Can't ping OpenDNS with my ISP Numericable

[ppodns]

Hi,

My ISP is Numericable in France, and the modem model is Sagemcom F@ S T 3284DC

I use factory setting, I do not make any change to the modem configuration.

On windows 10 latest version, I get a ping error on 208.67.222.222 and 208.67.220.220

However I am able to ping other DNS services, like FDN DNS 80.67.169.12

Does it mean that my ISP specifically blocks OpenDNS?

I can give you my IP address if that helps for you to do forensicks.

[rotblitz]

Why would you use ping? It is almost good for nothing, at least for what you want to achieve, to check for OpenDNS. Unlike DNS which uses UDP and TCP and port 53, ping uses ICMP and is portless.

You better test like this:
nslookup -type=txt debug.opendns.com. 208.67.222.222

[ppodns]

Hi, thanks for the tip. I also do get an error

nslookup -type=txt debug.opendns.com. 208.67.222.222

DNS request timed out.
timeout was 2 seconds.
Serveur : UnKnown
Address: 208.67.222.222

DNS request timed out.
timeout was 2 seconds.
*** Le délai de la requête sur UnKnown est dépassé.

Assuming there was one space too many in your command, this is what I get:

nslookup -type=txt debug.opendns.com.208.67.222.222

Serveur : ns1.numericable.net
Address: 89.2.0.1

Réponse ne faisant pas autorité :
debug.opendns.com.208.67.222.222.numericable.fr canonical name = nc-ass-vip.sdv.fr

sdv.fr
primary name server = dns1.sdv.fr
responsible mail addr = hostmaster.sdv.fr
serial = 2020071305
refresh = 21600 (6 hours)
retry = 3600 (1 hour)
expire = 3600000 (41 days 16 hours)
default TTL = 172800 (2 days)

[rotblitz]

The DNS traffic connection (port 53) to OpenDNS is being blocked, most likely by your ISP.  Call them to opt out from this restriction.

Alternatively, you can install the DNSCrypt proxy (https://dnscrypt.info/ or https://www.dnscrypt.org/) which can work on alternative ports like 443 or 5353.

And no, I did not mistype the command, the space had to be there.  So your second output does not give useful information, just that you're using your ISP's DNS service (Serveur : ns1.numericable.net, Address: 89.2.0.1) and that you have a DNS suffix (numericable.fr) configured.  Things which also could be seen from a "ipconfig /all".

[ppodns]

Hi it looks like the ISP fixed on its side.

nslookup -type=txt debug.opendns.com. 208.67.222.222
Serveur : resolver1.opendns.com
Address: 208.67.222.222

Réponse ne faisant pas autorité :
debug.opendns.com text =

"server r7.cdg1"
debug.opendns.com text =

"flags 40020 0 50 180000000000000000003B50000000000000000"
debug.opendns.com text =

"originid 436168886"
debug.opendns.com text =

"actype 2"
debug.opendns.com text =

"bundle 12771476"
debug.opendns.com text =

"source [my ip address]:57812"

[rotblitz]

Correct, they have fixed it.  Enjoy!