My CUPS serv­er and the client are in a jail. I have the fol­low­ing in the cups.conf, but lpstat ‑p ‑a does not give me a list of print­ers with­out using the client.conf:
—snip—
Browsing On
BrowseOrder allow,deny
BrowseAllow 192.168.1.0/24
BrowseAllow 192.168.2.0/24
BrowseAddress @LOCAL
—snip—

And in the “Loca­tion /” section:
—snip—
Allow from 192.168.1.0/24
Allow from 192.168.2.0/24
# Allow shared printing and remote administration...
Order allow,deny
Allow @LOCAL
—snip—

If it mat­ters, both jails have the broad­cast address set to .255 of the /24 net­work they are in (ifcon­fig IF alias 192.168.1.X/32 broad­cast 192.168.1.255).