Hello, Did you install all the certificate chain as of https://letsencrypt.org/certificates/ ? Could you please enable more verbosity and post the full error? To do that you should add '-d:2' to the configuration line starting with 'sec.protocol gsi'. G Ganis -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/716#issuecomment-391984971 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1