ratelimit

Description

The ratelimit plugin enables response rate limiting to mitigate DNS attacks.

Syntax

ratelimit LIMIT

• LIMIT the amount of responses-per-second allowed from an IP.

ratelimit LIMIT {
    whitelist [IPs...]
}

• whitelist the list of IPs exluded from rate limit.

Metrics

If monitoring is enabled (via the prometheus plugin) then the following metric are exported:

• coredns_ratelimit_dropped_request_total{server} - count per server

Examples

ratelimit 50 {
    whitelist 127.0.0.1 192.168.1.25 10.240.1.1
}