truncate-retry.toml

# Example showing how to handle truncated responses that can occur with
# UDP and DTLS responses. The `truncate-retry` element will always try
# the primary UDP resolver first, but if the respone is truncated it'll
# retry using the (slower) TCP resolver. This ensures that only complete
# responses are cached.

# Primary resolver (UDP)
[resolvers.cloudflare-udp]
address = "1.1.1.1:53"
protocol = "udp"
edns0-udp-size = 1232

# TCP Fallback resolver if UDP responses are truncated
[resolvers.cloudflare-tcp]
address = "1.1.1.1:53"
protocol = "tcp"

# Try UDP first, if truncated use the alernative
[groups.retry]
type = "truncate-retry"
resolvers = ["cloudflare-udp"]
retry-resolver = "cloudflare-tcp"

[groups.cache]
type = "cache"
resolvers = ["retry"]

[listeners.local-udp]
address = "127.0.0.1:53"
protocol = "udp"
resolver = "cache"

[listeners.local-tcp]
address = "127.0.0.1:53"
protocol = "tcp"
resolver = "cache"