How to check if the website is inaccessible? Share efficient diagnostic skills

for website operators or ordinary users, website inaccessibility is a common but difficult problem, small to affect a single browsing experience, large to bring serious losses such as traffic loss and brand damage to the enterprise. Many people will be flustered when encountering such problems, blindly trying various methods but can't find the root cause. This article will share a system of website inaccessibility troubleshooting and diagnosis skills from local to server, from surface to deep, to help you quickly locate the problem and restore the normal operation of the website in time.

First, check the local environment to cause the website to be inaccessible?

many times the website cannot be accessed is not the problem of the website itself, but the local equipment or network environment is abnormal, which is the most easily ignored but also the easiest to check.

1, check the local network connection status

first confirm whether the device is normally connected to the Internet, you can try to open other commonly used websites or use mobile phone traffic hotspots to switch network tests. If the website can be accessed normally after switching the network, it means that it is a problem with the current local network. You can restart the router, reset the network settings or contact the network service provider to solve it; if all networks cannot be accessed, then turn the investigation focus to the website itself.

2, clear the local browser cache and Cookie

old data cached by the browser may conflict with the latest content of the website, resulting in the website being inaccessible or loading abnormally. Open the browser settings, find the Clear Browsing Data option, tick Cached Files, Cookies and History, perform the clear operation, and then restart the browser to try to visit the website again, which can solve the problem in some cases.

Second, the detection server status troubleshooting website can not be accessed?

if there is no problem with the local environment, the reason why the website cannot be accessed is likely to be on the server side, the server is the core carrier of the website operation, and any abnormality will directly affect the availability of the website.

1, through the tool to detect the server online status

can use Webmaster Tools, Ping command or online server detection platform to enter the Internet Protocol Address of the website server for detection. If the Ping command returns a timeout or the packet loss rate is too high, it means that the server network connection is abnormal; if the detection result shows that the server is offline, it may be caused by server hardware failure, power outage in the computer room or maintenance by the service provider. Please contact the server hosting provider in time for details.

2, check the server resource usage

log in to the server background management panel to view the occupancy rate of resources such as CPU, memory, disk space, etc. If a resource occupancy rate is close to 100%, for example, if the disk space is full, the website cannot write data and cannot be accessed. Insufficient memory will force the website process to terminate. At this time, you can clean up the server redundant files, close unnecessary processes, or upgrade the server configuration to solve the problem.

Third, troubleshooting domain name resolution abnormality causes the website to be inaccessible?

domain name is the entrance of the user to access the website, the problem of domain name resolution will directly lead to the user cannot find the server through the domain name, and then the website cannot be accessed.

1, check whether the domain name resolution record is normal

log in to the domain name registrar background to check whether the A record and CNAME record of the domain name are correctly configured to ensure that the resolved server Internet Protocol Address is consistent with the actual server IP. You can also use the online domain name resolution query tool to enter the domain name to view the resolution result. If the resolution record is wrong or not effective, you need to modify the resolution and wait for it to take effect. Usually the resolution takes 10 minutes to 24 hours.

2, confirm whether the domain name status is normal

check whether the domain name is in an expired, locked or abnormal state of filing. After the domain name expires, it will be suspended by the registrar, resulting in the inability to access the website; the domain name that has not been filed cannot be used normally in the domestic server, and the abnormal filing information may also be suspended by the management bureau. If the domain name expires, it needs to be renewed in time. If the filing is abnormal, contact the filing service provider to complete the rectification.

Fourth, check the website procedures and permissions to cause the website to be inaccessible?

exclude external factors, the program code or file permissions of the website itself are also common deep-seated reasons for the inaccessibility of the website.

1, check whether the website program error

If the website uses a CMS system or a custom development program, you can view the server's error log file, which will record the error information when the program is running, such as code syntax errors, plug-in conflicts, database connection failures, etc. Locate the problem code according to the error prompt, and restart the website service after fixing the error. If you can't solve it yourself, you can contact the website developer or technical service provider to assist in handling it.

2, verify website files and directory permissions

server has strict permission settings for website files and directories. Too high or too low permissions may lead to inaccessible or abnormal functions of the website. Generally speaking, it is recommended to set the website file permissions to 644 and the directory permissions to 755 to avoid setting 777. Too high permissions cause security risks or server interception. You can modify permissions through the server file management tool, and then refresh the website to test whether it returns to normal.

to sum up, the website inaccessible troubleshooting needs to follow the logical order from local to server, from surface to deep, first eliminate the local network, browser cache and other easy-to-solve problems, then gradually detect the server status, domain name resolution, and finally troubleshoot the website program and permission problems. This system of troubleshooting skills can help you quickly locate the root cause and reduce the negative impact of website inaccessibility, whether ordinary users or operators can easily master and apply.