Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6
Fixed In:
13.0.0
Opened: Sep 04, 2015 Severity: 3-Major
The pre_established_connections profile setting is used to ensure BIG-IP does not respond to the clients SYN with a SYN-ACK until it receives a SYN-ACK from the server, indicating that the port is open (default value is false). However these statistics are not visible in tmstat.
Unable to see the statistics, network troubleshooting difficulty.
Profiles with pre_established_connections set to true
None
pre_established_connections is exposed in tmm.tcp and tmm.tcp4 as pe_connects. This value is the current number of opened but not fully established connections when using either the Verified Accept or Fast Open TCP options.