goalify.link. @199.247.155.53 (ns4.dnsimple-edge.org.): dns=ok zflag=timeout edns=ok edns1=soa edns@512=ok,notc ednsopt=echoed edns1opt=soa,echoed do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=expire-bad,subnet
goalify.link. @2620:111:8007::53 (ns4.dnsimple-edge.org.): dns=ok zflag=timeout edns=ok edns1=soa edns@512=ok,notc ednsopt=echoed edns1opt=soa,echoed do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=expire-bad,subnet
goalify.link. @162.159.26.4 (ns3.dnsimple.com.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid (618m48)
goalify.link. @2400:cb00:2049:1::a29f:1a04 (ns3.dnsimple.com.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid (464m233)
goalify.link. @162.159.24.4 (ns1.dnsimple.com.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid (1164m9)
goalify.link. @2400:cb00:2049:1::a29f:1804 (ns1.dnsimple.com.): dns=ok zflag=ok edns=ok edns1=ok edns@512=ok,notc ednsopt=ok edns1opt=ok do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=ok,nsid (1232m36)
goalify.link. @199.247.153.53 (ns2.dnsimple-edge.net.): dns=ok zflag=timeout edns=ok edns1=soa edns@512=ok,notc ednsopt=echoed edns1opt=soa,echoed do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=expire-bad,subnet
goalify.link. @2620:111:8005::53 (ns2.dnsimple-edge.net.): dns=ok zflag=timeout edns=ok edns1=soa edns@512=ok,notc ednsopt=echoed edns1opt=soa,echoed do=ok ednsflags=ok docookie=ok edns512tcp=ok optlist=expire-bad,subnet
Warning: test failures may indicate that some DNS clients cannot resolve the zone or will get a unintended answer or resolution will be slower than necessary.
Warning: failure to address issues identified here may make future DNS extensions that you want to use ineffective. In particular echoing back unknown EDNS options and unknown EDNS flags will break future signaling between DNS client and DNS server. We already have examples of this where you cannot depend on the AD flag bit meaning anything in replies because too many DNS servers just echo it back. Similarly the EDNS Client Subnet (ECS) option cannot just be sent to everyone in part because of servers just echoing it back.
dig +nocookie +norec +noad +edns=1 +noednsneg soa zone @server
expect: BADVERS
expect: OPT record with version set to 0
expect: not to see SOA
See RFC6891, 6.1.3. OPT Record TTL Field Use
dig +nocookie +norec +noad +ednsopt=100 soa zone @server
expect: SOA
expect: NOERROR
expect: OPT record with version set to 0
expect: that the option will not be present in response
See RFC6891, 6.1.2 Wire Format
dig +nocookie +norec +noad +edns=1 +noednsneg +ednsopt=100 soa zone @server
expect: BADVERS
expect: OPT record with version set to 0
expect: not to see SOA
expect: that the option will not be present in response
See RFC6891
dig +edns +noad +norec +nsid +subnet=0.0.0.0/0 +expire +cookie -q zone @server
expect: NOERROR
expect: OPT record with version set to 0
See RFC6891
dig +norec +noad +noedns +zflag soa zone @server
expect: SOA
expect: NOERROR
expect: Z bit to be clear in response
See RFC1035, 4.1.1. Header section format
To retrieve this report in the future: https://ednscomp.isc.org/ednscomp/9d65220756
The source code for the tester can be downloaded from ISC Open Source Projects / DNS-Compliance-Testing.
For more information about EDNS please see the main site.
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