I cannot access w3schools.com while 1.1.1.1/1.0.0.1 active

I have been using Cloudflare DNS (1.1.1.1/1.0.0.1) on my router at home for a long time. However, for the past few months, I have not been able to access to w3schools.com. When I delete Cloudflare DNS on my router, I can access it. What do you think could be the problem? Another Turkish user has created a thread (W3schools.com cannot be resolved in 1.1.1.1 (but resolvable in 1.0.0.1)) about this problem. Is it a problem with Internet Service Providers or Cloudflare Data Center in Turkey?

https://1.1.1.1/help#eyJpc0NmIjoiWWVzIiwiaXNEb3QiOiJObyIsImlzRG9oIjoiTm8iLCJyZXNvbHZlcklwLTEuMS4xLjEiOiJZZXMiLCJyZXNvbHZlcklwLTEuMC4wLjEiOiJZZXMiLCJyZXNvbHZlcklwLTI2MDY6NDcwMDo0NzAwOjoxMTExIjoiTm8iLCJyZXNvbHZlcklwLTI2MDY6NDcwMDo0NzAwOjoxMDAxIjoiTm8iLCJkYXRhY2VudGVyTG9jYXRpb24iOiJJU1QiLCJpc1dhcnAiOiJObyIsImlzcE5hbWUiOiJDbG91ZGZsYXJlIiwiaXNwQXNuIjoiMTMzMzUifQ==

So many problems with Internet in Turkey… :pensive:

That domain resolves for me with the following command from MacOS Terminal:
dig @1.1.1.1 w3schools.com

Try these commands and let us know which datacenter they show:
dig +short CHAOS TXT id.server @1.1.1.1 (and also 1.0.0.1)

1 Like

I agree :confused:

When I ping the site and run the dig command you shared, the ip address of the w3schools.com site comes up, but strangely when I enter the site, I get a error that the server ip address could not be found.

> $ dig @1.1.1.1 w3schools.com                                                 
; <<>> DiG 9.10.3-P4-Ubuntu <<>> @1.1.1.1 w3schools.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38781
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;w3schools.com.			IN	A

;; ANSWER SECTION:
w3schools.com.		1858	IN	A	66.29.212.110

;; Query time: 11 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Fri May 21 16:34:21 +03 2021
;; MSG SIZE  rcvd: 58

The result is the datacenter in Istanbul.

> $ dig +short CHAOS TXT id.server @1.1.1.1                                    
"IST"

Sorry, I see the issue was with the ‘www’ subdomain. Try:
dig @1.1.1.1 www.w3schools.com

1 Like

I tried again with www;

> $ dig @1.1.1.1 www.w3schools.com

; <<>> DiG 9.10.3-P4-Ubuntu <<>> @1.1.1.1 www.w3schools.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 64460
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; OPT=15: 00 16 ("..")
;; QUESTION SECTION:
;www.w3schools.com.		IN	A

;; Query time: 1243 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Fri May 21 16:50:56 +03 2021
;; MSG SIZE  rcvd: 52

Are you able to open a ticket here? If so, post the ticket # here. If not, then we can tag a staff member to look at it.

To contact Cloudflare Customer Support, login & go to https://dash.cloudflare.com/?account=support and select get more help. If you receive an automatic response that does not help you, please reply and indicate you need more help.

1 Like

Thanks for your help. I opened a support ticket.

What ticket number is it?

#2164425

That number. But I’m not sure if you can access it.

https://support.cloudflare.com/hc/en-us/requests/2164425

1 Like

I can’t, but Cloudflare staff check in on tickets posted here to make sure they’re being taken care of.

1 Like

Is there any update regarding this issue? It still throws SERVFAIL in Istanbul data center.

; <<>> DiG 9.16.16 <<>> www.w3schools.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 4278
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; EDE: 22 (No Reachable Authority)
;; QUESTION SECTION:
;www.w3schools.com.             IN      A

;; Query time: 2159 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Thu May 27 18:06:27 +03 2021
;; MSG SIZE  rcvd: 52