I need to enable the office server also as a print server, with the printer connected via usb, but I'm having the exact same problem described in here.
CUPS is running, it's listening on port 631, it's enabled to be accessed from anywhere in the local network, and if I do
curl localhost:631 (or
curl 192.168.0.28:631, the server's IP) it returns the web page to the console. Also, if I do
telnet localhost 631 (or
telnet 192.168.0.28 631) from the server's console it tries to connect (connection is NOT refused, so the port IS open).
I'm trying to connect from a Windows machine, and I'm using a tool called
tcping.exe to check whether port 631 is open. It seems that this port is not accessible.
Please help, I'm running out of ideas :S
I installed the printer on another machine (not the server) and it's working fine, so maybe it's a conflict with another service in the server. The server is running Apache2, MySQL, iRedMail mail server... I don't remember what else.