The system logs failed H323/SIP registration requests. Multiple failed attempts can lead to the extension and/or IP address being blocked from further registration attempts for 10 minutes.
Blocking applies as follows:
Blocking Method
Description
Extension Blocking
Registration attempts to an existing extension using the wrong password are blocked for 10 minutes after 5 failed attempts in any 10 minute period.
IP Address Blocking
Registration attempts to a non-existent extension or using the wrong password of an existing extension are blocked for 10 minutes after 10 failed attempts in any 10 minute period.
