jonah@svr:/etc/cups$ sudo nano cupsd.conf
[sudo] password for jonah:
jonah@svr:/etc/cups$ sudo ss -6 -nltp
State      Recv-Q Send-Q                                       Local Address:Port                                         Peer Address:Port
LISTEN     0      100                                                     :::993                                                    :::*      users:(("dovecot",1449,39))
LISTEN     0      100                                                     :::995                                                    :::*      users:(("dovecot",1449,26))
LISTEN     0      50                                                      :::139                                                    :::*      users:(("smbd",785,31))
LISTEN     0      100                                                     :::110                                                    :::*      users:(("dovecot",1449,24))
LISTEN     0      100                                                     :::143                                                    :::*      users:(("dovecot",1449,37))
LISTEN     0      128                                                     :::80                                                     :::*      users:(("apache2",2217,4),("apache2",2216,4),("apache2",2215,4),("apache2",2214,4),("apache2",2213,4),("apache2",2210,4))
LISTEN     0      32                                                      :::21                                                     :::*      users:(("proftpd",2147,2))
LISTEN     0      10                                                      :::53                                                     :::*      users:(("named",1465,20))
LISTEN     0      128                                                     :::22                                                     :::*      users:(("sshd",1436,4))
LISTEN     0      128                                                    ::1:631                                                    :::*      users:(("cupsd",2629,10))
LISTEN     0      100                                                     :::25                                                     :::*      users:(("master",1646,13))
LISTEN     0      128                                                    ::1:953                                                    :::*      users:(("named",1465,24))
LISTEN     0      50                                                      :::445                                                    :::*      users:(("smbd",785,30))