Ну де-е-вочка, ну йо-оп твою мать!..
[root@crocs ~]# firewall-cmd --get-services
amanda-client bacula bacula-client dhcp dhcpv6 dhcpv6-client dns ftp high-availability http https imaps ipp ipp-client ipsec kerberos kpasswd ldap ldaps libvirt libvirt-tls mdns mountd ms-wbt mysql nfs ntp openvpn pmcd pmproxy pmwebapi pmwebapis pop3s postgresql proxy-dhcp radius rpc-bind samba samba-client smtp ssh telnet tftp tftp-client transmission-client vnc-server wbem-https
[root@crocs ~]# firewall-cmd --zone=internal --list-services
dhcpv6-client mdns ssh
[root@crocs ~]# firewall-cmd --permanent --zone=internal --add-service=ipsec
success
[root@crocs ~]# firewall-cmd --zone=internal --list-services
dhcpv6-client mdns ssh
[root@crocs ~]#