No NAT Settings For GL-X3000

Currently I have no NAT settings under Network->NAT Settings. I was running Firmware
4.4.8 and Upgrade to Beta 4.4.9 and I am not seeing the option also.

Depending on what you need to do, Port Forwards is under Firewall.

I need this option to Enable SIP ALG

Look into the package kmod-nf-conntrack-sip under Applications - Plugins

I am not seeing it there

Sorry, I had logged into my Brume2 instead of the Spitz AX. That package is not available on the Spitz AX.