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Sudden WiFi-collapse; works only if security disabled

  1. #1
    Bronze Member
    Join Date
    Jun 2009
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    102

    Default Sudden WiFi-collapse; works only if security disabled

    Hello!

    i have a TP-Link TL-WDR3600 router, with DD-WRT v24-sp2 (07/24/13) std on it. till y'day late night it had been working fine (wifi), and i put a Win 10 iso on my laptop for download. in the morning, found the download to be completed, however, the wifi not working anymore.

    i have 3 laptops, 4 phones and a tab that connect through wifi to the home-network. none is working. on the phones (android), they either can't find the SSID, or if i 'forget network' and set it up again, it reads 'not in range'. on laptop, it can't discover my network.

    after some looking around on the web, i disabled the wireless security to test, and lo! the devices began connecting to the wifi immediately. i then changed the security from the earlier 'WPA Personal Mixed' and TKIP+AES, to 'WPA2 Personal' and AES, but to no avail. then changed the SSID and security-key too, again no use. changed the channel too (from 11 to 8 and 6), no use again. have disabled MAC Filtering as well. checked the wireless on/off switch at the back of the router. its also at ON position.

    so all-in-all, the devices are now connecting to wifi only if i disable the wireless security. i don't know how did this happen. hadn't tinkered around with any setting prior sleeping y'day night. may be due to some interference?

    inviting some suggestions please on how could it be resolved.

    TIA!

  2. #2
    Platinum Member
    Join Date
    Jul 2008
    Posts
    5,197

    Default

    I would suggest doing a factory reset on your router and start afresh. 99% of the times this does the trick even though we would never find out what caused it in the first place but we can live with that but not with a non functional wifi router

    Hit that reset button and configure it again and see how it goes and then we can start troubleshooting step by step if it still does not work.
    Admin likes this.

  3. #3
    Bronze Member
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    Jun 2009
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    102

    Default

    thanks! yes, attempting that. have never done it before on ddwrt, and its not very easy either. will do, re-configure, then see it it helped. if not, shall do it again and then upgrade the FW.
    Admin and SmoothVibes like this.

  4. #4
    Bronze Member
    Join Date
    Jun 2009
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    102

    Default

    UPDATE: successfully upgraded the firmware of my router. re-configured it, and wifi is working again!
    will re-install transmission, samba, mini-dlna, etc. tomorrow.

    P.S. - it anyway looked like a full nvram issue (it was actually full, as seen from the sys-info on router-page); simple cleaning of it using SSH could've resolved the problem, but FW-upgrade too was pending since a long time, so finally took that route. its better this way.
    Admin and SmoothVibes like this.

  5. #5
    Platinum Member
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    Jul 2008
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    Default

    Resetting to factory and upgrading again works more often then not provided the hardware has not gone bad. Glad to know your wifi is up and running again
    MegaMaverick likes this.

  6. #6
    Bronze Member
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    Jun 2009
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    Default

    writing additionally (in hope that its useful for someone else), this time i've set the wireless-security to 'WPA2 Personal' and 'AES', which i guess is considered the most secure protocol, atleast for home wireless networks. earlier i was foolish enough not to read about this and keep the setting at 'WPA Personal Mixed' and 'TKIP+AES', a norm i had been following from the default-settings of my earlier MTNL-router (TKIP is deprecated and the least secure). changing the wireless-key to something tougher to hack using even a brute-force attack was the final topping on the pudding i added.
    SmoothVibes and pshrinivasan like this.

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