What should I do if the HTTPS request is abnormal? Detailed explanation of common causes and handling methods

HTTPS has become the standard for network access, HTTPS request abnormalities have become a common problem encountered by many users and developers. It may be manifested in various forms such as browser prompts that the webpage is insecure, request timed out, interface call failure, etc., which not only affects the normal total page browsing experience, but also may hinder the normal operation of the business system. This article will deeply dismantle the common incentives for HTTPS request abnormalities, starting from multiple dimensions such as certificates, networks, servers, client sides, etc., to provide you with a system of troubleshooting ideas and landing solutions to help you quickly resolve such network problems.

Common triggers for HTTPS request exceptions?

to solve the HTTPS request exception problem, we must first identify the root cause of the problem, different incentives correspond to different processing directions.

1, SSL/TLS certificate abnormal

this is the most common cause of HTTPS request exceptions, such as the certificate has expired, the certificate chain is not properly configured, the certificate domain does not match the access domain name, or the certificate is an untrusted self-signed certificate, will be judged by the browser or client side as insecure, directly intercept the request.

2, network environment restrictions

some enterprises or public networks will set up firewalls and proxy servers. If these devices do not properly release HTTPS port 443, or illegally intercept SSL/TLS traffic, HTTPS requests will be abnormal, and connections will be timed out or rejected.

3, server configuration error

if the server side does not open the encryption protocol of TLS 1.2 and above, or configures an incompatible encryption suite, it will cause the client side to fail to establish a secure connection with the server, which will cause an HTTPS request exception. In addition, server resource overload and port occupation will also affect the normal response of HTTPS requests.

Second, HTTPS request abnormal certificate class troubleshooting method?

when encountering an HTTPS request exception, it is the most direct and efficient way to prioritize troubleshooting certificate-related problems.

1, check the validity of the certificate

open the browser's developer tools, check the certificate details in the security tab to confirm whether the certificate is within the valid period, and whether the domain name matches the currently visited domain name, including the correspondence between the main domain name and the subdomain name. If the certificate expires, you need to apply for renewal to the CA agency in time; if the domain name does not match, you need to re-issue the certificate of the corresponding domain name.

2, verify the integrity of the certificate chain

part of the HTTPS request abnormality is caused by the incomplete certificate chain. The server only configures the server certificate and does not configure the intermediate certificate, so that the client side cannot complete the verification of the certificate trust chain. You can use the online SSL detection tool to check whether the certificate chain is complete. If there is any missing, you need to obtain the corresponding intermediate certificate from the CA authority and add it to the server configuration.

3 Handling self-signed certificates

development testing environment. Such certificates are not recognized by public trust authorities and will cause HTTPS request exceptions. At this time, you can manually import the certificate in the client side browser or test tool and add it to the trust list to establish an HTTPS connection normally.

Third, HTTPS request abnormal network and server troubleshooting?

eliminate the certificate problem, it is necessary to start from the network environment and server configuration to troubleshoot the deep reasons for the abnormal HTTPS request.

1, detect network ports and proxy

first use telnet or curl command to test whether port 443 can be connected normally. If the connection fails, it means that the network firewall or proxy server has intercepted HTTPS traffic. At this time, you need to contact the network administrator to confirm whether port 443 is released, whether the proxy server supports HTTPS request forwarding, and adjust network rules if necessary.

2, check the server encryption configuration

log in to the server to check the SSL/TLS configuration, confirm whether the security protocols such as TLS1.2 and TLS1.3 are turned on, disable the outdated SSL3.0, TLS1.0 and other weak protocols, and select the mainstream encryption suite, such as ECDHE-RSA-AES256-GCM-SHA384. If the configuration is wrong, restart the server service after modification, and then test whether the HTTPS request returns to normal.

3, check the server resource status

the server CPU, memory usage is too high, or the process occupies port 443, it will also cause abnormal HTTPS requests. You can use commands such as top and netstat to view the server resource usage and port usage. If the resource is overloaded, you need to optimize the business code or upgrade the server configuration; if the port is occupied, release the corresponding port or replace the HTTPS listening port.

four, HTTPS request abnormal client side troubleshooting method?

in addition to server level and network issues, the client side's own configuration may also cause HTTPS request exceptions, which cannot be ignored.

1, clean browser cache and certificate

old certificate information cached by the browser or incorrect security configuration may cause abnormal HTTPS requests. You can clean the browser's cache and cookies, and delete expired or invalid certificates in the browser's Certificate Management Center, and then revisit the destination page to see if the connection can be established normally.

2, update the browser or client side version

older versions of the browser or client side may not support the latest TLS protocol or encryption suite, causing HTTPS request exceptions. Updating the browser or client side application to the latest version in time will provide better compatibility and solve the request problem caused by the version is too low.

To sum up, the troubleshooting and processing of HTTPS request abnormalities needs to be multi-dimensional from the certificate, network, server, and client side, first locate the root cause of the problem, and then implement the solution in a targeted manner. Daily certificate cycle management, regular inspection of server configuration, and maintaining client side software updates can effectively reduce the occurrence of HTTPS request abnormalities and ensure the safety and smoothness of network access.