История изменений
Исправление anc, (текущая версия) :
B will automatically help A and C punch holes through their NAT, in a way similar to the STUN protocol, so that A and C can still communicate with each other directly
Но
It is not always possible to do this however, and firewalls might also prevent direct communication. In that case, VPN packets between A and C will be forwarded by B.
Мне кажется достаточно удобное решение.
ЗЫ
Надо будет потестить на досуге.
Исходная версия anc, :
B will automatically help A and C punch holes through their NAT, in a way similar to the STUN protocol, so that A and C can still communicate with each other directly