Essential DNS Troubleshooting For Reliable Website And Email Access

The Domain Name System (DNS) service is required to access e-mail, browse Web sites and use hostnames in general. DNS resolves hostnames to IP addresses and back (e.g. www.cyberguard.com translates to 64.94.50.88). This article details how DNS works under normal circumstances and provides troubleshooting tips. . . .

The Domain Name System (DNS) service is required to access e-mail, browse Web sites and use hostnames in general. DNS resolves hostnames to IP addresses and back (e.g. www.cyberguard.com translates to 64.94.50.88). This article details how DNS works under normal circumstances and provides troubleshooting tips.

It is important to note that DNS servers essentially comprise a distributed database of hostnames to IP addresses. DNS traffic flow is quite simple. When troubleshooting inbound, be mindful of SOA records and request resolution from the authoritative DNS server. Conduct outbound troubleshooting from the DNS client to the DNS server(s).

The link for this article located at Cyberguard.com, Gideon T. Rasmussen is no longer available.