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Solved
WNDR4000 - Blocking Admin Access After Latest Security Update
I updated the firmware in response to a notice I received from Netgear about a security fix. Now, every time I adjust the various settings and the router reboots it blocks my access to the admin pag...
I just applied the latest Firmware (1.0.2.6) update as well, I don't recall the previous version, but it was a much earlier version 1.0.0 (not sure of the last digits). After the update and installation completed (which was applied by direct ethernet connection, i.e. not WIFI), I can no longer connect to the web Administration Page via the default gateway IP address. What's odd is all my setups remained in tact after the Firmware update was applied, including the authentication credentials. If I run an IPCONFIG, the settings for DHCP, Gateway, etc are all as was on my directly connected laptop. But, when I first re-open the admin page using the default gateway IP address and authenticating I receive the message "You are currently logged in from another device. There can be only one device logged in at a time. If you log in from this device, the other device will be logged out. Do you want to proceed?", as I was in the same, or original browser session when the firmware update was applied I clicked "yes" to proceed, after which the connection fails to open the adminstration page. I tried different browsers (Chrome, IE), still no access.
I powered down the router, restarted, entered gateway IP address to connect to admin page, authenticated as requested and the same warning message appears ... "You are currently logged in from another device. There can be only one device logged in at a time. If you log in from this device, the other device will be logged out. Do you want to proceed?" But, this time, choose "No" and the response page displayed a conflicting dynamic IP address, which is different from the dynmamic IP address assigned to the laptop. which I applied the firmware upgrade from. On a whim, I turned off my WIFI connection on my cell phone. I tried to ping the new, conflicting IP address assigned and the request timed out. I then tried to connect to the administration page using the default gateway IP address, SUCCESS.
Bottom line, check what other device may be connected, which I was able to determine by choosing "No" to the Do you want to proceed?
I just applied the latest Firmware (1.0.2.6) update as well, I don't recall the previous version, but it was a much earlier version 1.0.0 (not sure of the last digits). After the update and installation completed (which was applied by direct ethernet connection, i.e. not WIFI), I can no longer connect to the web Administration Page via the default gateway IP address. What's odd is all my setups remained in tact after the Firmware update was applied, including the authentication credentials. If I run an IPCONFIG, the settings for DHCP, Gateway, etc are all as was on my directly connected laptop. But, when I first re-open the admin page using the default gateway IP address and authenticating I receive the message "You are currently logged in from another device. There can be only one device logged in at a time. If you log in from this device, the other device will be logged out. Do you want to proceed?", as I was in the same, or original browser session when the firmware update was applied I clicked "yes" to proceed, after which the connection fails to open the adminstration page. I tried different browsers (Chrome, IE), still no access.
I powered down the router, restarted, entered gateway IP address to connect to admin page, authenticated as requested and the same warning message appears ... "You are currently logged in from another device. There can be only one device logged in at a time. If you log in from this device, the other device will be logged out. Do you want to proceed?" But, this time, choose "No" and the response page displayed a conflicting dynamic IP address, which is different from the dynmamic IP address assigned to the laptop. which I applied the firmware upgrade from. On a whim, I turned off my WIFI connection on my cell phone. I tried to ping the new, conflicting IP address assigned and the request timed out. I then tried to connect to the administration page using the default gateway IP address, SUCCESS.
Bottom line, check what other device may be connected, which I was able to determine by choosing "No" to the Do you want to proceed?
Have you tried clearing the catch of the internet browser you are using on the computer?