Cannot listen to port on ALL interfaces "0.0.0.0"

I found that you cannot do a ForwardedPortLocal/Remote if the bound host is set to "0.0.0.0" or IPAddress.Any.ToString().
The .NET will throw an exception.

I think your problem is in the ForwardedPortLocal:InternalStart() method. I think when you create the IPEndPoint you should do:

IPEndPoint ipEndPoint;
if (this.BoundHost == IPAddress.Any.ToString()) // Or however you want to compare
ipEndPoint = new IPEndPoint(IPAddress.Any, (int) this.BoundPort);
else
ipEndPoint = new IPEndPoint(DnsAbstraction.GetHostAddresses(this.BoundHost)[0], (int) this.BoundPort);

Similarly, the constructor, ForwardedPortRemote(string boundHost, uint boundPort, string host, uint port)
creates the IPAddress of the bound host exaclty the same way, by calling Dns.GetHostAdresses().

I am not sure if you did this on purpose to try to NOT support IPAddress.Any, however, it is clear there are cases when this is needed, and in fact other libraries (SecureBlackBox) support it.

I see you allow boundHost to be string.Empty, but shouldn't then you be doing the conversion to IPAdress.Any directly?

Inizia con ForwardedPortLocal:InternalStart() e il costruttore ForwardedPortRemote(string boundHost, uint boundPort, string host, uint port), quindi esamina come DnsAbstraction risolve l'host associato prima di creare un IPEndPoint. La modifica è completata quando il forwarding accetta "0.0.0.0" e un host associato vuoto senza l'eccezione .NET segnalata.