Bug ID 481020: Traffic does not flow through VPN tunnel in environements where proxy server is load balanced

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP APM(all modules)

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3

Fixed In:
12.0.0, 11.6.0 HF4, 11.5.1 HF6, 11.4.1 HF9

Opened: Sep 25, 2014
Severity: 3-Major
Related AskF5 Article:


VPN will appear to be established but no traffic will flow through the VPN tunnel.


No traffic flows through VPN tunnel.


VPN is established through proxy server. DNS returns different IP address for subsequent name resolution query for proxy server.


Use IP address for proxy server instead of name.

Fix Information

Resolved intermittent routing table issue that caused Traffic not to flow through tunnel if proxy server is load balanced.

Behavior Change