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DNSDNS

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other re...

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Network Architect

Over 15 years' experience in enterprise network design and implementation focused on routing, switching, Wi-Fi and Cisco ISE.

Troubleshooting Solution

Where should I create my PTR record if we plan to use GoDaddy Premium as my DNS ?

18

Background

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1 We have our own EMail Server Exchange 2016 with a dedicated public IP leased

Article

DNS Troubleshooting made easy

6
Most DNS problems are VERY easily troubleshot and identifiable if you can follow the steps a DNS …
Video
Video
Video
Post

Microsoft has identified a security (DNS) vulnerability that…

1
Microsoft has identified a security (DNS) vulnerability that attackers can exploit and has released …
Troubleshooting Solution

Bind: resolution requests denied

12

I have bind9 running on Ubuntu focal.

name resolution is working from within the server but not from

Troubleshooting Solution

Emails stuck in exchange 2016 queues

18

Emails are stuck in queues on an Exchange 2016. I checked DNS, Connectors, Certificates, Virtual

Post

CloudFlare and APNIC have launched a free DNS service @ …

3
CloudFlare and APNIC have launched a free DNS service @ 1.1.1.1 that claims to prevent your ISP from…
Troubleshooting Solution

Ubuntu Groovy can not resolve name

13

I am running Ubuntu 20 groovy

the DNS is set to 8.8.8.8 and I can ping this IP but I can not resolve

Troubleshooting Solution

Win 7 Internet connection

bymcrmg
88
Hi,

We have a pc was rebuilt. WIFI works fine on that pc, but when we plug in a cable. The …
Troubleshooting Solution

Create SPF Text Record.

byDahoe
25
Hi there,

a company i'm working with are having problems with some of their emails being rejected as …
Troubleshooting Solution

RDNS File not loading with Out of range and NS and SOA Errors

12

Trying to get RDNS working on an Ubuntu 20.04LTS system. the files goes through named-checkzone just

Post

It's always exciting around here! We're thrilled to …



It's always exciting around here! We're thrilled to expand our partnership with ConnectWise
Troubleshooting Solution

How can I find all forward/reverse dns records for a domain?

10

Dig domain.com

I can get all the records based on domain.com

Say: dig domain.com ANY


However, the

Post

The Global Cyber Alliance has a new DNS service to help …

The Global Cyber Alliance has a new DNS service to help combat malware - check out Quad9
Troubleshooting Solution

AutoDiscover or Outlook Anywhere in Coexixiting envornment with(Exchange 2010 and Exchange 2016)

bySe Lai
84
All Virtual Directories in Exchange 2010 and Exchange 2016 has been configured with same …
Troubleshooting Solution

How to set domain users as guests in windows 10?

7

Hello IT people :)


How to set domain users in active direcory as guests in windows 10?

Let me describe

Troubleshooting Solution

Can there more tech detail on why Facebook went down yesterday beside DNS & Routers

byjana
10

Hi Experts!


Yesterday Facebook went down and their apps WhatsApp, Instagram etc. the reason that FB

Troubleshooting Solution

DNS multiple clients with same IP address

8

Hello,

My question DNS has multiple clients with the same IP address one with a time stamp of

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