API 때문에 openssl 버전 관련 문제 발생해서 알아보게되었던 것들.
CURL_SSLVERSION
CURL_SSLVERSION_DEFAULT (0)
CURL_SSLVERSION_TLSv1 (1)
CURL_SSLVERSION_SSLv2 (2)
CURL_SSLVERSION_SSLv3 (3)
CURL_SSLVERSION_TLSv1_0 (4)
CURL_SSLVERSION_TLSv1_1 (5)
CURL_SSLVERSION_TLSv1_2 (6).
SSL 테스트 방법
ssltest.sh 127.0.0.1 443
http://www.tuxad.de/blog/archives/2014/11/19/openssl_updatesenhancements_for_rhel__centos_5/index.html
CURL_SSLVERSION & SSL 테스트