bofc.pl (own company)

For my own company usage I support my own fleet of servers and developer machines

servers functions

multilevel data backup using raid, zfs, snapshots, own cloud and external data storage
securing computers from attacks from outer world with iptables
providing safe communication with remote servers with openvpn
www server for different tools and monitoring sites with ssl and own ca available only after presenting valid rsa key on nginx
vpn client in network namespace for some applications
automatic monitoring of machines with cron
internet sharing (own router)
dhcp server for local machines
sharing files with samba and nfs
pxe server for diskless machines
dns server for nice local computer naming