[ratelimits] NXDOMAINS rate-limited despite nxdomains-per-second set to 0

Anand Buddhdev anandb at ripe.net
Tue Oct 9 11:00:45 UTC 2012


Yesterday I enabled the rate-limit patch on our BIND servers, with the
following configuration:

rate-limit {
              responses-per-second 10;
              nxdomains-per-second 0;
              max-table-size 40000;

However, I noticed the following in our log files:

rate-limit: limiting NXDOMAIN responses to x.x.x.x/24 for IN PTR

It looks like the rate-limit was still being applied to NXDOMAIN
responses. Is this a bug?

$ named -v
BIND 9.9.1-vjs197.15-P3

Anand Buddhdev

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