RCurl is giving me an error:1411809D:SSL routines:SSL_CHECK_SERVERHELLO_TLSEXT:tls invalid ecpointformat list when I try to connect via SSL to an https (not public,
error:1411809D:SSL routines:SSL_CHECK_SERVERHELLO_TLSEXT:tls invalid ecpointformat list
The issue is described here for python. Setting sslversion=3L in your RCurl call with ssl.verifypeer=TRUE should resolve the problem.
sslversion=3L
ssl.verifypeer=TRUE