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Zielcomputer die Verbindung verweigerte [2404:6800:4008:c02::7d]:5222
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Maciej #1
Member since Jul 2012 · 12 posts
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Subject: Trying to connect via 5222 and failing while using IPv6?
Hi Alex,

I am running into another problem. Users that have IPv6 activated on their Windows machines run into the following Exception while connecting to Google Talk from time to time.

[09:42:14.000 D] [ Sharp Messenger] Messaging socket error 'System.Net.Sockets.SocketException (0x80004005): Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte [2404:6800:4008:c02::7d]:5222
   bei System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   bei agsXMPP.Net.ClientSocket.EndConnect(IAsyncResult ar) in c:\Users\<user>\Desktop\HB\Plugins\Sharp Messenger\agsXMPP\Net\ClientSocket.cs:Zeile 241.'.

I am asking myself whether setting the port explicitly like follows may cause this?

xmppConnection.Port = 5222;

Shouldn't the port be in hexadecimal for IPv6? In the exception above it is logged as decimal.
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Alex #2
Member since Feb 2003 · 4327 posts · Location: Germany
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Ports are not different with v6. Also agsXMPP should support v6 fine.
Do you have a full stacktrace?

Alex
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Maciej #3
Member since Jul 2012 · 12 posts
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That's all output I am getting.
How do you force Windows 7 to use IPv6 for debugging? I used http://support.microsoft.com/kb/929852/de but it seems that all my queries and connection run via IPv4.
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Alex #4
Member since Feb 2003 · 4327 posts · Location: Germany
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The IP adress is retrieved from the DNS server. When your DNS server supplies a v6 address and the OS supports v6 then agsXMPP tries to connect on v6 of course.
But as the error message sais it was not able to. So either your provider or the network infrastructure is not v6 compatible, or the DNS supplied a wrong address.

Alex
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