squid

pkg install squid
sysrc squid_enable="YES"

/usr/local/etc/squid/squid.conf

auth_param digest realm proxy
auth_param digest program /usr/local/libexec/squid/digest_file_auth -c /usr/local/etc/squid/password
acl users proxy_auth REQUIRED
http_access allow users

http_port 3128

# Leave coredumps in the first cache dir
coredump_dir /var/squid/cache

#
# Add any of your own refresh_pattern entries above these.
#
refresh_pattern ^ftp:		1440	20%	10080
refresh_pattern ^gopher:	1440	0%	1440
refresh_pattern -i (/cgi-bin/|\?) 0	0%	0
refresh_pattern .		0	20%	4320

apache-htdigest -c /usr/local/etc/squid/passwords realm username
# or htdigest if apache-htdigest is not found

squid -f /usr/local/etc/squid/squid.conf -k parse