Closed bigdargon closed 2 years ago
jedisct1
commented
2 years ago Hi!
And thanks!
What should be the description for this entry? Is the main difference that the server location depends on the bootstrap resolver rather than automatic routing?
bigdargon
commented
2 years ago The ultra low server feature is currently not officially announced on the homepage, but i can find is a map of the network pops of nextdns.
This is a thread I created before https://help.nextdns.io/t/y4ht599/servers-in-vietnam-are-testing
Some server anycast & ultra low https://router.nextdns.io/?limit=10&stack=dual
[{"hostname":"anexia-han-1.edge.nextdns.io","ips":["203.162.172.59"]},{"hostname":"greencloud-han-1.edge.nextdns.io","ips":["103.199.17.192","2404:fbc0::1:0:0:bb:6d75"]},{"hostname":"bangmod-bkk-1.edge.nextdns.io","ips":["116.204.183.61"]},{"hostname":"premiumrdp-bkk-1.edge.nextdns.io","ips":["43.229.79.19"]},{"hostname":"premiumrdp-kul-1.edge.nextdns.io","ips":["45.121.146.34"]},{"hostname":"thegigabit-kul-1.edge.nextdns.io","ips":["45.121.145.91"]},{"hostname":"zepto-sin-1.edge.nextdns.io","ips":["194.156.163.172","2407:b9c0:e003:180:5054:ff:fe7f:c513"]},{"hostname":"gsl-sin-1.edge.nextdns.io","ips":["103.62.48.147","2401:3bc0:600:101:c2f:a6e6:5afd:1"]},{"hostname":"vultr-sin-1.edge.nextdns.io","ips":["45.76.144.218","2001:19f0:4400:6432:5400:2ff:fec8:772b"]},{"hostname":"anexia-sin-1.edge.nextdns.io","ips":["217.146.9.93","2a00:11c0:26:4::5"]}]And ping tool https://ping.nextdns.io/
greencloud-han (IPv6) 33 ms
greencloud-han 36 ms (ultralow2)
■ anexia-han 38 ms (ultralow1)
anexia-hkg 39 ms (anycast2)
zepto-sin 39 ms
vultr-sin 54 ms
zepto-sin (IPv6) 58 ms
zepto-hkg (IPv6) 60 ms (anycast1)
gsl-sin (IPv6) 61 ms
anexia-sin (IPv6) 61 ms
gsl-sin 62 ms
vultr-sin (IPv6) 63 ms
premiumrdp-kul 68 ms
anexia-sin 75 ms
premiumrdp-bkk 78 ms
thegigabit-kul 80 ms
bangmod-bkk 99 ms
zepto-fra 175 ms (anycast1)
anexia-ams (IPv6) 229 ms (anycast2)
dns1.nextdns.io (IPv6) error (ultralow1)
dns2.nextdns.io (IPv6) error (ultralow2)And here is the latest diagnostic (a network diagnostic tool by nextdns https://github.com/nextdns/diag) I created https://nextdns.io/diag/93eb6770-8ed1-11ec-9013-af4fb4bae918
In the diagnostic there are 2 groups of servers, Ultra Low Latency and Anycast. Ultra Low Latency servers are only available when using encrypted DNS like DoH, DoT (no anycast IP address attached). The Anycast servers use the anycast IP address, which is for plain-text DNS without encryption.
If you attach the IP address to the DoH, you will still use the Anycast server. If the domain dns.nextdns.io is resolved at bootstrap servers (with ECS) like Google DNS or OpenDNS (Cloudflare DNS is sometimes available) there will be an IP address in the country in which the user lives.
Ex:
; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> dns.nextdns.io @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37255
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;dns.nextdns.io. IN A
;; ANSWER SECTION:
dns.nextdns.io. 300 IN CNAME steering.nextdns.io.
steering.nextdns.io. 60 IN A 103.199.17.192
steering.nextdns.io. 60 IN A 203.162.172.59
;; Query time: 298 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Wed Feb 16 09:59:47 +07 2022
;; MSG SIZE rcvd: 98; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> dns.nextdns.io @208.67.222.222
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57309
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;dns.nextdns.io. IN A
;; ANSWER SECTION:
dns.nextdns.io. 298 IN CNAME steering.nextdns.io.
steering.nextdns.io. 60 IN A 203.162.172.59
steering.nextdns.io. 60 IN A 103.199.17.192
;; Query time: 337 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Wed Feb 16 10:03:44 +07 2022
;; MSG SIZE rcvd: 98; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> dns.nextdns.io @1.1.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57523
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;dns.nextdns.io. IN A
;; ANSWER SECTION:
dns.nextdns.io. 300 IN CNAME steering.nextdns.io.
steering.nextdns.io. 60 IN A 103.199.17.192
steering.nextdns.io. 60 IN A 203.162.172.59
;; Query time: 290 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Wed Feb 16 09:59:52 +07 2022
;; MSG SIZE rcvd: 98But if using 9.9.9.9 (without ECS) and 9.9.9.11 (with ECS), the ultra low server will be different
; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> dns.nextdns.io @9.9.9.9
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4888
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;dns.nextdns.io. IN A
;; ANSWER SECTION:
dns.nextdns.io. 289 IN CNAME steering.nextdns.io.
steering.nextdns.io. 49 IN A 103.62.48.147
steering.nextdns.io. 49 IN A 217.146.9.93
;; Query time: 62 msec
;; SERVER: 9.9.9.9#53(9.9.9.9)
;; WHEN: Wed Feb 16 10:04:37 +07 2022
;; MSG SIZE rcvd: 98; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> dns.nextdns.io @9.9.9.11
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11996
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 8003ee986a373c0a90e09d04620c6a125d10079ace398b8d (good)
;; QUESTION SECTION:
;dns.nextdns.io. IN A
;; ANSWER SECTION:
dns.nextdns.io. 300 IN CNAME steering.nextdns.io.
steering.nextdns.io. 60 IN A 203.162.172.59
steering.nextdns.io. 60 IN A 103.199.17.192
;; Query time: 305 msec
;; SERVER: 9.9.9.11#53(9.9.9.11)
;; WHEN: Wed Feb 16 10:05:54 +07 2022@jedisct1 I have updated and checked it seems that the DNS Stamp of nextdns and nextdns-ultralow are the same. And nextdns-ultralow has been assigned an IP address? So, the incoming server is still anycast, not ultralow (I tried it on raspberry and the result is at https://test.nextdns.io it still shows anycast as true)
As far as I know, dnscrypt-proxy will connect to hostname using the IP address available in DNS Stamp. And I want to add -ultralow by not putting IP address in DNS Stamp, then dnscrypt-proxy will resolve hostsname via bootstrap server.
Please check this out! Thank you!
Ultralow servers are servers located in each country, making domain name resolution faster. I am living in Vietnam, when using the ultralow server, there are 2 following servers.
Ultralow server does not use anycast address like
45.90.28.045.90.30.02a07:a8c0::2a07:a8c1::In addition to the available nextdns resolution servers (with IP address attached). I request to add
nextdns-ultralowserver without ip address, thendns.nextdns.iodomain name will switch to bootstrap resolver (ex 8.8.8.8) server to get server ip address.I have DNS Stramps calculated according to the parameters
dns.nextdns.io/Thanks!