Last night when running 6e for the first time, it only just hit me that probe and backdoor entry are both resisted with Willpower+Firewall, but the roll is made exclusively by Hosts, which are not given a willpower stat, nor is it explained anywhere I see what to substitute there. What is this roll? Closest I can figure is to use the Mental Stat Equivalence for Technomancers and roll Firewall twice, but it feels like a misuse of that table.