And on my router at home.
Neat! What are you using for router hardware? I've done this as well. I used a desktop with ethernet and wifi expansion cards for several years, and then moved to a PC Engines apu2c2 <http://www.pcengines.ch/apu2c2.htm>. It seems like you have a good set of system administration skills, as indicated by at least these statements:
I ended up with Arch on my rented server as well. I am also providing hosting services on that server to a small group of customers I have been a co-maintainer of [php56] ever since and tried to push the security releases out as quickly as possible. I am providing hosting services for customers I am also acting as an email service provider for my customers (and for myself too). Apart from maintaining the mentioned packages I am also quite capable regarding server and service hosting and happy to assist in maintaining and improving the Arch Linux infrastructure. :)
Do you monitor PHP-related security issues? It sounds like you do, and if you're providing hosting services to customers, you probably should be. :-) Do you have any interest in sharing that knowledge by volunteering for the Arch CVE monitoring team <https://wiki.archlinux.org/index.php/Arch_CVE_Monitoring_Team>? Nobody is specifically monitoring PHP issues. —Jeremy