• Evan Hunt's avatar
    [master] DDoS mitigation features · 1479200a
    Evan Hunt authored
    3938.	[func]		Added quotas to be used in recursive resolvers
    			that are under high query load for names in zones
    			whose authoritative servers are nonresponsive or
    			are experiencing a denial of service attack.
    
    			- "fetches-per-server" limits the number of
    			  simultaneous queries that can be sent to any
    			  single authoritative server.  The configured
    			  value is a starting point; it is automatically
    			  adjusted downward if the server is partially or
    			  completely non-responsive. The algorithm used to
    			  adjust the quota can be configured via the
    			  "fetch-quota-params" option.
    			- "fetches-per-zone" limits the number of
    			  simultaneous queries that can be sent for names
    			  within a single domain.  (Note: Unlike
    			  "fetches-per-server", this value is not
    			  self-tuning.)
    			- New stats counters have been added to count
    			  queries spilled due to these quotas.
    
    			See the ARM for details of these options. [RT #37125]
    1479200a
tests.sh 22.7 KB