@chwissing - Ok, scratch that - I figured out the problem running it via the debugger. The server at root://t2-cms-xrootd01.desy.de is using 128-bit DH parameters and is running v5.3.4. Since that's basically equivalent to exchanging the keys in plain text, OpenSSL 3 outright refuses it (I don't think you can even manually configure the settings that low). You'll need to upgrade to 5.5.0 or later for compatibility. -- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/2028#issuecomment-1582532386 You are receiving this because you are subscribed to this thread. Message ID: <[log in to unmask]> ######################################################################## 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