pfSense

Invalid rules created:

# NAT Inbound Redirects
rdr pass on vtnet0 inet proto tcp from any to 192.168.3.4 port 110 -> 192.168.3.42 port 443
rdr on vtnet0 inet6 proto tcp from any to fc00:3::4 port 110 -> fc00:123::5555 port 443
# Reflection redirects
rdr on { vtnet2  enc0 openvpn WireGuard } proto tcp from any to fc00:3::4 port 110 tag PFREFLECT -> 127.0.0.1 port 19000

Aug 31 15:46:53 pf4 php-fpm[1161]: /rc.filter_configure_sync: New alert found: There were error(s) loading the rules:
/tmp/rules.debug:185: no translation address with matching address family found. - The line in question reads [185]:
rdr on { vtnet2  enc0 openvpn WireGuard } proto tcp from any to fc00:3::4 port 110 tag PFREFLECT -> 127.0.0.1 port 19000

/var/etc/xinetd.conf:

service 19000-tcp
{
    type = unlisted
    bind = 127.0.0.1
    port = 19000
    socket_type = stream
    protocol = tcp
    wait = no
    user = nobody
    server = /usr/bin/nc
    server_args = -w 2000 fc00:123::5555 443
}