How to Disable SIP ALG on a Draytek Router


Log on to the router via Telnet using an SSH client such as Putty:

Check if SIP ALG is Enabled or Disabled:

Enter the following command to see if SIP ALG is Enabled or Disabled: sys sip_alg ?

When you see 0 that means SIP ALG is Disabled and when you see 1 that means SIP ALG is Enabled.

draytek router

Disable SIP ALG

Enter the following commands to Disable SIP ALG:

sys sip_alg 0
sys commit
sys reboot

Now that changes are saved and the router will restart.


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