Bug ID 1135313: Pool member current connection counts are incremented and not decremented

Last Modified: Mar 30, 2024

Affected Product(s):
BIG-IP LTM, TMOS(all modules)

Known Affected Versions:
12.1.6, 13.1.5,,,,,,, 15.1.7, 15.1.8,,,,,,,,,

Fixed In:
17.1.0, 16.1.4, 15.1.9

Opened: Aug 09, 2022

Severity: 3-Major


With a certain configuration the connection counts on a gateway pool may increment and not be decremented.


The connection counts are inflated.


- A gateway pool with more than one member. - Autolasthop disabled. - A pool monitor with a TCP monitor where the pool member responds to the TCP handshake with data. Common services that do this are SSH, SMTP, and FTP.


- Configure autolasthop. - Configure a receive string on the TCP monitor.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips