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UDP 5053

ProtocolUDP
Port5053
Labels

Synopsis

  • Cloudflare’s cloudflared (DNS-over-HTTPS client) is commonly configured to listen on UDP 5053 as a local DNS stub to avoid clashing with port 53, especially in Pi-hole, OpenWrt, and pfSense setups.
  • Pi-hole deployments that use cloudflared typically point their upstream DNS to 127.0.0.1#5053 (UDP).
  • dnscrypt-proxy is often configured to bind to UDP 5053 in similar deployments (e.g., Pi-hole or OpenWrt), with dnsmasq or Unbound forwarding queries to it.
  • Docker images and Helm charts for cloudflared frequently expose or map UDP 5053 for local DNS proxying.
  • There is no widely standardized protocol assigned to UDP 5053; its real-world use is primarily as a local DNS proxy listener port.

Observed activity

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