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ddrLPD Question & Answer

Q: What is LPD?
A: LPD is an acronym from Line Printer Daemon. It's also known as Line Printer Remote protocol. Introduced for the first time in BSD Unix platform. The main purpose for this protocol is sharing the printer resources in a LAN or WAN. An LPD printer is identified by the IP address of the host machine and the queue name on that host. Sometimes, LPD/LPR is referred as TCP/IP printer.

Q: What is "ddr" mean?
A:  Don't get too serious with it. It's just a name.

Q: Which port is used for running this software?
A:  Based on RFC-1179, ddrLPD is using port 515 strictly for accepting any request for LPD/LPR printing purpose. To make this able to run properly, make sure your firewall or any anti virus software is not blocking this port.

Q: What versions of Windows are supported?
A: ddrLPD is running will on Windows 2000, Windows XP, Windows Vista and Windows 7.
Q: What is the different between trial version and registered version?
A: With the registered version, user could interfence the port whether it's need to be opened or closed. User also could set some optional settings such as to run application minimized on system tray or starting it automatically when Windows boots.

Q: I have accepted my license key, what should I do for the next step?
A: Once you get a license key via email, save the attachment to ddrLPD's working folder and then rename it to ddrLPD.key, quit your ddrLPD application and then start again. After that, you can inquiry the license status from info menu.

Q: How to use host permission?
A: ddrLPD now has a feature to limit access to your lpd queue server. You can allow or deny any host. Define it with usual IP4 format such as aaa.bbb.ccc.ddd/xx. Where a b c and d refer to incoming IP node and xx refers to its netmask. You can also define netmask in IP4 format.

Q: Why it's not free?
A: ddrLPD is not free but it's cheap. You can use a free trial version as long as you wish. The trial version is not limited by time and could run properly as registered version does, except some features that mentioned above. When an application is not free, it will energize any authors to make and develop a better application in the future. I think it's fair enough.

Q: What compiler is used to build ddrLPD?
A:  For develop ddrLPD, I used Rapid Euphoria, using David Cuny and friend's Win32Lib and then compiled it using Watcom C/C++.

Q: Where is your contact support?
A: If you meet any problem related to ddrLPD, you can send an email to lpd at ddr.web.id, I will reply any question from you as soon as possible.