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ALG SIP on firewall, router, etc.

Article ID: 4
Last updated: 08 Feb, 2021

If you experience that when a call comes in your SIP device is not ringing this might be due that on your (ISP) router the SIP is enabled on the ALG level.

To solve this issue;-

  1. Login to your router/firewall/etc.
  2. Look for SIP (this is often under Network -> Advanced -> Firewall)
  3. Disable SIP (see screenshot below)
  4. Reboot your device

TIP: You can also do a web search in any search engine for "Disable SIP ALG" together with your router make and model it will likely show you how-to disable it.

FW_ALG_SIP_and_IPSec_Disabled-01

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Article ID: 4
Last updated: 08 Feb, 2021
Revision: 3
Views: 49
Comments: 0