Hi, With the xrootd servers, I am seeing this error: (base) [bockjoo@cms ~]$ time xrdfs cmsio2.rc.ufl.edu ls /store/mc [FATAL] TLS error: Unable to validate 172.16.199.254; hostname not in SAN extension. The machine's FQHN is set at cmsio2.ufhpc ( 172.16.199.254 ) by the local cluster management team but cmsio2.rc.ufl.edu is the publicly accessible FQHN. So, I guess xrdfs is looking for the DN matching to the cmsio2.ufhpc instead of cmsio2.rc.ufl.edu. Is this expected? When we were using the non-xrootd security system, I did not see this issue. Is there any workaround in terms of xrootd directive or something? Thanks, Bockjoo ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1