Mailwizz服务卖家 https://scribeage.com/services/
DNSSEC检查检测工具 https://dnssec-debugger.verisignlabs.com/
软件替代品 https://www.saashub.com/
png图片工具 https://favpng.com/
Discuz表结构 https://addon.dismall.com/library/database/x3/x3_index.html
临时邮箱 https://www.temporary-mail.net/
php安全最佳实践 https://www.cyberciti.biz/tips/php-security-best-practices-tutorial.html
adobe的ai创作 https://firefly.adobe.com/
文件格式转换，包括图片 https://cdkm.com/
支持不支持？ https://caniuse.com/
代理测试IPv6网站内容 https://ipv6proxy.cn
IPv6知识：http://www.makikiweb.com/
支持IPv6的网站top https://bgp.he.net/ipv6-progress-report.cgi
IKEv2 https://surfshark.com/blog/ikev2-vpn
http3/quic检查 https://http3check.net/
图标ico和logo和banner相关的几个：
https://www.icoconverter.com/
https://www.shareicon.net/
https://www.logomaker.com.cn/
https://www.qt86.com/
Linux服务器网络流量统计 https://humdi.net/vnstat/
nginx配置文件自动生成
https://www.digitalocean.com/community/tools/nginx?global.app.lang=zhCN
https://www.tweaked.io/
证书购买 https://www.gogetssl.com/
无版权素材 https://stocksnap.io/
干净的IP地址 https://mxtoolbox.com/blacklists.aspx
原生IP https://bgp.he.net/
解释shell命令的网站：https://www.shell.how/
ssh深入讲解 https://blog.haojunyu.com/post/deep_ssh/
ssh-agent讲解 https://www.jianshu.com/p/12de50582e63
ssh各种玩法 https://blog.hufeifei.cn/2021/02/Linux/ssh/index.html
看看自己shell是啥德行 https://www.moncefbelyamani.com/which-shell-am-i-using-how-can-i-switch/
ssh后门 https://medium.com/@sec_for_safety/ssh-backdoor-how-to-get-a-proper-shell-on-the-victims-machine-52d28fe6dde1
计算域名剩余天数： https://askubuntu.com/questions/1200944/bash-script-to-calculate-remaining-day-counts-for-domain-expire
非京籍需要关注的网站网址APP