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.
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5. Click Setup.
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6. Click WAN Setup.
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7. On the WAN Setup page, disable SIP ALG by selecting Disable SIP ALG.
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8. Click Apply to save the settings.