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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

How to change nameservers on Fedora Core release 4 (Stentz)

byHD LF
29
I have been trying to change the DNS servers on our Fedora server but /etc/resolv.conf is read only …
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
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

Windows domain DNS issues!

byGibo
34
Multiple Host A records on the same IP address in domain DNS servers? Is that valid?
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

Exchange 2010 Initialization Failed.

byDahoe
32
Hi there,

after running updates last night the Exchange 2010 on SBS 2011 has stopped.

When starting …
Troubleshooting Solution

NSLOOKUP results are correct?

byeemoon
23
Hi
In Windows2008, A record is configured in DNS with acme.com to 192.168.1.153
Now I dont know why …
Troubleshooting Solution

What am I missing in my DNS to have valid emails and not beeing categorized as spam?

33
Hi,
Some clients of us are blocking our mails coming to them.
ProofPoint told them that :
" We're seeing
Troubleshooting Solution

NSLOOKUP failing on second dns server

43
I have 2 dns servers on our network
server13
       windows server 2008 R2
server18
       …
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

Internet speed is slow due to DNS or virus?

byeemoon
10
Hi Recently my internet speed is very slow. It looks like DNS has some issue because it takes long …
Troubleshooting Solution

Unable to get Hulu on Apple TV in Canada

8
Hi guys,

I setup my wife with a hulu account here in Canada originally and was unable to get it work …
Troubleshooting Solution

Domain Controller and Desktop DNS

27
I have setup my first Windows Server 2019 with AD and DNS and DHCP.  Everything works fine.  My …
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

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 …
Research Solution

Make a VM server and host part of the domain?

byCTSLA
10
Until recently, a client has had a single server that had the roles of PDC and file server. This …
Troubleshooting Solution

Move controller/DNS server ip address

byeemoon
7
Hi
I failed to to move controller ip address. Hope someone give some suggestion. Controller (with DNS …
Troubleshooting Solution

Disable negative caching in Windows DNS service

byzc2
27
This is a follow up for this question since the problem still is not resolved.

We have an hMailServer …

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