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  • #2150564

    Securing against Rogue Ad Hoc APs


    by bayliss_peter ·

    I manage an open wireless network for our computer club. We have about 10 PCs and 3 mornings a week we get about 40 laptop users in to use the network. The problem is that recently all users have been losing their wireless connections which seems to coincide with the appearance of an Ad hoc SSID which keeps changing its MAC address and has a very strong signal. We have tried ensuring that all users are set up for infrastructure only. From the signal strength the AP(s) must be quite close but I dont know if there is some malware that has spread to one or more PCs or if it is a user outside the building. Can anyone advise the best course of action?

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    • #2926187

      WPA Encryption

      by trrrr ·

      In reply to Securing against Rogue Ad Hoc APs

      Secure your network and allow your users access with a password. See what channel the ad-hoc is using and use one of the opposite 2 channels.

      • #2924842

        Thanks. more advice please

        by bayliss_peter ·

        In reply to WPA Encryption

        Thanks for your response. I have already moved channels but I still had the problem when the ad hoc was on 11 and the main network on 3. I am not sure if i understand how ad hoc works, but if i give the WPA key to a user with some sort of malware on his PC surely it will not stop that PC broadcasting Ad hoc?

        • #2924826

          Sounds like your being made a target

          by cg it ·

          In reply to Thanks. more advice please

          Whether someone dislikes your “club” or just generally want to see how much you know, a rogue AP with a really strong signal that knocks you off the network is similar to someone jamming. the only feasible way to prevent signal jamming for wireless network is to boost your signal over his. In essence jam him.

          This probably will result in a pissing contest and unless you have a frequency hopper and everyone else that uses the network also hops to the same frequency up and down the 2.4 ghz range, there’s not much you can do.

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