The Perl 5 module Net::CIDR::Set represents sets of IP addresses and allows standard set operations (union, intersection, membership test etc) to be performed on them. In spite of the name it can work with sets consisting of arbitrary ranges of IP addresses - not just CIDR blocks. Both IPv4 and IPv6 addresses are handled - but they may not be mixed in the same set.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.