curl命令在线工具：https://moneyslow.com/tools/curl.html
随机密码生成： https://moneyslow.com/tools/random_password.html
现在时间：time.is
软件平替soft alternatives https://www.saashub.com/
mac软件 https://moneyslow.com/mac-soft.html
各种开源软件安装教程 opensource soft https://moneyslow.com/i12bretro/
开源软件配置文件 https://moneyslow.com/html/webconf/index.html
网站优化 https://moneyslow.com/html/www.tweaked.io/index.html
无版权素材 unauthorized materials https://stocksnap.io/
PNG图片素材库 png tool https://favpng.com/
软件格式兼容测试 Compatibility https://caniuse.com/
Adobe AI https://firefly.adobe.com/
在线文件格式转换 File format convert https://cdkm.com/
Discuz3.4 download：https://www.dismall.com/thread-73-1-1.html
Discuz3.5 download：https://www.dismall.com/thread-14660-1-1.html
Discuz表结构 https://addon.dismall.com/library/database/x3/x3_index.html
Yaml格式校验 https://www.yamllint.com/
Linux管理员手册 Linux admin mannual：https://moneyslow.com/tldp.org/LDP/nag2/index.html
https://moneyslow.com/html/www.xmodulo.com/
https://moneyslow.com/html/kifarunix.com/
https://moneyslow.com/html/linuxdigest.com/index.html
https://moneyslow.com/html/smarttech101.com/index.html
查看iP地址ASN range https://hackertarget.com/as-ip-lookup/
digitalocean的工具箱 https://www.digitalocean.com/community/tools
付费便宜证书 https://www.gogetssl.com/
证书有效期检查https://moneyslow.com/html/prefetch.net/articles/checkcertificate.html
邮箱IP黑名单 https://mxtoolbox.com/blacklists.aspx
IPv6网站截图 check ipv6 website and screenshot : https://ipv6proxy.cn
IPv6 子网掩码计算：https://ipv6proxy.cn/subipv6/
IPv6 Address Lookup ：https://dnschecker.org/ipv6-whois-lookup.php
IPv6 tutorail：http://www.makikiweb.com/
IPv6 tutorail：https://moneyslow.com/html/metebalci.com/blog/hello-ipv6/index.html
IPv6 video：https://www.youtube.com/watch?v=EZKbOUwc63Q
IPv6 website top 10: https://bgp.he.net/ipv6-progress-report.cgi
IPv6 address examples: https://moneyslow.com/html/ipv6/docu/ipv6_address_examples.html
IPv6 hierarchical address plan:
https://moneyslow.com/html/ipv6/docu/hierarchical_address_plan.html
ipv6 reverse dns delegation:
https://moneyslow.com/html/ipv6/docu/ipv6_reverse_dns_delegation.html
IPv6 subnet mask caculator:
https://www.gestioip.net/cgi-bin/subnet_calculator.cgi
邮件端口探测:
telnet portquiz.net anyport
telnet alt3.gmail-smtp-in.l.google.com 25
Mailwizz server: https://scribeage.com/services/
《setup mailwizz server》
PowerMTA https://technicalsahil.com/how-to-install-setup-powermta-smtp-server-on-centos-7/
https://www.temporary-mail.net/
Docker mail server: https://mailu.io/
email title check： https://sendcheckit.com/
how to know email ip address clear? https://check.spamhaus.org/
Google email tools: https://toolbox.googleapps.com/apps/main/
Google email head check tools: https://toolbox.googleapps.com/apps/messageheader/
email record check tools: https://mxtoolbox.com/
send email ok test tool: https://www.lemwarm.com/deliverability-test
DKIM check: https://dmarcian.com/dkim-validator/
About DKIM(by japanese) https://baremail.jp/blog/2023/10/13/3528/
black list check https://multirbl.valli.org/lookup/
Google email bot ip: https://github.com/pksh71/gmail-bot-email-open-click-ip-ranges
shell解释：https://www.shell.how/
ssh教程：https://moneyslow.com/html/blog.haojunyu.com/post/deep_ssh/index.html
ssh-agent教程 https://www.jianshu.com/p/12de50582e63
SSH各种玩法: https://moneyslow.com/ssh-play.html
what fuck my shell: 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
ssh手册：https://www.openssh.com/manual.html
SSH转发：https://www.youtube.com/watch?v=g_Row8zEJZc
authorized_keys格式： https://0xda.de/blog/2021/03/authorized_keys-file-format/
Cloudflare secure check https://radar.cloudflare.com/
DNSSEC check tool https://dnssec-debugger.verisignlabs.com/
DNSSEC toturial：https://moneyslow.com/html/metebalci.com/blog/a-minimum-complete-tutorial-of-dnssec/index.html
DNSSEC error code https://developers.cloudflare.com/1.1.1.1/infrastructure/extended-dns-error-codes/
DNS SERVFAIL why? https://repost.aws/zh-Hant/knowledge-center/route53-dns-servfail-response
Header（CSP ）check https://securityheaders.com/
安全头最佳实践 How to WordPress header https://wordpress.org/support/topic/how-to-set-security-headers-correctly/
解释：https://www.koenli.com/bbc48d16.html
encryption security check Qualys
BGP security check https://isbgpsafeyet.com/
php security best practice https://www.cyberciti.biz/tips/php-security-best-practices-tutorial.html
php security check (by korean)：https://suhosin.org/
IKEv2 https://surfshark.com/blog/ikev2-vpn
http3/quic check https://http3check.net/
全国dns服务器IP地址大全 https://moneyslow.com/dns-ip.html
全球ping监控 https://ping.pe/
网卡流量统计 Linux network statistics https://humdi.net/vnstat/
Global DNS check https://www.whatsmydns.net/
隧道工具 https://github.com/anderspitman/awesome-tunneling
隧道GRE：https://community.hetzner.com/tutorials/linux-setup-gre-tunnel