curl https://github.com/letsencrypt/letsencrypt/ -v
* About to connect() to github.com port 443 (#0)
* Trying 192.30.253.113... connected
* Connected to github.com (192.30.253.113) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
* CAfile: /etc/pki/tls/certs/ca-bundle.crt
CApath: none
* NSS error -12190
* Error in TLS handshake, trying SSLv3...
> GET /letsencrypt/letsencrypt/ HTTP/1.1
> User-Agent: curl/7.21.3 (i386-redhat-linux-gnu) libcurl/7.21.3 NSS/3.13.1.0 zlib/1.2.5 libidn/1.19 libssh2/1.2.7
> Host: github.com
> Accept: */*
>
* Connection died, retrying a fresh connect
* Closing connection #0
* Issue another request to this URL: 'https://github.com/letsencrypt/letsencrypt/'
* About to connect() to github.com port 443 (#0)
* Trying 192.30.253.113... connected
* Connected to github.com (192.30.253.113) port 443 (#0)
* TLS disabled due to previous handshake failure
* CAfile: /etc/pki/tls/certs/ca-bundle.crt
CApath: none
* NSS error -12286
* Closing connection #0
* SSL connect error
curl: (35) SSL connect error