The free .edu email has always been wanted by many people. The reason is that there are many paid resources abroad, such as VPS hosts, domain names, software, etc., which are provided to students for free. The way to verify students is basically to have an educational email. That’s it. Earlier, domestic .edu.cn email addresses could also be used to apply for foreign space and domain names, but now you may need to upload documents.

Generally speaking, when you purchase a VPS host, you will receive a free IPv4 address (some NAT VPS are shared IPs and will give you a URL address after purchase, such as CloudIPLC and Uovz VPS). Some VPS host providers (such as Linode and DigitalOcean) will also give you one as a gift. IPv6, and the IPv6 address will be automatically enabled after the VPS is successfully created.

LNMP is a very classic one-click installation package for Nginx/MySQL/PHP and other web environments. It supports Nginx, Apache or front-end Nginx + back-end Apache. It supports multiple PHP versions (currently PHP 7.3 can be installed) and common caching components such as Redis/Xcache. Install.

WHMCS and Cpanel are actually a pair and have been used in practice by major hosting providers. They also work best together. However, many other host panels have also developed WHMCS interfaces, which can enable self-service activation of virtual hosts and sales of host space products like WHMCS+Cpanel.

Since its launch last year, its Yunfu host has been using HDD hard drives. However, during actual use, it was found that if the HDD hard drive is not used as a Raid (disk array), the IO read and write speed will be slower, which not only affects the experience of VPS users, but also If the number of users continues to increase, it will still affect the stability of the main server.

SkySilk is a newly established VPS hosting merchant in the United States (the specific establishment time is uncertain, and the merchant’s promotional materials can be traced back to May 2018). When SkySilk was first established, it seemed that it started to pursue the path of low-priced VPS hosting, priced at US$1/ Monthly VPS hosting, and after binding a credit card, you can get a free VPS hosting for one year. However, now you don’t need a credit card. You only need to bind a Paypal account (no payment required) to get a VPS host for free.

There are many friends who have built foreign trade websites who want to restrict their websites from being accessed by domestic IPs. There are also some friends whose websites store resources that need to be blocked from specific IPs for various reasons. Some friends have seen attacks. Most of the source IPs come from abroad, and you want to prevent foreign IPs from accessing the website.

Regarding the problem of the Linux disk being full, I have encountered it before when using the WDCP panel because the website log was enabled in the background of the panel, but the log was not deleted regularly. In the long run, the disk space of the VPS host was filled up with logs. When the disk space reaches 100%, some inexplicable errors will occur on the website, such as being unable to log in to the background, unable to comment, and the page is blank, etc.

A friend put his corporate website on his cloud host, and the traffic was not large. However, because it was used and was often attacked by CC, the main manifestation was that the IO and CPU increased sharply. Finally, the database hung up and the website became inaccessible. Cloudflare was enabled at the beginning, but the attacker scanned frantically and the defense effect was average.

Recently, when a friend was using his Yunfu host, he discovered that SSH has been violently scanned by others. Although the SSH account and password have never been guessed, if someone keeps staring at him, something will happen sooner or later. I helped him set up an S-S-H login whitelist, which only allows login access from his own IP, and rejects all other IPs.