Bug ID 1603809: [Linux Edge client] DNS is not updated on ubuntu 23.10 when connected to VPN

Last Modified: Sep 05, 2025

Affected Product(s):
APM-Clients TMOS(all modules)

Known Affected Versions:
7.2.4.6, 7.2.4.7, 7.2.4.8, 7.2.5, 7.2.5.1, 7.2.5.2, 7.2.5.3

Fixed In:
7.2.6

Opened: Jul 04, 2024

Severity: 3-Major

Symptoms

-- DNS servers and suffixes config from BIG-IP Network access resource is not updated on Linux system running Linux edge client to connect to the VPN -- "resolvctl status" shows system DNS server and not network access resource DNS servers -- ping to any hostname in the VPN network this does not work as system DNS servers are used instead of VPN server's DNS for name resolution -- "cat /etc/resolv.conf" shows system dns and not VPN dns server

Impact

-- DNS to internal hosts does not work as the Linux system's local DNS servers are used

Conditions

-- Linux f5fpc client is used to connect to the BIG-IP VPN sever -- DNS servers are configured in the network access resource config

Workaround

None

Fix Information

DNS resolution happens via DNS Servers received from BIG-IP after the VPN is connected in Ubuntu OS.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips