Thank you for your help. I have solved the problem. Like you said, I used the IPv6. I still don't want to add IPv6 to the whitelist. Because, in our organization, we just beginning to survey IPv6 network system. If the IPv6 network system is ready. I will add our IPv6 address to the whitelist as soon as I can. At last, I am very thank you for solving my question. Anssi Johansson <avij at centosproject.org> 於 2018年7月20日 週五 下午11:05寫道： > 韋佳均 kirjoitti 20.7.2018 klo 17.56: > > To whom it may concern > > > > I am a new system administrator fromlinux.cs.nctu.edu.tw > > <http://linux.cs.nctu.edu.tw/>(centos.cs.nctu.edu.tw > > <http://centos.cs.nctu.edu.tw/>) > > > > And I want to sync the centos package from msync.centos.org > > <http://msync.centos.org/> > > but I got the error message > > > > @ERROR: Unknown module 'CentOS' > > rsync error: error starting client-server protocol (code 5) at > > main.c(1657) [Receiver=3.1.3] > > > > > > I search from google, And I find the message > > > http://grokbase.com/t/centos/centos-mirror/149ka8ehsy/cant-rsync-from-msync-centos-org-centos > > > > So, I think I must to check our machine is in white list. > > My machine IP is "140.113.168.126" > > > > If IP is not current, may I update the information. > > Sync schedule: Every 6 hrs > > Bandwidth: 1Gbps > > Location: Asia Taiwan > > Sponsor: Computer Science Computer Center, National Chiao Tung University > > Sponsor URL: https://www.cs.nctu.edu.tw/cchonor/ > > IPv4 address to authorize: 140.113.168.126 > > IPv6 address to authorize: - > > Email contact: weicc at cs.nctu.edu.tw <mailto:weicc at cs.nctu.edu.tw> > > Mirroring AltArch : not yet > > We seem to have 140.113.168.126 enabled already. Perhaps your server has > an IPv6 address? Does rsync work better if you use the -4 option to > force the use of IPv4? > > If this is the case, I'd prefer to add your IPv6 address to the > whitelist as well so you would not need to sync over a legacy protocol. > > This would be a good way to determine your IPv6 address: > > $ rsync -6 rsync://no-access.miuku.net/keep-out > @ERROR: access denied to keep-out from yourhostname (2001:db0::123) > > (the error message shows your IPv6 address, if you have one) > _______________________________________________ > CentOS-mirror mailing list > CentOS-mirror at centos.org > https://lists.centos.org/mailman/listinfo/centos-mirror > -- Sincerely, Kevin Wei (weicc) 韋佳均 (Wei Chia-Chun) Computer Science Computer Center, National Chiao Tung University 1001 University Road, Hsinchu, Taiwan 300, ROC +886-3-5712121 #54707 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-mirror/attachments/20180721/e91dca50/attachment-0004.html>