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WiFi Site Survey Tools

Discussion in 'Networking Issues' started by fixmacs, Feb 1, 2005.

  1. fixmacs

    fixmacs Network Guru Member

    I've seen various Stumbler applications which survey for open 802.11x networks. The problems I am ecountering with a WiFi network appear to be related to radio interference from some undetermined source of 2.4 GHz emissions. Using a WRT54GS, all of the wireless clients get knocked off the network simultaneously everyday, at various times in the afternoon hours.

    I need a means to identify all of the 2.4 GHz signals in the network site in an effort to identify channel conflicts. I am unable to identify any open networks, which the Stumbler utilites identify. Now, I'm left wondering if there's a closed WiFi network in the building that is running on the same, or adjacent, channel. I really don't want to play a guessing game by changing the channels, then waiting to see what happens. I'd like to identify the interferring channel, if there is one. I'm not even certain it's a channel interference issue.

    Ideally, I'd like purchas a handheld hardware 802.11x sniffer for site surveys and troubleshooting, or to find a software equivalent, but as soon as you say "sniffer" everyone thinks I'm a hacker trying to break into someone else's WiFi network. Not!

    What are the most useful tools for identifying radio interference?
     
  2. andy71600

    andy71600 Network Guru Member

    Try using Network Stumbler. It sniffs out all 802.11a/b/g (depending on the capabilities of your wireless card) networks in your area.
     
  3. howardp6

    howardp6 Network Guru Member

    The only problem with Netumbler is that is does not work with all Wireless NIC, it will not show you interference from wireless telephones and microwaves that work on the same frequency. If you do pickup someone elses wireless network and can identify the channel it is using change to a non overlapping channel. The non-overlapping channels in the USA are one, six and eleven. If you are using Sveasoft Satori it has a survey tool in the wireless status menu. If you have a WRT54G or WRT54GS start your browser, with your computer hardwired to your router and type in 192.168.1.X/site_survey.asp and you will be able to see any networks in your area, where the value "X" is the last node in the IP Address of your router.
     
  4. Chilly

    Chilly Network Guru Member

    Except that 192.168.1.X/site_survey.asp is misspelled as 192.168.1.X/site_suvery.asp...
     

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