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sslscan? Command line util for Gathering TLS (previously SSL) information from specific host using openssl. Protocol and ciphers, vulnerability and so on. Installation brew install sslscan starttls SMTP Test $ sslscan --starttls-smtp mx1.hanmail.net:25 Version: 1.11.11-static OpenSSL 1.0.2f 28 Jan 2016 Connected to 211.231.108.46 Testing SSL server mx1.hanmail.net on port 25 using SNI name mx1.h..

new IO::Socket::INET... 그냥은 timeout 이 잘 동작 하지 않음 alarm 을 이용해야 한다. 자세한건 차차 정리 참고 alarm IO::Socket::Timeout: socket timeout made easy How to timeout and proceed in perl? IO::Socket::INET