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A NAT 3 situation is connecting trough a router and not having the required ports opened or not connected trough the DMZ.

If your ISP (Internet Service Provider) is DSL, it’s essential to have your modem bridged. Using the DMZ of the DSL modem with your network router is also not a guaranteed solution. Your ISP should assist in bridging the modem.

D-Link DIR series routers(DIR-615,DIR-655,DIR-660) are UPnP enabled. If your game console is also UPnP enabled, the router will permit opening ports with the auto configuration from the console.

When the device is not UPnP enabled, manual port setup is required.

Xbox Live requires ports:
· TCP 80
· UDP 88
· UDP 3074
· TCP 3074
· UDP 53
· TCP 53

PS3 requires ports:
· TCP 80
· TCP 443
· TCP 5223
· UDP 3478
· UDP 3479
· UDP 3658 should also be opened for voice chat.

Step 1: Assign your console a Static IP Address on the Network settings. You may chose the IP – / /

Step 2: Open a web browser and type the IP address of the wireless router in the address bar (default is Press Enter.

Step 3: Navigate to the Port Forwarding page in the Advanced tab.

Step 4: Enable and name the rule and type in the IP address of the console. Include the ports with commas and dashes when in range. Or you may create additional rules.

Step 5: Click on Save Settings to apply the rule.

Step 6: Run the Network test in your console.

If Port Forwarding fails, set the IP address of the console in the DMZ page, but remove the previously configured ports.

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D-Link DIR-655 Xtreme N Gigabit Router,I found a online address Emulator:

step1: Enter :,Choose a dir-655 image you want to see.


step 2: Enter the login button ,username is Admin,password is Blank.


step 3: After you enter the  login button,you can see the D-Link dir-655 web control management.

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D4D Technologies is a high tech medical device company offering state-of-the-art 3Ddigitizing applications that take the dental profession to a higher level of productivity, patient comfort and convenience with its E4D Dentist CAD/CAM restorative system. This cutting edge technology enables dentists to scan, design and mill a permanent crown for patients in about an hour, without the need for outside lab work and multiple appointments.


The Challenge

Nobody likes to spend any more time than necessary in the dentist’s chair but having to wait days for a crown is cruel punishment. D4D Technologies, based in the Dallas area, provides state of the art 3D dental imaging system that offers dentists and their patients the convenience of creating permanent crown on demand. This innovative system employs lasers, custom optics, 3D rendering, real-time computing and robotics. It is being utilized by dental practices worldwide, including in the US, Canada, Australia, New Zealand, South Africa, and will be launched in Europe.

E4D system consists of three elements. First, a mobile device with an intraoral scanner (IOD) presents the treatment room. The IOD is an included high-speed computer with proprietary software and a 17 LCD. The dentist uses a tool to draw around a crown preparation necessary to create accurate, real-time digital later for optimum fit.

Next, the digital image of the tooth is sent wirelessly and securely to the job server – a desktop computer that computes a tool path from the scanned data. Finally, the tool path data file is transferred to a milling unit that interprets the image and mills the crown.

The critical link is the wireless connection between the IOD and the job server. A dental office typically has a lot of digital “noise” including electronic equipment, physical obstructions and other interference that can hamper the signal and slow or stop communications. Dentists prefer the IOD unit to be wireless so it can easily be moved throughout the office. D4D requires a powerful, yet reliable wireless solution to assure the system runs smoothly and without interference.

The Solution

“You can design a beautiful tooth, but if you can’t get it to the job server the whole process is moot,” said Mark Lazarow, IT manager of D4D Technologies. Mark consulted with Jeff Romick, Vice President of HBR Technologies, a D-Link reseller also in the Dallas area that specializes in security, mobility and healthcare solutions.

D4D Technologies and HBR Technologies partnered with D-Link to perform a rigorous test of their secure wireless products. “We opted for the D-Link® DIR-655 Xtreme N® Gigabit Router with three antennae because it had better reception, data transmission and failure rate. We paired it with the DWA-160 Extreme N Duo adapter,” he said. “Now the system can handle large file sizes in a complex environment that has a lot of transmission noise. Plus it provides complete security and meets HIPPA (patient privacy) requirements.”

Another key component of the D4D imaging system is providing outstanding customer support. It is critical for the company to be able to access its dentist’s computer via the Internet to monitor in real-time and troubleshoot problems. “We needed a router that would maintain a signal and be reliable so we can access our customer’s computers at any time,” Lazarow said.

“The D-Link routers provide us with a more reliable signal and the transmission speeds are three to four times faster than before,” he said, adding that they have deployed more than 700 D-Link router/adapter combos in dental offices worldwide.

“You just can’t mess around when you have a patient in the chair. You have to be efficient,” said Lazarow. “D-Link helps let our dentists do that.”

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DIR-615 and DIR-655 802.11n  wireless router look similar to the differences? Here I will describe in detail the difference between them.

1: the difference between port

DIR-615: -1 month Mbps WAN port, 4 Fast LAN port support MDI / MDI-X technology.
DIR-655: -1 Gigabit WAN port, four Gigabit LAN port support MDI / MDI-X technology.

2 Transfer rate and the amount of belt machine

DIR-615: up to 100-110M has a transmission rate, with the amount of about 20 sets machine below.
DIR-655: up to 130-140M has a transmission rate, with the amount of about 30 sets machine below.

3: DIR-655 is the world first Vista-certified through the wireless router

Through the DIR-655, users will be able to enjoy the first time, the perfect combination of Vista and network equipment brought many of the new Web experience, and to SMEs and home users of network applications and management to the limit. Vista The breakthrough lies in the establishment of a network of mains mechanism, which will be able to detect the network of certified products, so many complex network infrastructure at a glance. In the past the event of network disconnection occurs, users often need to gradually test failure point of failure, and now through the Internet Explorer network map feature, you can easily find the point of failure lies. In addition, Vista also uses a number of ways to enhance the wireless network, in which network aware feature allows an application aware of the network changes and thereby enables applications to achieve optimization.

Conclusion: Both products are soho products, with high performance, Dlink DIR-655 slightly better, not bad money for a friend who, DIR-655 is the only choice available, signal stability, and rate it faster our greatest strength.

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The DIR-655 Gigabit Router Description:

Strong:D-Link’s Xtreme N® products provide 14x faster and 6x farther range than 802.11g. In simple terms: a noticeably stronger connection at distance.

Reliable:Always on and with no moving parts: set it and forget it.

Easy:D-Link’s Quick Router Setup Wizard walks you through every step of installation, making it easy to create your network!

D-Link:We are proud of our products and value our relationships with our customers. Take a look at the Awards and Testimonials section to read what customers and the experts are saying about our Xtreme N Gigabit Router.

With the DIR-655 Router you can:

*  Enjoy greater Wi-Fi coverage for your entire home or home office at incredible speeds.
* Easily connect computers, game consoles and media players to the internet.
* Share USB devices like printers and storage with all the users on your network with D-Link’s SharePort™ Technology
* Enjoy uninterrupted service with QoS Technology. 

Advanced Network Security

The Xtreme N Gigabit Router supports the latest wireless security features to help prevent unauthorized access, be it from over a wireless network or from the Internet. Support for WPA™ and WPA2™ standards ensure that you will be able to use the best possible encryption regardless of your client devices. In addition, this Xtreme N router utilizes Dual Active Firewalls (SPI and NAT) to prevent potential attacks from across the Internet. Also, the DIR-655 uses advanced firewall features. The web-based user interface displays a number of advanced network management features including:

Secure Multiple/Concurrent Sessions – The D-Link DIR-655 can pass through VPN sessions. It supports multiple and concurrent IPSec and PPTP sessions, so users behind the DIR-655 can securely access corporate networks.

More DIR-655 Gigabit Router Description on

D-Link DIR-655 Gigabit Router Firmware Download:

Now the DIR-655 Firmware version : 1.33NA

DATE: 1/28/2010

 Revision Info:

·Fixed: Correct HNAP issue.
·Fixed: DNS relay issue ( WAN Slowdown )
·Added: Advanced DNS descriptions

Download website: