Sometimes it can be a real nightmare to troubleshoot for what reason applications are unable to connect to services as the client simply gets a “Connection refused”, “Connection aborted” or “Timeout” message back. The image below is a typical view of a log from a wcf client with connectivity issues. This log is basically useless as it gives no reason for the connectivity failure, best one can do is to try and check that the correct address is being called.
In the next slide we can atleast see that the user is attempting “Delegation” by supplying a SPN on the endpoint and we can see to which address the client is trying to connect.
One way to troubleshoot WCF Security connectivity related issues is to add the “serviceSecurityAudit” behaviour to the service behaviours in the service host.
<system.serviceModel>
endpoint security definition download endpoint security consoleTAGS
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