Category: NetworkIng

  • TP-Link TL-WA701ND review

     

    Wireless access points can be really handy devices – they can solve a number of problems such as connecting a PC/device without a wireless card to the network, creating a network bridge or extending your network. This TP-link, at around $30, offers quite a bit of potential for not a lot of money.

     


    tp-link-wireless-access-point

     

     

     

     

    Physically it’s quite a small box with a single LAN port in the back:


    tp-link-rear

     

    You can also see the power point on the left and the recessed reset button on the right. There’s a single antenna which can be bent into a variety of positions. It does come with a Power over Ethernet adapter, though, which is a nice inclusion for the price – this means that you aren’t limited to placing this device near a power point as you can feed power into the Ethernet line going into it instead!

     


    tp-link-poe-adapter

     

    It uses the regular power brick so nothing else is required to get POE going. On first boot the TL-WA701ND has the default IP address of 192.168.1.254, so if you’re using a different IP address range (e.g. 10.1.1.x) you’ll have to change a device to be able to log in and change the static IP of the device to match your own network. The default login is admin/admin – don’t forget to change this! Once you log in you should see the following screen:

     


    tpLink-01

     

    The TL-WA701ND defaults to Access Point mode, as you can see. If you need to you can jump straight to the Network menu to change the IP range:

     


    tp-link-lan-page-05

     

    Replace 10.1.1.x with whatever IP address you require. Click save, reboot the router, put your computer back to your usual IP address range and log in again:

     


    tp-link-02

     

    Easy done. On the same screen at the bottom you can see traffic statistics:


    tp-link-03

     

    Now on to the Wireless menu:

     


    tp-link-wireless-menu-06

    The Wireless settings default to the following:

     


    tp-link-wireless-settings-07

     

    Your choices of Mode are Access Point, Multi-SSID, Client, Repeater, Universal Repeater and Bridge with AP – quite a flexible range of options! The other important page for setting this device up is the Wireless Security page:

     


    tp-link-wireless-security-08

     

    While I certainly wouldn’t encourage anyone to use WEP when WPA2 is available it can sometimes be handy for non-mission-critical situations where you have to connect devices which don’t support WPA. If your devices do support WPA, though, it’s a much more secure protocol and is the better choice. Also on the topic of security, you can filter access by MAC address:

     


    tp-link-wireless-mac-filtering-09

     

    If you’re looking for more control over the wireless aspect of the device, there’s an advanced menu for Wireless settings:

     


    tp-link-wireless-access-point-10

     

    Most users won’t have to touch this, however. Moving on down the menu, we can see our DHCP settings:

     


    tp-link-dhcp-11

     

    It picks reasonably sensible ranges by default. The System Tools menu is next, and contains the following:

     


    tp-link-system-tools-12

     

    SNMP is a nice inclusion for home enthusiasts or businesses who want/need to keep track of their devices. Another interesting function is the Ping Watch Dog Utility:

     


    tp-link-ping-watchdog-14

     

    I doubt most people would use it but someone may find it useful! Probably more useful is the Wireless Statistics, which shows each connected device’s usage:

     


    tp-link-wireless-statistics-15

     

    So, that’s what the OS has to offer – so how does it perform? For this test we used iperf on a laptop attached to the TL-WA701ND in Client mode, simulating a device which lacks a wireless card being added to the wireless network. The wireless network was broadcasted from a Fritzbox 7390 through one wall about 5 meters/15 feet away. The laptop is a current-generation HP Folio 13 Ultrabook. The test was ran three times and the average result taken. So how did it go?

     


    tl-wa701ND-throughput

    26.9Mb/s. That may not sound like a lot when compared to the theoretical max of 150Mb/s, but now look at the graph when we include the speeds we reached when using the laptop’s own Intel Wireless N card:

     


    tp-link-vs-laptop

    The laptop only achieved 19.9Mb/s in the same situation – meaning that the TL-WA701ND outperformed it by around 35%. For the princely sum of around $30, you can’t really complain about performance like that. Definitely more than enough for web browsing/Youtube and light file sharing duties, and having power-over-ethernet available out of the box is a useful addition that increases the flexibility in terms of placement. If you need an inexpensive way of getting devices onto your wireless network, this little device is definitely worth considering if you don’t need a lot of throughput.

  • Ubiquiti EdgeRouter Lite Review: Part 1

     

    The EdgeRouter Lite is Ubiquiti’s latest router with some pretty high-end features at an entry-level price. The tagline is “The world’s first sub-$100, one million-packets-per-second router” – US dollars, of course. It retails for around $140 Australian.

     

    ubiquiti-edge-router-lite

     

    The first part of the review is going to focus on the actual unit itself, the second on the software and performance. The box itself is reasonably innocuous – matte black plastic with ventilation holes top and bottom. It is quite light in the hand – under 300 grams – and around 20x9x3cm. One interesting thing on the box is the testing date is clearly marked on the top:

     

    ubiquiti-edge-router-lite-box

     

    Having the engineer’s name is a nice marketing touch – giving the impression that someone has personally tested this unit. This might be the case with every other product out there but few draw attention to it. Inside the box itself is the unit itself, a charge cable, a quick setup guide, some wall-mount screws and… that’s it. While there is a console port on the back Ubiquiti don’t provide you with a cable with which to access it – not surprising given the price point. Looking at the unit itself again:

     

    ubiquiti-edge-router-lite-front

     

    On the left there is a clearly marked console port, followed by the ethernet ports 0, 1 and 2. It’s nice that they’re clearly labelled, and the speed indicator colours are also quite clearly marked. On the far right hand side we see the reset button:

     

     

    ubiquiti-edge-router-lite-info-and-reset-button

     

    Looking at the other side we’re greeted by, well, not much. Some faux ventilation holes, the power connector and a ground screw.

     

    ubiquiti-edge-router-lite-rear

    ubiquiti-edge-router-lite-power-and-ground

     

    Speaking of power, the power brick is a mere 1A and is reasonably small:

     

    ubiquiti-edge-router-lite-power-brick

     

    The brick uses a cloverleaf connector.

     

    ubiquiti-edge-router-lite-base

     

    On the underside we have the wall mounting holes, four rubber feet and some ventilation holes. The feet give the chassis a few mm of breathing space:

     

    ubiquiti-edge-router-lite-feet

     

    That’s it for the outside of the box – stay tuned for Part 2, where we look at the OS and what this little box can do!

  • Setting up one browser remotely, one locally

     

    As a follow-up to the Firefox and Internet Explorer remote browsing articles we were asked whether you could set IE up for remote browsing and Firefox for local browsing. This certainly can be done – set up your tunnel in Internet Explorer then open up Firefox and go to:

     

    Tools -> Options -> Advanced -> Network -> Settings -> select No Proxy

     

    Firefox should now work locally again.

  • Using an SSH tunnel with Internet Explorer

     

    As a follow-up to the previous article on how to browse the web via an SSH tunnel in Firefox we’ve been asked to show how to do the same with Internet Explorer. The Putty set-up remains the same; once that’s complete, open Internet Explorer (we are using IE 9) and go to Tools -> Internet Options (you may have to hit Alt to bring up the top menu):

    remote-access-ie-01

    Go to Settings:

    remote-access-ie-02

    Choose LAN settings:

     

    remote-access-ie-03

    Tick “Use proxy server for your LAN” and click Advanced:

     

    remote-access-ie-04

    Make sure the top four lines are blank in all fields except for the SOCKS port – here put:

     

    127.0.0.1

     

    and the port we used in Putty:

     

    2048

     

    Make sure the “Use the same proxy server for all protocols” box is unticked.

     

    Hit OK -> OK -> Apply -> OK, open up your SSH tunnel in Putty and you should be ready to browse the internet remotely!

  • Ubiquiti Edge Router Lite teaser…

     

    We’ve been looking forward to this little box for a while and now have one in for testing:

     

    ubiquiti-edge-router-lite-logo

    Stay tuned for a two-part review 🙂

  • Network Troubleshooting: Wireless N connecting at 54Mb/s

     

    This one came up today with a customer who was extending her Wireless N home wifi network with a wireless access point. The access point was reporting a Wireless N connection at a speed of 54Mb/s rather than 150 or 300Mb/s, and transfer speeds for anything connected to the access point were only 2-3MB/s (not unusual for 54Mb/s). The problem in this case ended up being that the access point was set to TKIP encryption rather than AES – using either WEP or WPA-TKIP may drop speeds back to Wireless G speed, which is 54Mb/s max.

     

    Switching the encryption to AES put speeds back to what they should be. This won’t always be the solution but it’s worth checking if you’re seeing that issue.

  • Intel X520-T2 Visual Overview

    There’s not a great deal to say about these cards apart from that they allow you some crazy network speeds, if you have the disk speed to keep up. They can certainly alleviate network bottlenecks if gigabit is holding you back!

    This particular card has a fan to keep the chipset cool; it’s not going to be heard in a server room but if your workstation is quiet the high-pitched whine is probably going to be audible.

    The card does get reasonably hot, particularly if you’re making good use of it’s capabilities – make sure you have enough airflow in the chassis to keep the card cool. Keep in mind it’s assumed that these cards will be used in an environment where there’s at least 200 linear feet per minute of airflow passing over them.

    10-gigabit cards are coming down in price quite significantly, though switches are still out of reach of most enthusiasts/small businesses. Watch this space, however, as 10GBe connections are making their way into high-end server boards more regularly and that will slowly filter down to the consumer level. SSD arrays becoming more commonplace will only help with that, as will the new 12gb/s cards from LSI – it’s hard to make use of all that bandwidth if you’re piping it over gigabit!

  • Just arrived: Intel Dual-10-Gigabit Network Cards

     

    We got our first Intel X520-T2 10Gbe cards in this week; benchmarks and a review won’t be available for a couple of weeks yet but we’re expecting big things…

     

    Stay tuned for more!

  • How to reset a ProCurve 2510-24g to default settings

    Here’s one someone asked me today – it’s reasonably straight-forward, though not necessarily obvious:

     

    • Press in both the Clear and Reset buttons (tiny buttons on the left edge)
    • Release the Reset button after the port lights come on (~2 seconds)
    • When the Self-Test LED starts flashing (to the left of the Clear and Reset buttons), release the Clear button.

     

    This resets the switch to the factory default settings, including the IP address. By default this switch uses DHCP for its IP if available; try checking your router’s DHCP client list after the switch boots if you’re having trouble finding it.

     

    These switches are popping up in the hands of enthusiasts more regularly now that they’re quite cheap to come by; they can be quite handy for hooking up a large number of devices which don’t require a gigabit connection (printers, UPS’, modems, IP cameras etc.) – 24 100Mb ports and two gigabit ports in a fanless, rack-mountable chassis can be quite handy.

  • Creating a static IP in OpenIndiana/OpenSolaris

    If you’re running an OpenIndiana/OpenSolaris fileserver chances are you’ll need a static IP so that you’ll always know where to find it on the network. There is more than one way of doing this but by far the easiest is using NWAM, or network auto magic.

     

    Do the following (the # at the beginning means you need to have superuser permissions for this, and any line without bolded text at the end means you just hit enter):

     

    # nwamcfg

    nwamcfg> create ncp lan

    nwamcfg:ncp:lan> create ncu phys e1000g0

    Created ncu ‘e1000g0’. Walking properties …

    activation-mode (manual) [manual|prioritized]> prioritized

    enabled (true) [true|false]>

    priority-group> 0

    priority-mode [exclusive|shared|all]> shared

    link-mac-addr>

    link-autopush>

    link-mtu>

    nwamcfg:ncp:lan:ncu:e1000g0> end

    Committed changes

    nwamcfg:ncp:lan> create ncu ip e1000g0

    Created ncu ‘e1000g0‘. Walking properties …

    enabled (true) [true|false]>

    ip-version (ipv4,ipv6) [ipv4|ipv6]> ipv4

    ipv4-addrsrc (dhcp) [dhcp|static]> static

    ipv4-addr> 10.0.1.2

    ipv4-default-route> 10.0.1.1

    nwamcfg:ncp:CorpNet:ncu:e1000g0> end

    Committed changes

    nwamcfg:ncp:lan> end

    nwamcfg> end

    # nwamadm enable -p ncp lan

     

    Voila! You have now set a static ipv4 IP in OpenIndiana/OpenSolaris. If you would like to set an ipv6 address instead, or both, select ipv6 or nothing when prompted for the ip-version. Replace the 10.1.1.2 and gateway (10.1.1.1) with whatever IP addresses match your own network.