|Saturday, 29. January 2022||Week 04|
After switching my Debian hosts from Quagga to FRRouting, I noticed that running vtysh has become quite a bit slower especially when making multiple calls to it from my status/monitoring scripts.
This has also been observed by other users of FRRouting (there's an open issue in their bugtracker: #7799).
The Prometheus frr_exporter works around this by directly sending commands to the UNIX sockets of the FRR daemons (PR).
To use the same approach in my monitoring scripts, I wrote a small utility which acts as a drop-in replacement for vtysh and sends the commands directly to the UNIX sockets of the FRR daemons: vtysock
By skipping the parsing and validation checks done in vtysh, vtysock can achieve a significant speed improvement when executing commands.
|21:38 | Networking | Permalink|
|Sunday, 23. January 2022||Week 03|
|.: Force SSH to use IPv6|
In situations where IPv6 connectivity performs better than IPv4, you might want to force SSH to use IPv6. In interactive mode this can be achieved with the
-6 commandline parameter.
But in situations where you can't modify the commandline parameters a different approach is needed (for example in rsync backup scripts which use SSH as underlying transport layer).
We can use the ssh_config file to encforce that IPv6 is used for a specific host:
This instructs all SSH commands to use IPv6 when connecting to myipv6host.
The same approach also works to force usage of Legacy IP by specyfing
inet as address family.
|10:53 | Networking | Permalink|
|Wednesday, 19. January 2022||Week 03|
|.: Google Analytics removed|
After running it for a bit more than a decade, I've now removed again the Google Analytics tracking from this site. It does not feel appropriate anymore on a personal website.
At the moment no alternative statistics solution is in place yet, but I could imagine setting up a self-hosted solution like Matomo or Plausible in the future.
|22:45 | Webdesign | Permalink|
|.: Google Analytics declared illegal in the EU|
Google Analytics declared illegal in the EU.
|20:45 | Webdesign | Permalink|
|Wednesday, 5. January 2022||Week 01|
Wordle seems to be the trending topic these days.
It's a word game similar to the french Motus game show (resp. the american Lingo game show).
Wordle 200 4/6
|07:09 | Misc | Permalink|
|Saturday, 1. January 2022||Week 00|
Turns out that signed 32-bit numbers can be exhausted long before Y2038, when you use them to store time in YYMMDDHHMM format. (via)
|21:48 | Coding | Permalink|