Last Modified: Jul 12, 2023
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.6.1
Fixed In:
13.0.0, 12.1.2, 11.6.1 HF2, 11.5.4 HF3
Opened: Sep 20, 2016 Severity: 3-Major Related Article:
K61421029
TCP connections that are pending completion of the three-way handshake are expired based on the absolute value of handshake timeout. For example, if handshake timeout is 5 seconds, then the connection is reset after 5 seconds of receiving the initial SYN from the client.
Connections are expired prematurely if they are still in three-way handshake.
A TCP connection in three-way handshake.
Disable handshake timeout. Impact of workaround: Your TCP handshake will not prematurely timeout and connections remains open until the Idle Timeout expires.
The handshake timeout now expires based on idleness of the connection, taking into consideration of any SYN retransmissions, etc., that might occur.