인증서 확인

openssl x509 -in cert.pem -noout -text
openssl x509 -in cert.pem -noout -enddate  

서버에 접속해서 인증서 만료날짜 확인

openssl s_client -connect www.daum.net:443 -state -nbio 2> /dev/null | openssl x509 -noout -dates

P12 변환

openssl pkcs12 -export -in fullchain.pem  -inkey privkey.pem  -out cert.p12 -name tomcat  -CAfile chain.pem -caname root

HAPorxy 인증서 만들기

cat fullchain.pem privkey.pem > ssl.pem