D-Link Xtreme N Dual Band Gigabit Router DIR-825

Set-up and design

We didn't experience any problems setting up the D-Link DIR-825. The router comes with a CD that contains the D-Link Router Quick Setup desktop software. Dutifully following the wizard, we were able, with minimal mouse clicks, to get everything up and running, including connecting to the internet and other wireless clients, as well as setting up an SSID for each frequency. Alternatively, you can use the web-based interface, which we found to be well-thought-out, responsive and more comprehensive than the desktop application.

The DIR-825 looks just like the DIR-655, minus the third antenna. The two antennas, however, are still attached to the back of the router where all the ports reside. This is a cluttering and long-standing design trait found in all D-Link's Wireless-N routers. Nonetheless, with the omission of the middle antenna, it's much easier to get to the DIR-825's ports than the DIR-655's.

Like most D-Link routers, the DIR-825 is wall-mountable and also comes with a detachable base for it to work in the vertical position.

The router has an array of LED lights on the front that show the status of the network port on the back as well as that of the wireless and internet connection. On one of its sides, there's a Wi-Fi Protected Setup (WPS) button that helps quickly connect WPS-enabled clients to the wireless network.

Features

Despite similarities in appearance, the DIR-825 is much more advanced than the DIR-655. It's the second router from D-Link that supports true Wireless-N dual-band, capable of broadcasting simultaneously in 5GHz and 2.4GHz frequencies. (The first was the DIR-855, which we reviewed earlier this year). The DIR-825 is the first, however, to feature the SharePort technology that allows the router's USB port to work as a networked USB port. SharePort comes with a software application called SharePort Network USB that you'll need to install on your networked computers. The software lets the computer recognise a USB device plugged into the router as if it were plugged directly into the computer's USB port. Unlike other USB-equipped routers that support only printers and external hard drives, SharePort lets the DIR-825 share virtually any USB device over your network.

SharePort does have a drawback. By making the router's USB port work the same way as one on a computer, only one PC can access a USB device plugged into the router at a time. So, if one person is using an external hard drive that's plugged into the router, others won't have access to it. This makes it a bit less appealing than the NAS feature (as found in the Linksys WRT610N), where a hard drive can simultaneously be accessed by multiple computers.

We tried the Seagate FreeAgent Xtreme external hard drive with the DIR-825's USB port and the moment we plugged it in, the SharePoint Network USB utility on all the computers on the network prompted that a new device has been plugged in and asked if it should connect to it. Once we selected the computer and connected to the drive, the utility on other computers showed that the hard drive had been taken and gave an option to message the host computer to release it, which would happen if the user at the host computer agreed. We were also able to share that hard drive (as though it was connected to the computer directly) and made it available for the rest of the network to access at the same time, the same way you would share a folder on that computer. This seems to be a workaround for the above-mentioned weakness.

Like other D-Link USB wireless routers, the DIR-825's USB port supports Windows Connect Now, another quick way to connect wireless client to the network by using a USB thumbdrive to transfer the encryption key. Last but not least, the USB port can also support a 3G USB adapter to provide access to the internet. This allows for the DIR-825 to work as a mobile router as well as a regular broadband router.

Other than that, the DIR-825 offers numerous network features found in other Wireless-N routers from D-Link and a very well-organised web interface. You can set up manual port forwarding — where you map information coming to a certain port to a certain computer in the network — or use the router's preset settings for different applications and services such as instant messengers, BitTorrent, IP phone software, virtual servers, and so on. It also offers a comprehensive set of parental control tools including Network Filter, Access Control, Website Filter, and Inbound Control. These tools allow you to control the network and limit access to the internet by specific criteria, for instance you can set a computer to only allow access to instant-messenger services during a certain period of time. The router also lets you customise its firewall to allow some services but not others.

Like the DIR-855, the DIR-825 also comes with an interesting and useful feature called Guest Zone. Guest Zone lets you create up to two separate wireless networks (one in 2.4GHz, one in 5GHz) to be used by guests or the open public. Any wireless client connected to these guest networks get access to the internet, but not your local LAN resources.

Performance

We tested the DIR-825 in both frequencies that it supports and found mixed performance. On our maximum throughput test, the router did well for itself in registering 102.4Mbps and 70.2Mbps for 5GHz and 2.4GHz frequencies, respectively. Both scores are above the average we've seen for Draft N routers and on par with the DIR-855.

On our range test, however, the DIR-825 trailed significantly behind the DIR-855 and finished behind the competing Linksys WRT610n. Still, the DIR-825's scores were above the average among dual-band routers we've tested.

What disappointed us the most was the router's mixed-mode score. We conducted this test only in 2.4GHz (there is no mixed mode for the 5GHz frequency), and the router was set to support all Wi-Fi standards, including 802.11b, 802.11g and 802.11n. At 39.8Mbps, it was the slowest among Wireless-N routers we've reviewed this year. To put this in context, the 2.4GHz-only Linksys WRT310N more than doubled the DIR-825 throughput with a 95.3Mbps. To the DIR-825's defence, it was tested with both frequencies being supported at the same time.

Nonetheless, the DIR-825 proved to be a stable and smooth performer throughout testing. It offers the range of about 80m for the 2.4GHz frequency and about 70m for the 5GHz frequency. In our test environment (which is not optimal for range), some other routers can offer range up to 90m or further.