Hello, on http://mirror-status.centos.org/ I see that mirror http://mirrors.njupt.edu.cn/centos/ and can access it. On https://www.centos.org/download/mirrors/ the mirror is shown as well. Perhaps the mirrorcheck WAS unable to access your mirror was disallowing the “checker” to access it like this is the case with “mirrors.cug.edu.cn”. Once it is not reachable it is also not shown in the list. mit freundlichem Gruß Christian Freund ---- Von: CentOS-mirror [mailto:centos-mirror-bounces at centos.org] Im Auftrag von ??? Gesendet: Mittwoch, 10. Mai 2017 07:20 An: centos-mirror at centos.org Betreff: [CentOS-mirror] how to make my mirror shown in the mirror list I am the mirror's admin at Nanjing university of Posts and Telecommunications,i also announced this mirror -'mirrors.njupt.edu.cn' before, and it shows in the http://mirror-status.centos.org and it looks ok,i can get other machines to update using this mirror automatically in my school before ,but now it doesn't show in the mirror list ,when i use the yum fastest mirror plugin ,is there anyway to correct this problem or is there anyway to better match this mirror in my school .When I registered this mirror in fedora mirror list ,it shows me that you can set some ip blocks that my school uses.