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Miek Gieben c4ab98c6e3 Add middleware.NextOrFailure (#462) 
This checks if the next middleware to be called is nil, and if so returns
ServerFailure and an error. This makes the next calling more robust and
saves some lines of code.

Also prefix the error with the name of the middleware to aid in
debugging.
2016-12-20 18:58:05 +00:00
..
black_lies.go Add middleware/dnssec (#133) 2016-04-26 17:57:11 +01:00
black_lies_test.go Fix various issues with formatting and typos (#424) 2016-11-13 14:03:12 +00:00
cache.go Add middleware/dnssec (#133) 2016-04-26 17:57:11 +01:00
cache_test.go Replace go-cache with golang-lru in dnssec (#336) 2016-10-17 13:04:36 +01:00
dnskey.go Golint2 (#280) 2016-09-23 09:14:12 +01:00
dnssec.go Add metrics for cache hits/misses (#375) 2016-10-31 18:50:50 +00:00
dnssec_test.go Replace go-cache with golang-lru in dnssec (#336) 2016-10-17 13:04:36 +01:00
handler.go Add middleware.NextOrFailure (#462) 2016-12-20 18:58:05 +00:00
handler_test.go middleware/file: include nsset in replies 2016-12-09 11:59:14 +00:00
README.md Add metrics for cache hits/misses (#375) 2016-10-31 18:50:50 +00:00
responsewriter.go middleware/metrics: cleanup (#355) 2016-10-26 10:01:52 +01:00
rrsig.go Golint2 (#280) 2016-09-23 09:14:12 +01:00
setup.go middleware/metrics: cleanup (#355) 2016-10-26 10:01:52 +01:00
setup_test.go Add cache_capacity option to dnssec middleware for the capacity of LRU cache (#339) 2016-10-18 13:33:23 -07:00

README.md

dnssec

dnssec enables on-the-fly DNSSEC signing of served data.

Syntax

dnssec [ZONES...]
  • ZONES zones that should be signed. If empty, the zones from the configuration block are used.

If keys are not specified (see below), a key is generated and used for all signing operations. The DNSSEC signing will treat this key a CSK (common signing key), forgoing the ZSK/KSK split. All signing operations are done online. Authenticated denial of existence is implemented with NSEC black lies. Using ECDSA as an algorithm is preferred as this leads to smaller signatures (compared to RSA). NSEC3 is not supported.

A single signing key can be specified by using the key directive.

NOTE: Key generation has not been implemented yet.

TODO(miek): think about key rollovers, and how to do them automatically.

dnssec [ZONES... ] {
    key file KEY...
    cache_capacity CAPACITY
}

  • key file indicates that key file(s) should be read from disk. When multiple keys are specified, RRsets will be signed with all keys. Generating a key can be done with dnssec-keygen: dnssec-keygen -a ECDSAP256SHA256 <zonename>. A key created for zone A can be safely used for zone B.

  • cache_capacity indicates the capacity of the LRU cache. The dnssec middleware uses LRU cache to manage objects and the default capacity is 10000.

Metrics

If monitoring is enabled (via the prometheus directive) then the following metrics are exported:

  • coredns_dnssec_cache_size{type} - total elements in the cache, type is "signature".
  • coredns_dnssec_cache_capacity{type} - total capacity of the cache, type is "signature".
  • coredns_dnssec_cache_hits_total - Counter of cache hits.
  • coredns_dnssec_cache_misses_total - Counter of cache misses.

Examples