Disabling SIP / ALG - ZyXEL P660
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Disabling SIP / ALG - ZyXEL P660

WARNING, deviating from these steps may cause the device to become non-responsive.

  1. Ensure the computer is connected to the router.
  2. From the Windows desktop open a Command Prompt window.
    Navigate: Start > All Programs > Accessories > Command Prompt.
  3. At the prompt type ipconfig then press the Enter key.
  4. 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.
  5. At the prompt type telnet 192.168.2.1 then press the Enter key.
    If telnet is not recognized please refer to Microsoft® Telnet: frequently asked questions, click How do I install Telnet? for additional assistance.
  6. Enter the router password then press the Enter key.
    The default password is 1234.
  7. Type 24 then press the Enter key.
  8. Type 8 then press the Enter key.
  9. At the prompt type ip nat service sip active 0 then press the Enter key.
  10. At the prompt type exit then press the Enter key.
  11. Type 99 then press the Enter key.
Last Modified: March 30, 2009
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