If you need to use your own Sonicwall or other firewall and use a Verizon FiOS G1100 see the below steps for two options to bypass the Verizon router.
Actiontec 300 Mbps Wireless-N ADSL Modem Router (GT784WN) : Electronics
Verizon FIOS-G1100 Router - Computers & Laptops
networking - Android appears to bypass firewall rule which restricts request for port 53 - Server Fault
Verizon Fios G1100 Quantum Gateway Router Modem Manual
How to Use Your Own Router With Verizon FiOS (with Pictures)
Cannot figure out fios G1100 router setting to block port 53 – OpenDNS
How to Use Your Own Router With Verizon FiOS (with Pictures)
Fios Quantum Gateway router
Correct answer: Community Forums - PORT FORWARDING UPDATE G3100 - Verizon Community
Buy Verizon Fios Router Actiontec MI424WR Rev I Online at desertcartSouth Africa
SIP ALG: What Is It & Why You Should Disable It for VoIP
Topic: My encounter with Verizon @ AskWoody