zone <string> [ <class> ]

[Reese Wang]

I didn't find the format specification of <string> in the documentation here
https://bind9.readthedocs.io/en/latest/reference.html#zone-block-grammar

Can it contain wildcard characters? Will it cause problems if I define
hundreds of zones in the config file?

I'm setting up a forwarding resolver and I want to forward DNS
requests of specific domains to another DNS server instead of the
default one, to avoid DNS polluting.