Via protection is an important part of modern PCB design. It provides additional benefits in PCB manufacturing and assembly, increasing the number of acceptable products. There are several types of vias protection detailed in the IPC-4761 Design Guide for Protection of Printed Board Via Structures and on pages 5-11 of this document.
Common situations where vias protection is recommended or required:
Altium Designer supports via types according to IPC-4761.
To configure the type of protection for vias: