Last Modified: Aug 08, 2019
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Known Affected Versions:
14.1.0, 188.8.131.52, 184.108.40.206, 220.127.116.11, 18.104.22.168, 22.214.171.124, 126.96.36.199, 15.0.0, 15.0.1
Opened: May 06, 2019
When reusing a serverside TIME_WAIT connection, the BIG-IP system: -- Establishes the new connection if clientside/serverside connections are on the same TMM. -- Sends a RST 'Unable to obtain local port' if clientside/serverside connections are on different TMMs.
BIG-IP system behavior is inconsistent. In one case, BIG-IP establishes the connection. In the other case, BIG-IP resets the connection.
This happens in two scenarios: Scenario 1: -- A new serverside connection is requested that matches an existing TIME_WAIT connection (e.g., by using source-port preserve-strict in the virtual server) -- Clientside/serverside connections are on the same TMM. Scenario 2: -- Clientside/serverside connections are on different TMMs.