|Whether to perform hostname verification
The syntax of the list is a sequence, separated by newlines or
no-check actions, along with a CIDR
all. When an CIDR IP range
has the setting
hostname verification will be done; if it has the setting
check, hostname verification will be
performed. Hostname verification is performed on all addresses by default.
Only IPv4 and IPv6 addresses are recognized by the filter, meaning that
hostname verification will still take place for other addresses. The
filter will apply the first rule it finds in the sequence.