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Diffstat (limited to 'middleware/httpproxy/README.md')
| -rw-r--r-- | middleware/httpproxy/README.md | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/middleware/httpproxy/README.md b/middleware/httpproxy/README.md index 026fbdc71..f0bf58903 100644 --- a/middleware/httpproxy/README.md +++ b/middleware/httpproxy/README.md @@ -48,3 +48,24 @@ proxy . dns.google.com { upstream /etc/resolv.conf } ~~~ + +## Debug queries + +Debug queries are enabled by default and currently there is no way to turn them off. When CoreDNS +receives a debug queries (i.e. the name is prefixed with `o-o.debug.` a TXT record with Comment from +`dns.google.com` is added. Note this is not always set, but sometimes you'll see: + +`dig @localhost -p 1053 mx o-o.debug.example.org`: + +~~~ txt +;; OPT PSEUDOSECTION: +; EDNS: version: 0, flags:; udp: 4096 +;; QUESTION SECTION: +;o-o.debug.example.org. IN MX + +;; AUTHORITY SECTION: +example.org. 1799 IN SOA sns.dns.icann.org. noc.dns.icann.org. 2016110711 7200 3600 1209600 3600 + +;; ADDITIONAL SECTION: +. 0 CH TXT "Response from 199.43.133.53" +~~~ |