We have noticed the following error in SQL Server error logs:
The Database Mirroring protocol transport could not listen for connections due to the following error: '10013(An attempt was made to access a socket in a way forbidden by its access permissions.)'.
When we tried to research on the following error code, it has a particular permission issue which Microsoft talks about:
Windows sockets error codes, values, and meanings: http://support.microsoft.com/kb/819124
Translation: Permission denied.
Description: An attempt was made to access a socket in a way that is forbidden by its access permissions. For example, this error occurs when a broadcast address is used for sendto but the broadcast permission is not set by using setsockopt(SO_BROADCAST). Another possible reason for the WSAEACCES error is that when the bind (Wsapiref_6vzm.asp) function is called (in Microsoft Windows NT 4 .0 Service Pack 4 [SP4] or later), another program, service, or kernel mode driver is bound to the same address with exclusive access. Such exclusive access is a new feature of Windows NT 4.0 SP4 and later, and it is implemented by using the SO_EXCLUSIVEADDRUSE option.