enableStunNatDetection property
Whether the host asks two STUN servers whether its NAT maps UDP like a
cone or like a symmetric NAT (see StunNatTypeProbe), at start and
every 10 minutes. Off by default, because it contacts the STUN servers
in stunServers (Google's when null). The result is published as
EvtNATDeviceTypeChanged; with a symmetric NAT, a hole punch makes one
attempt instead of three.
Implementation
bool enableStunNatDetection = false;