Encrypted DNS + NTP = DeadlockPhoto by Uzoma Ozurumba, CC BY-SA 4.0, no changesI’m generally a big fan of encrypted DNS for the security it provides with negligible performance impact. But I recently found out the hard way that DNS over TLS/HTTPS can deadlock with Network Time Protocol (NTP) on embedded devices without a battery-backed real-time clock. Many low-cost routers lack a battery for keeping time during power loss. Af
