Is there a problem with DNS?
Typically, DNS errors are caused by problems on the user end, whether that’s with a network or internet connection, misconfigured DNS settings, or an outdated browser. In other cases, you may need to disable connections, change DNS servers, or flush the DNS cache.
What is DNS failure mean?
DNS errors occur essentially because you’re unable to connect to an IP address, signaling that you may have lost network or internet access. DNS stands for Domain Name System. In other words, the DNS translates your web domain name into an IP address and vice versa.
Where does the DNS point in SharePoint Stack Exchange?
Your DNS entry (sp-apps.portal.com) should point to your Web Front server where the Web Application is provision. If you are using the SSL, then you need a SSL cert. You have to bind the SSL cert in IIS with the web application. Thanks for contributing an answer to SharePoint Stack Exchange!
Is it safe to use external DNS server in Windows NT?
Windows NT does not. Using external promiscuous proxy DNS servers run by people with whom you have no contractual relationship is a bad idea anyway. You wouldn’t use an external proxy HTTP server like that; nor would you route your mail through an external SMP Relay server where you didn’t have an agreement with the server owners.
Do you need to run two internal DNS servers?
DNS is the lifeblood of a modern IP network so it’s important to keep running. In a internal network with internal-only DNS records you would need to run two internal DNS servers if you wanted failover redundancy… simply sticking an external IP (4.2.2.2) as the 2nd will not work well (as you’ve seen).
Where does the forward lookup zone point in DNS?
Looking in DNS I can see the Forward Lookup Zone has the server in there. On an AD network, for all domain members (workstations, laptops, servers) you should ONLY have their TCP/IP Properties point to an internal AD DNS server for resolution, ideally two different DNS servers.