Why would I need to DMZ router to scan?

If you feel you have tried everything to get the scanner to communicate with the computer and nothing will do, a service representative can tell you to DMZ the printer.  Often I have heard the term used loosely, and it can be very confusing if taken the wrong way.  That's why I deliberately formulated my question as I did.  First of all, you don't want the router DMZ.  You want to DMZ IP address of the printer in the router to open ports which also insist on remaining blocked.

I considered all the reasons, we'd lose communication with their scanner.  The reasons are plentiful and can leave a user struggling for hours trying to get their scanner to communicate with their computer.  After that a standard troubleshooting is complete, they turn to their router.  Of course, this message only relates to people who have their printers attached to their computer with an Ethernet cable or wireless.  Before I define exactly what means DMZ, first of all I want to look at why you want to do.

Printers to communicate through several different ports.  Often routers are configured with an internal firewall to protect users of computers from outside attacks.  In this way, the only information that the computer receives comes from what the router allows through.  People might DMZ their computer for games purposes, but it would be a very bad idea.  People are misled by "reliable companies," which suggests this in order to access their personal files.  Essentially, the goal was really to contain the amount of traffic actually pass through the router at the same time so this is a feature of security and service.

A printer has been designed to communicate through a series of ports, but sometimes these ports are blocked.  Maybe the router is due for an update, or a firmware update was conducted which could cause the printer to lose communication.  Often, people can still print which is what it makes it even more confusing.  Ports of printing are simple and well known in the world of routers.  However, scanners to operate on a level more complex.  Information is received by a port and another goes out.

Some companies may even install a proxy server in order to reduce bandwidth and record or monitor traffic which is an example of a blocked port.  In addition, as an extra level of protection, routers differ in the configuration so that it is difficult to gain access to a network for malicious purposes.  Depending on the router and other sources of firewall, like on the computer (antivirus software and Windows Firewall), these ports may deny access to a device of 'unknown' otherwise on what seems to be a random basis.  Of course, it is not random, but the timing is always impeccable none-the-less.

DMZ printer (also known as the port forwarding in some cases) would mean completely open all the ports of this device.  It stands for demilitarized Zone.  Open ports in this subnet to the router allows access without any additional security.  That's why doing it on the IP address of the computer is a bad idea because that which allows people outside access to your computer network.  With ports closed here, they are allowed access by the user as a download in an email that contains a virus.

On a printer, there is no way to access the files, install viruses or damage to the printer.  Especially if it's just a home network, the risk of attack is null.  It's not as if they could tap into your network as long as it is password protected initially.  The pirates have honestly no reason to print on your printer, in order to open the ports for access to the printer is perfectly acceptable and safe.  Now, if you were totally to the DMZ the router, then Yes, but a advanced user would know the term, just so the application, expresses or misunderstood is still virtually impossible to do the entire router.  Instead, just follow these steps so that you know that there is nothing blocking the scanner to work.

Because routers differ from a product, a non-technical person would better communicate with their provider internet router service or undertaking for them through the steps on how to do.  Directly into the router just looks like a bad idea if you have never done it before.  Sometimes the router companies will help you for free if you are in warranty, if not the biggest complaint I hear is that they want you to pay xx.xx amount to do what your internet service provider must be able to do it for free.  If you find that you are unable to find someone to do it for free, you can always search the router manual and find information in the title of port forwarding.  However, that information is not openly scattered on the world wide web because of the risk factor to plug the wrong numbers and completely block the communication with the printer.

After I uninstalled the printer, temporarily disabled the startup and anti-virus programs, reinstalled the printer software and find I'm still able to analyze, the next thing I look at is the router.  A technical agent on the phone, I didn't have the right to access the 3rd party software and hardware, that I have been trained, so I sent an email, which included all the ports, the printer uses and at the request of a reminder.  You can just go down the list of ports and follow the instructions on how to open each one individually, or you could just DMZ IP address which opens all ports on the printer.  Seems easier to DMZ it or what is even easier to do just told someone else to do not understand the definition themselves.

As I said, it can be confusing and frustrating, especially if it is beyond your level of troubleshooting, but everyone who has managed to do, so always the spokesperson saying they could analyze now.  9 times out of 10 it worked.  And at that time, he remained effectively resolved.  With regard to the other 10%, they had other issues inside the computer as well.

So, if you are already in this situation, contact your router or your ISP company for how to do this.  Here is the list of ports that I would include in my email, which would also suggest updating the firmware on the router first, and then going on with port forwarding.  This is all from my understanding and experience, I learned this. It's rather simple information that I hope will help you understand why someone would tell you to do.

Incoming (UDP) ports are ports of destination on the computer while outgoing ports (TCP) are ports of destination on the HP printer.

• Incoming (UDP) ports: 137, 138, 161, 427

• Outgoing (TCP) ports: 137, 139, 427, 9100, 9220, 9500

The ports are used for the following functions:

Print

  • UDP ports: 427, 137, 161
  • TCP port: 9100

Download of photo card

  • UDP ports: 137, 138, 427
  • TCP port: 139

Scanning

  • UDP port: 427
  • TCP ports: 9220, 9500

The HP device status

  • UDP port: 161

Faxing

  • UDP port: 427
  • TCP port: 9220

Installation of device HP

  • UDP port: 427

Ports of Web Services

  • UDP and TCP: 80, 443, 5222 and 5223

Hello Ports

  • TCP and UDP: 5353 and 5297, 5298

Tags: HP Printers

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