Test if the website is down http://ce.cloud.360.cn/ There are many tools that can monitor whether a website is down? Of course, V2EX is also one of them. When a website is inaccessible, there are many reasons? GFW? Your own network? The website itself? It is difficult to find out whether the website is down by yourself. There are too many such tools. I have selected the following tools for reference only.
http://downforeveryoneorjustme.com/baidu.com
- All domestic tools are not recommended, unless it is a website with a domestic IP address; Site24x7 free version is not recommended because it has too few functions
2.deez.io (used by the author's website, recommended) https://deez.io/
3.statuscake (recommended) https://www.statuscake.com/
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uptimerobot (best, free version preferred) http://uptimerobot.com/
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Pingdom (paid) http://www.pingdom.com/
6.port-monitor (recommended) https://www.port-monitor.com/
7.monitority http://monitority.com/
8.pingoscope http://pingoscope.com/
- Sitedown (check if the website is down) http://sitedown.co/
10.isitdownrightnow http://www.isitdownrightnow.com/
11.alertimizer http://www.alertimizer.com/
12.uptimeweb http://www.uptimeweb.co.uk/
13.downornot http://www.downornot.net/
14.100pulse http://www.100pulse.com/
- monitor (recommended) http://www.monitor.us/en/website-monitoring
16.monitorhub http://www.monitorhub.com/
17.montastic http://montastic.com/
- uptimedoctor http://www.uptimedoctor.com/zhcn/ (recommended, Chinese version available)
19.anturis https://anturis.com/
20.insping https://www.insping.com/
Open source tool 21.mist https://mist.io/
22.redotheweb http://www.redotheweb.com/uptime/
Comment: There are too many tools of this type! I believe the tool recommended by the OP can definitely meet everyone's needs. Please search for the usage method yourself. Do you have a better tool?