Centos users, I new to Centos 7 and my problem is the following: I am using my Centos 7 system as a print server in a warehouse. Using cups for the print queue's. Which I can print to the printers find from the Centos 7 machine. The hosting system is Sco Unix using lpd printing. This machine is in Illinois and the warehouse / Centos 7 machine is in Arizona. I have loaded "cups-lpd" using yum and it seems fine. I have also setup "/etc/xinetd.d/cups-lpd" Following is a "netstat -tanp |grep -i listen" tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1090/sshd tcp 0 0 0.0.0.0:631 0.0.0.0:* LISTEN 1096/cupsd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1671/master tcp6 0 0 :::515 :::* LISTEN 1095/xinetd tcp6 0 0 :::22 :::* LISTEN 1090/sshd tcp6 0 0 :::631 :::* LISTEN 1096/cupsd tcp6 0 0 ::1:25 :::* LISTEN 1671/master I notice that "port 515" is only listening on tcp6 not tcp. Question: could this be my problem? and how can I get "port 515" to be listened to on tcp? my Sco Unix print queue "status" file says "waiting for gate to come up". I have had the local hardware person verify that the router is "port forwarding" port 515 to my Centos 7 system. Help in this matter would be greatly appreciated. Thanks, Shawn