Install ocserv on FreeBSD
Installing ocserv with pkg
pkg install ocserv
Load kernel NAT at startup
Add the following to /boot/loader.conf
ipfw_load="YES"
ipdivert_load="YES"
net.inet.ip.fw.default_to_accept="1"
Enable firewall and NAT support
Add the following to /etc/rc.conf
gateway_enable="YES"
natd_enable="YES"
natd_interface="hn0"
firewall_enable="YES"
firewall_type="OPEN"
Where hn0 is the name of your network interface
Starting ocserv
/usr/local/sbin/ocserv -c /usr/local/etc/ocserv/ocserv.conf -f -d 4
Starting with service ocserv start may result in an error:
exec ocserv-worker failed No such file or directory on freebsd
Starting directly with the command line parameters above should work.
References
https://gitlab.com/openconnect/ocserv/-/issues/405