This repository contains various tools, which are intended to debug or analyze problems related to SSL/TLS.

• analyze-ssl.pl
  • check support for various SSL/TLS version
  • check which ciphers are support
  • verfiy certificate
  • check OCSP state
  • check if SNI is supported and/or required
  • display chain certificates and also local root if certification succeeded
  • support direct connection and various form of STARTTLS
  • ...

• mx_starttls_bulk.pl
  • bulk checking of domains for SMTP TLS support
  • fast parallel checking with non-blocking I/O: 40..60 domains/s which includes MX lookups and several TLS connections
  • checks for common problems with TLS support in MTA
  • does not try to verify certificates, because STARTTLS itself is open to MITM attacks by stripping STARTTLS support
• mx_starttls_bulk_summarize.pl
  • summarize data created by mx_starttls_bulk

• https_ocsp_bulk.pl
  • check lots of sites for certificate verification, ciphers and OCSP revocation problems
  • synchronous, i.e one site gets checked after the other

• check-ssl-heartbeat.pl
  • check for heartbleed OpenSSL vulnerability
  • supports various protocols requiring STARTTLS or similar