On Fri, Dec 01, 2017 at 03:44:22PM +0100, Tim Wattenberg <m...@timwattenberg.de> wrote a message of 123 lines which said:
> In my measurement I activated the option to use the probes > resolver(s) and left the option to resolve on the probe deactivated. The documentation <https://atlas.ripe.net/docs/api/v2/reference/#!/measurements/Dns_Type_Measurement_List_POST> appears misleading here, for the specific case of DNS. For DNS measurements: 'use_probe_resolver': True means using the probe's resolver(s), typically obtained through DHCP 'use_probe_resolver': False means you have to indicate a name server (resolver or authoritative) as a target. Atlas rejects 'use_probe_resolver': False if you did not specify a target: Status 400, reason "{"error":{"status":400,"errors":[{"source":{"pointer":"/definitions/0"},"detail":"`target` cannot be null if `use_probe_resolver` is not specified"}],"code":102,"detail":"There was a problem with your request","title":"Bad Request"}}" 'resolve_on_probe' seems ignored. Examples with atlas-resolve: 1) Use the probe's resolver(s): % atlas-resolve -r 5 -v thepiratebay.org {'definitions': [{'protocol': 'UDP', 'description': 'DNS resolution of thepiratebay.org', 'af': 4, 'query_argument': 'thepiratebay.org', 'query_type': 'A', 'query_class': 'IN', 'set_rd_bit': True, 'type': 'dns', 'use_probe_resolver': True}], 'is_oneoff': True, 'probes': [{'requested': 5, 'type': 'area', 'value': 'WW', 'tags': {'include': ['system-resolves-a-correctly', 'system-resolves-aaaa-correctly', 'system-ipv4-works']}}]} Measurement #10397465 for thepiratebay.org/A uses 5 probes [104.27.216.28 104.27.217.28] : 4 occurrences [213.46.185.10] : 1 occurrences Test #10397465 done at 2017-12-03T16:18:22Z 2) Use an external server (here, Quad9, option -e): % atlas-resolve -r 5 -v -e 9.9.9.9 thepiratebay.org {'definitions': [{'protocol': 'UDP', 'description': 'DNS resolution of thepiratebay.org via nameserver 9.9.9.9', 'af': 4, 'query_argument': 'thepiratebay.org', 'query_type': 'A', 'query_class': 'IN', 'target': '9.9.9.9', 'set_rd_bit': True, 'type': 'dns', 'use_probe_resolver': False}], 'is_oneoff': True, 'probes': [{'requested': 5, 'type': 'area', 'value': 'WW', 'tags': {'include': ['system-ipv4-works']}}]} Measurement #10397471 for thepiratebay.org/A uses 5 probes Nameserver 9.9.9.9 [104.27.216.28 104.27.217.28] : 5 occurrences Test #10397471 done at 2017-12-03T16:19:41Z In the case 1), measurement #10397465, the "dst_addr" field will indicate the address of the resolver: % wget -q -O - https://atlas.ripe.net/api/v2/measurements/10397465/results/ | jq "map(.resultset) | flatten(1) | map(.dst_addr)" [ "172.29.253.203", "172.29.254.203", "80.58.61.250", "80.58.61.254", "62.179.104.196", "213.46.228.196", "217.11.217.3", "217.11.217.13", "192.168.10.2", "208.67.222.222" ] In the case 2), measurement #10397471: % wget -q -O - https://atlas.ripe.net/api/v2/measurements/10397471/results/ | jq "map(.dst_addr)" [ "9.9.9.9", "9.9.9.9", "9.9.9.9", "9.9.9.9", "9.9.9.9" ]
