What should I do if there is an HTTPS certificate error? Detailed explanation of common causes and handling methods

when visiting HTTPS encrypted websites, many users or operation and maintenance personnel will encounter HTTPS certificate error prompts, which will not only block normal website access, but also may cause users to question the security of the website. In fact, HTTPS certificate errors are not unsolvable, and there are often clear triggers behind them. From the status of the certificate itself to the settings of the client, it may become an incentive. This article will comprehensively dismantle the common causes of HTTPS certificate errors and give targeted solutions to help you solve such problems efficiently and restore normal access and security trust of the website.

Common triggers for HTTPS certificate errors?

to solve the HTTPS certificate error, it is first necessary to clarify the trigger reason behind it, and different causes correspond to different processing directions.

1, the certificate exceeds the validity period

HTTPS certificates have a fixed validity period, as short as 1 year, as long as 3 years. When the certificate expires, the browser will determine that it has lost its validity and directly pop up the HTTPS certificate error prompt. This kind of situation is more common in small and medium-sized websites. Many operation and maintenance personnel easily ignore the expiration reminder of the certificate, resulting in access problems after the certificate expires.

2, the certificate does not match the domain name

HTTPS certificate is bound to a specific domain name. If the website changes the domain name, or the domain name filled in when the certificate application is inconsistent with the currently visited domain name, an HTTPS certificate error will occur. For example, if you apply for a www.example.com certificate, but use it to deploy example.com domain name, or deploy it on an unauthorized subdomain, the domain name does not match error will be triggered.

3, the certificate is not trusted by the browser

some websites will use self-signed certificates, which have not been certified by a globally trusted root certificate authority. Browsers cannot verify their legitimacy, so an HTTPS certificate error message will pop up. In addition, if the certificate authority itself is not included in mainstream browsers, it will also lead to the problem that the certificate is not trusted.

Second, ordinary users encounter HTTPS certificate error how to do?

ordinary users encounter HTTPS certificate errors when browsing the website, there is no need to panic too much.

1 Check the current system time setting

browser will verify the validity period of the HTTPS certificate through the system time. If the local system time is incorrectly set to a future or past date, it may misjudge that the certificate has expired or not valid, and then pop up the HTTPS certificate error prompt. At this time, just adjust the system time to the current correct Beijing time, and then refresh the page.

2, confirm whether the website domain name is correct

if there is a spelling error in the entered domain name, access to the fake or not correctly deployed certificate website, there will be HTTPS certificate error. At this time, you need to carefully check whether the domain name is correct. If you confirm that the domain name is correct but still prompt an error, it is recommended to temporarily stop accessing to avoid entering the phishing website suffered from information leakage.

3, clean browser cache and certificate information

old certificate information cached by the browser may conflict with the new certificate of the current website, causing an HTTPS certificate error. Users can go to the browser settings page, find the privacy and security options, clean the browsing cache and saved certificate information, and then restart the browser to access the website. In most cases, this kind of cache error can be solved.

3. How can website operation and maintenance personnel fix HTTPS certificate errors?

for website operation and maintenance personnel, HTTPS certificate errors directly affect user experience and website trust, and need to be professionally repaired in a timely manner.

1, renew or reapply for HTTPS certificates

If the HTTPS certificate error caused by the expiration of the certificate is found, the operation and maintenance personnel need to apply to the original certificate authority for certificate renewal as soon as possible, or reapply for a new HTTPS certificate. When applying, ensure that the domain name information is accurate. After the renewal or new certificate is issued, complete the certificate deployment on the server in time, and restart the corresponding Web service to ensure that the new certificate takes effect.

2, check the matching of domain name and certificate

when there is an HTTPS certificate error that does not match the domain name, the operation and maintenance personnel need to check the list of domain names bound to the certificate to confirm whether the currently deployed domain name is within the scope of authorization. If you need to support multiple subdomains, you can apply for a multi-domain certificate or a wild-card certificate to avoid HTTPS certificate errors caused by domain name extension.

3, replace the trusted formal certificate authority

using a self-signed certificate or a certificate issued by a niche authority causes an HTTPS certificate error, it is recommended to replace it with a certificate from a globally trusted formal certificate authority, such as Let's Encrypt, DigiCert, etc. The certificates of such institutions are included in all mainstream browsers, which can effectively avoid the problem of untrusted certificates. At the same time, some institutions also provide free basic certificates to reduce operation and maintenance costs.

sum up, the HTTPS certificate error processing needs to distinguish between user identity and error causes, ordinary users can adjust the system time, check the domain name, clean up the cache to solve, operation and maintenance personnel need to check and repair from the valid period of the certificate, domain name matching, authority trust and other dimensions. As long as the core incentives of HTTPS certificate errors are identified and operated according to the corresponding scheme, the safe access of the website can be quickly restored to ensure the user's browsing experience and information security.