Last Modified: Sep 14, 2023
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4
Fixed In:
15.1.0
Opened: May 09, 2019 Severity: 4-Minor
Currently, the serverside connections in TIME_WAIT state are reused for new serverside connections (by default) before TIME_WAIT expires. A mechanism is required to disable reusing the TIME_WAIT connections if needed.
BIG-IP system behavior on reusing TIME_WAIT connections is configurable based on the tmm.reuse.ss.timewaitconns sys db. tmm.reuse.ss.timewaitconns: enabled (the default) -- A new serverside connection request comes for a TIME_WAIT serverside connection. -- Connection is reused. tmm.reuse.ss.timewaitconns: disabled - A new serverside connection request comes for a TIME_WAIT serverside connection - "Port in use" error is returned
A new serverside connection request is made that matches an existing TIME_WAIT connection and connection is reused.
There is no workaround at this time.
A mechanism to enable/disable reusing TIME_WAIT connections on serverside is provided via a sys db.