ToDoList (not exhaustive)

Complete iptables role for routers (FORWARD, NAT, ...).
Complete sysctl customizations role for routers (forward) and RA.
Create Icinga2 server (conf hosts) and clients roles.
Add a pre-task which can install python-apt, gentoolkit or python-yum if not installed (with shell module).
Add roles for different function:
- DNS authority
- DNS resolvers
- OpenVPN server
- Wireguard server (or tinc ?)
- BGP router
- LDAP server
- DOH server
- Weechat + IRC Relay
- Build server (Gentoo builds)

More...

Role munin-async: add possibility to deploy multiple SSH keys (if multiple Munin server).
Role munin-node: add some plugins / custom configurations for more details.
Role icinga2_server: add hosts.conf and hosts files via ansible (and not manually)