Why is Avahi installed?

[tphz (iptom)]

@dr_techno

routerOS

What do you mean when you write routerOS?

Avahi is not an add-on installed by default on a new IPFire installation.

Do you have read the following pages?

avahi

Problem removing "avahi" via PAKFIRE

That looks like you have samba installed and that requires avahi to be installed. Avahi is also a dependency if you have cups installed for printing. Leave it in place.

Regards