Disabling SIP ALG – ZyXEL P661
WARNING, deviating from these steps may cause the device to become non-responsive.
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Ensure the computer is connected to the router.
- From the Windows desktop open a Command Prompt window.
Navigate: Start > All Programs > Accessories > Command Prompt. - At the prompt type ipconfig then press the Enter key.
- From the Ethernet adapter Local Area Connection section, locate the Default Gateway address (e.g., 192.168.2.1).
The Default Gateway address will vary depending upon the configuration. -
At the prompt type telnet 192.168.2.1 then press the Enter key.
If telnet is not recognized, you may need to use something like Putty (http://www.chiark.greenend.org.uk/~sgtatham/putty/) - Enter the router password then press the Enter key.
The default password is 1234. - At the prompt type ‘ip nat service sip active 0′ without quotes, the last letter is a zero then press the Enter key.
- After being told that sip alg has been disabled, type in Exit.