as the IP[/color][/color][/color]
address[color=blue][color=green]
> > and the linksys router assigns PC's on the network 192.168.1.1 how do I[/color]
> find[color=green]
> > out that the address is 68.57.200.50 running my code on the PC with the[/color][/color]
IP[color=blue][color=green]
> > address assigned to it by the router of 192.168.1.1 ?[color=darkred]
> > >
> > > Make sense what I'm asking? I like using WMI but if there is another[/color][/color][/color]
way[color=blue][color=green]
> > I'm willing to listen.
> >
> >[/color]
>
>[/color]
