As the title says, we have two VLANs at the office, one for authorized users and one for guests. The first VLAN contains some resources that should be only for authorized users, but the printer should be shared. At the moment, all traffic between the VLANs if firewalled, except for the printer's IP. Even though inter-VLAN routing is enabled, the guests can't access it.
If you need more specific info to solve this, please ask.