I ran into some troubles with the IPSec Services on my Windows XP SP2 machine today. This service was needed by a VPN application that I installed to connect to one of our customers. But during the last re-install of my machine, I set this service to manual startup, and now when I tried to start it It could not start. I recieved the following error message when trying to start it:
Error message 10048: Only one usage of each socket
address (protocol/network address/port) is normally
permitted.
The Event Viewer displayed the following:
Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7023
Date: 2006-09-11
Time: 10:08:10
User: N/A
Computer: LAPTOPWW
Description:
The IPSEC Services service terminated with the following error:
Only one usage of each socket address (protocol/network address/port) is normally permitted.
To find out which application that used the ports that the IPSEC Services needed I started up a command prompt and used netstat, as below, to find out the PID of the process. This command below will display all the active UDP connections and the PID (-o). The findstr function searches the output from the netstat and shows the lines containing the text "500" - which is the UDP port the IKE uses.
c:\> netstat -p UDP -n -a -o | findstr 500
UDP 0.0.0.0:500 *:* 316
UDP 0.0.0.0:4500 *:* 316
Using the Task Manager I found out that PID 316 was used by the Cisco VPN Service and I shut it down and then IPSEC services started fine!
