1) Log into your router.
2) Click on 'Network Configuration' located on the left-hand column.
3) Click on 'Cellular' (1 in the picture below)
4) Change the 'APN' field to be the appropriate APN (2 in the picture below)
5) Click 'Save Changes' to save the new information. (3 in the picture below)
6) Verizon will tell you which APN you need to use based off of your static IP, but it will always be one of the following
Verizon Static APN's
so01.vzwstatic - florida
mw01.vzwstatic - Midwest
we01.vzwstatic - West
ne01.vzwstatic - North East