Table of Contents (Jump to section)
Introduction
In our ongoing commitment to maintaining a secure and reliable network, we have recently taken the precautionary measure of blocking DNS traffic across our network. This decision was made in response to a growing risk of (DDoS) attacks specifically targeting DNS servers, which can disrupt network services and compromise security.
DNS resolvers / servers used:
To ensure that your servers continue to function, we recommend configuring them to use the following DNS resolvers / servers:
NetForChoice.com DNS
89.207.128.252
89.207.130.252
Cloudflare DNS
1.1.1.1
1.0.0.1
Google DNS
8.8.8.8
8.8.4.4
Quad9 DNS
9.9.9.9
149.112.112.112
Level3 DNS
209.244.0.3
209.244.0.4
Level3 DNS – alternative
4.2.2.1
4.2.2.2
4.2.2.3
4.2.2.4
Comodo DNS
8.26.56.26
OpenDNS
208.67.222.222
208.67.220.220
Please update your server configurations accordingly.
Summary & Verification
This article is designed to inform users about the blocking of DNS traffic and provide a list of DNS resolvers / servers which are not blocked.
Was this article helpful to you?
Your feedback helps us continuously improve our technical documentation.