Forticlient VPN on GNU/Linux: Blank screen


On a Debian GNU/Linux 11 Bullseye box, with the latest updates and with a working NVIDIA graphics card, the Forticlient GUI binary showed a blank-screen with no widgets in it:

The widget-rendering is not working

We did not have Forticlient source code, so we needed […]

I got published twice this year: Admin Magazine #25 and Linux User & Developer #155

Admin Magazine #25: Secure Programming Techniques

In February this year this article came out in the UK, EEUU and Australia. Its main focus is on the different modern protections available for GNU/Linux distributions to prevent malicious users from exploiting software flaws, like stack overflows and the like. Although it is, indeed, quite a […]

/var/log/btmp on Debian Wheezy is always empty (lastb does not show entries)

The issue

Whenever a bad login attempt is made against the Secure Shell daemon on a Debian GNU/Linux Wheezy, only /var/log/auth.log is filled. The file /var/log/btmp is always empty, therefore it is impossible to get the list of failed logins by means of running the lastb command.

Logging to /var/log/btmp is […]