Analysis of the reasons for conflicts between CNAME and MX records

When configuring domain name resolution, many people encounter a seemingly inexplicable problem: They simply want to point a domain to a service, but after adding a CNAME record, the MX record fails to configure correctly, or conversely,

What are some methods to test whether domain name resolution is working?

In scenarios such as website deployment, server migration, CDN integration, and DNS switching, "whether domain name resolution is effective" is an unavoidable issue. Many people have had this experience: the DNS has been clearly modified,

How is DNS round-robin implemented? A complete guide from theory to practice.

When optimizing website architecture, many people's first encounter with load balancing isn't with complex Layer 4 or Layer 7 methods, but rather with the simplest and most "primitive" method—DNS ​​Round Robin. It doesn't require complex equipment

How does the SSL security protocol achieve data encryption? A complete analysis of the handshake to session process.

When a user enters a URL in their browser and presses Enter, the first thing this action triggers is not to directly encrypt the data.

Implementation mechanism and precautions of DNS round-robin

DNS round-robin, simply put, involves configuring multiple IP addresses for the same domain name on a DNS server. When a user initiates a resolution request, the DNS server returns different IP addresses in a round-robin order,

What aspects does website security testing include? How can testing be conducted effectively?

What exactly does website security testing encompass? Ten years ago, the answer might have been simple: testing for SQL injection and XSS vulnerabilities was enough. But that's no longer the case. A modern website is supported by dozens, even hundreds,

Detailed Explanation of the Principles and Advantages of Wildcard SSL Certificates

In terms of working principle, wildcard domain certificates, like regular SSL certificates, use asymmetric encryption technology to ensure the security of data transmission between the client and the server. The certificate contains a public key digitally

What is an ECC certificate? How does it differ from an RSA certificate?

This is actually a common dilemma faced by many developers and administrators. Everyone sees that little green padlock in the browser address bar every day and knows that HTTPS protects data security, but they often don't pay much attention to

What are some solutions for browser certificate errors?

What is dynamic domain name? An introduction to its working principle and usage scenarios.

Why does my IP address keep changing? It was fine yesterday, but it's not working today. "This is actually the scenario most ordinary people encounter when they first come into contact with dynamic domain names. You might know what a domain name is,