hmm. does this reproduce with: curl https://ftp.gwdg.de/pub/opensuse/repositories/home:/ecsos/openSUSE_Leap_42.3/repodata/repomd.xml and if yes, can you attach strace -eopen curl https://ftp.gwdg.de/pub/opensuse/repositories/home:/ecsos/openSUSE_Leap_42.3/repodata/repomd.xml output? if not, can you attach the logfile from strace -e open -ologfile zypper ref