why does dhcpd/ntpd and samba claim to be different as any other network services? there is no interfcace with a ipv6-address, dhcpd is even started with "-4" and netstat says it claims a udp6 high port nobody knows for what

[root@srv-rhsoft:~]$ ps aux | grep 18637
dhcpd    18637  0.0  0.1 109516 18508 ?        Ss   01:15   0:00 /usr/sbin/dhcpd -4 -f -cf /etc/dhcp/dhcpd-guest.conf -lf /var/lib/dhcpd/dhcpd-guest.leases -user dhcpd -group dhcpd --no-pid br1

[root@srv-rhsoft:~]$ netstat -l | grep 18637
udp        0      0 0.0.0.0:67              0.0.0.0:*                           18637/dhcpd
udp        0      0 0.0.0.0:44827           0.0.0.0:*                           18637/dhcpd
udp6       0      0 :::57860                :::*                                18637/dhcpd

[root@srv-rhsoft:~]$ cat /etc/sysctl.conf | grep ipv6
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.all.accept_redirects=0
net.ipv6.conf.all.accept_source_route=0
net.ipv6.conf.default.disable_ipv6=1
net.ipv6.conf.default.accept_redirects=0
net.ipv6.conf.default.accept_source_route=0