#NOTIFYR ALTERNATIVES SOFTWARE#

If the new record set belongs to a DNSSEC-secure zone and successfully passed validation it will replace an existing entry.

Authoritative record sets will replace unauthoritative record sets unless DNSSEC validation of the new record set failed.

Record sets that are expired will always be replaced.

There are a few cases where records will be replaced anyway:

in the Additional Section) will not replace existing record sets in the record cache until the given percentage of the original TTL has expired.Ī value of 100 means only expired record sets will be replaced. When non-zero, record sets received (e.g. The default value of 0 means no extra locking occurs. This adds an extra layer of protection-as it limits the window of time cache updates are accepted-at the cost of a less efficient record cache.

The PowerDNS Recursor already has several mechanisms to protect against spoofing attempts. Replace record sets in the record cache only after this percentage of the original TTL has passed. See the DNSSEC in the PowerDNS Recursor information. If this forwarded zone is signed, instead of adding NTA, add the DS record to the lua-config-file. To prevent this, add a Negative Trust Anchor (NTA) for this zone in the lua-config-file with addNTA('your.zone', 'A comment'). internal) zones that have a DNSSEC signed parent zone will validate as Bogus. IMPORTANT: When using DNSSEC validation (which is default), forwards to non-delegated (e.g. a forward to a local authoritative server holding a copy of the root zone, delegations received from that server will work. If an NS record set for a subzone of the forwarded zone is learned, that record set will be used to determine addresses for name servers of the subzone.

#NOTIFYR ALTERNATIVES SOFTWARE#

Cryptographic software and export controlĭNSSEC in the PowerDNS Recursor Next topicįorward-zones=203.0.113.210:5300 127.0.0.1, =127.0.0.1 198.51.100.10:530 :5300įorwarded queries have the recursion desired (RD) bit set to 0, meaning that this setting is intended to forward queries to authoritative servers.socket-owner, socket-group, socket-mode.max-concurrent-requests-per-tcp-connection.

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