> For the complete documentation index, see [llms.txt](https://notes.joeir.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://notes.joeir.net/system-administration/infra-security-check-tools.md).

# Infra security check tools

## DKIM/DMARC check

1. <https://easydmarc.com/tools/dkim-lookup>
2. <https://dmarcly.com/tools/dkim-record-checker>
3. <https://mxtoolbox.com/dkim.aspx>

## SSL ciphers check

Use <https://cryptcheck.fr/>

## SSL certificate registrations

Use <https://crt.sh>

## Security Headers

Use <https://securityheaders.com/>

## TLS versions check

Use <https://www.ssllabs.com/ssltest/>