Network printer and firewall issue

[j773303]

Does anyone has the experience about whose port shoud be open by firewall while using networking printer in HPUX ?

Thanks,

[Bill Hassell · Accepted solution]

There are many, many network printing solutions so I'll summarize the two most popular methods:

lpr/lpd -- known as 'remote printers' in SAM terminology. The printer is connected to another computer and you send the print job to the remote computer. This is also the method that non-HP network cards use. The port is 515.

JetDirect LAN cards -- known as 'network printers' in SAM. These are made by HP and are either built into the printer or are in an external HP adapter. The ports are 9100, 9101 and 9102.

Note that commercial firewalls already have presets for lpr/lpd and HP JetDirect ports. Note also these protocols for WAN printing are completely unsafe. Any hacker can see the print job so you should never print any data that you could not post in an open web page.

For secure printing, you'll need to use a VPN.