I think that it's depend on printer manufacturer.
ie. for HP pinters I have alloved jet-direct but also it need by dependencies snmp-base and snmpv1.
I can recomendate to make security rule that allow all traffic, and after few hours/days please take a look into traffic log from this security policy and You will know what aplication whas recognised. If there isn't a unknowntcp/udp that mean that every aplication was recognised.
Hope that it help You
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