Disable SIP ALG on (most) Netgear routers

1. Connect to the NETGEAR device using a wired/wireless connection.

2. Once connected access the GUI interface of the NETGEAR device 
    by typing http://www.routerlogin.net in the browser.

3. The router login screen will asks for a login and password. 
    (if you have not changed the default password:
        default username: admin
        default password: password

4. Once logged into the NETGEAR genie page, click ADVANCED.

5. Click Setup.

6. Click WAN Setup.

7. On the WAN Setup page, disable SIP ALG by selecting Disable SIP ALG.

8. Click Apply to save the settings.