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How to check a domain's WHOIS expiration date? How to prevent expired domains from being registered by others?
Regarding the WHOIS expiration date of a domain, what I really want to say is: checking the expiration date itself is simple; the real difficulty lies in understanding the information and status codes WHOIS provides. Too many people just glance at the
What are the differences between a free DV SSL certificate and a paid OV certificate?
To be honest, seeing that little green padlock in the browser's address bar when buying things online or logging into an account gives me a sense of security. But have you ever noticed that while some websites display the company name when
What to do if DNS resolution for a domain fails? Common causes and solutions.
You can send messages and watch videos on WeChat, but when you open a browser and enter a website address, you just can't access it, getting messages like "Server IP address not found" or "DNS_PROBE_FINISHED_NXDOMAIN". Many people's first
What are the differences between free and paid SSL certificates? Is it necessary for personal blogs to buy paid SSL certificates?
If you're setting up your first personal blog, should you use a free SSL certificate or grit your teeth and buy a paid one? In many people's minds, "free" seems to be associated with "not good enough" or "having traps." Meanwhile, the overwhelming
What to do if you forget your SSL certificate private key password? Detailed explanation of CSR and key regeneration.
In actual operation and maintenance, many administrators encounter a frustrating problem: they can find the SSL certificate, but have forgotten the private key password. This is especially true during website migrations, server reinstalls, ADSL IP access,
Must e-commerce websites use EV SSL certificates? What's the difference between a green padlock and regular HTTPS?
In recent years, discussions about SSL certificates have undergone subtle changes. Previously, the debate centered on "whether websites should use HTTPS"; later, the debate shifted to "whether free DV certificates are sufficient"; and now, a crucial
What to do if your SSL certificate private key is leaked? Quick remedial measures
An SSL certificate private key leak isn't a huge deal, but it's not insignificant either. If you don't address it, and attackers use your private key to cause harm, you'll understand what it means to be "sold out while still helping the
How to seamlessly change DNS resolution during website migration? Methods to minimize downtime.
Website migration, while not a major undertaking, isn't insignificant either. But there's one thing every website owner dreads—after switching DNS, some users can access the site, while others can't; emails won't send, APIs won't work, and users will
Why are changes to the DNS server not taking effect? How to refresh the local DNS cache?
Many website owners have likely encountered this situation: you've changed the DNS server address with your domain registrar, and the system indicates a successful change, but after waiting for half a day, or even a day or two, the website is
What should be considered when transferring a domain name in or out? How to avoid the 60-day lock-up period issue?
Anyone who runs a website knows that a domain name is like your address on the internet. If you want to switch registrars and move your domain, it seems simple, but in practice, there are many pitfalls. I've seen too many people get stuck
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