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The GTM/DNS HTTPS monitor may fail to find the configured receive string in a HTTP response, causing the monitored service to be incorrectly marked down.
A service is incorrectly marked down. This can cause the BIG-IP GTM/DNS to return a suboptimal answer or no answer at all to DNS queries.
This issue occurs when all of the following conditions are true: -- The server being monitored performs an unclean shutdown of the SSL session (the underlying TCP connection is closed without first issuing a close notify alert at the SSL level). -- The server's HTTP response does not terminate with a newline.
This issue can be worked around by performing any one of the following actions: -- Ensure the server issues a close notify alert before it closes the underlying TCP connection. -- Ensure the server's HTTP response ends with a newline.
The GTM/DNS HTTPS monitor no longer fails when the SSL peer performs an unclean shutdown.
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