Bug ID 630699: Preserve original umask of /etc/hosts file

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP APM(all modules)

Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:

Opened: Nov 29, 2016

Severity: 3-Major


CLI VPN client changes umask of /etc/hosts to 077. After disconnecting from VPN, the umask is not restored back to the original.


It breaks usability of /etc/resolv.conf for OS apps.


CLI VPN client is used to establish VPN connection on Mac/Linux.


An administrator can restore umask of /etc/hosts using system tools.

Fix Information

Now the Mac/Linux CLI VPN client preserves the original umask of /etc/hosts after disconnecting from VPN.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips