[ratelimits] rate limit stats counting of truncated and slipped.
jm5903 at att.com
Fri May 24 12:44:37 UTC 2013
After doing some testing, had a question on the following from the BIND manual:
"Responses dropped by rate limits are included in the RateDropped and QryDropped statistics. Responses
that truncated by rate limits are included in RateSlipped and RespTruncated."
I was comparing named.stats contents from servers which don't have the rate-limit patch and our test servers.
Our rate-limit options: responses-per-second 20; log-only no; slip 2; window 15;
Launched some attack scenarios and noticed three new counts (RateDropped/RespTruncated/QryDropped) appeared in the stats:
315 responses dropped for rate limits
358 responses truncated for rate limits
315 queries dropped
Didn't see any 'slipped' numbers? Something else we should check/configure?
We are concerned about server CPU loading and noted some prior discussion on the topic. Hope to contribute some test results later.
Thanks for the help!
John Murtari <jm5903 at att.com<mailto:jm5903 at att.com>>
C2-2A25 Middletown, NJ
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