- One or more published sites may randomly stop being available on the port or ports on which they have been published. For example, a particular Web site may no longer be available on port 80 or on port 443. Or, the Web site may no longer be available on either port.
- One or more events that resemble the following are logged in the Application log:
Event Type: Warning
Event ID: 14149
Event Source: Microsoft ISA Server Web Proxy
User: N/A
Computer: ServerName
Description: Web Proxy filter failed to listen to IP address port 443. The network adapter might not be functional. The error code specified in the Data area of the event properties indicates the cause of the failure. - If you configure tracing in ISA Server, the following information is displayed in the trace file:
18169 [1]688.55c <date time> [ ] [SRV_GENERAL server CFwxListener::StartListenAndAccept FwxListener.cpp@635] Warning:No new accept allowed (may happen when there are many IP addresses and many web listeners), sm_InitListenerParams.MaxPendingAccepts < m_nDesiredPendingAccpets, hr = E_OUTOFMEMORY
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