Event ID 14148 occurs, and client computers cannot communicate with ISA Server after a network outage

• You are running Microsoft Internet Security and Acceleration (ISA) Server 2004, ISA Server 2006, or Microsoft Forefront Threat Management Gateway, Medium Business Edition, on a computer that has only one network adapter installed. This is known as a single-homed configuration. Typically, you use this configuration if the following conditions are true:
  • When ISA Server or Forefront Threat Management Gateway, Medium Business Edition, is located in the internal corporate network or in a perimeter network.
  • Another firewall is located at the edge that connects and protects corporate resources from the Internet.
• A temporary network failure occurs. The network outage lasts for more than three minutes.
• When the network connection is restored, the following event is logged in the Application log:
  Event Type: Warning
  Event Source: Microsoft ISA Server Web Proxy
  Event Category: None
  Event ID: 14148
  Date: Date
  Time: Time
  User: N/A
  Computer: Computer
  Description: The Web Proxy filter failed to bind its socket to IP address port 8080. This may have been caused by another service that is already using the same port or by a network adapter that is not functional. To resolve this issue, restart the Microsoft Firewall service. The error code specified in the data area of the event properties indicates the cause of the failure.
  
  
• When the network connection is restored, the following event is logged in the Application log for Forefront Threat Management Gateway, Medium Business Edition:

  Event Type: Warning
  Event Source: Microsoft Forefront TMG Web Proxy
  Event Category: None
  Event ID: 14148
  Date: Date
  Time: Time
  User: N/A
  Computer: Computer
  Description: The Web Proxy filter failed to bind its socket to IP address port 8080. This may have been caused by another service that is already using the same port or by a network adapter that is not functional. To resolve this issue, restart the Microsoft Firewall service. The error code specified in the data area of the event properties indicates the cause of the failure.

Method 1: Use the Services console to restart the Microsoft Firewall service

1. Click Start, click Run, type services.msc, and then click OK.
2. Right-click Microsoft Firewall, and then click Restart. If you are prompted to stop dependent services, click Yes to enable Service Control Manager (SCM) to correctly restart the dependent services.

Method 2: Use the command prompt to restart the Microsoft Firewall service