2015-08-03 2:39 GMT+08:00 Stephen John Smoogen <[log in to unmask]>: > On 2 August 2015 at 09:32, d tbsky <[log in to unmask]> wrote: >> hi: >> we notice some ip address can not access scientific linux servers >> (web or ftp). I don't know why. for example default sl7.repo list >> content below: >> >> baseurl=http://ftp.scientificlinux.org/linux/scientific/$slreleasever/$basearch/os/ >> >> http://ftp1.scientificlinux.org/linux/scientific/$slreleasever/$basearch/os/ >> >> http://ftp2.scientificlinux.org/linux/scientific/$slreleasever/$basearch/os/ >> >> ftp://ftp.scientificlinux.org/linux/scientific/$slreleasever/$basearch/os/ >> >> >> but they resolve to only 1 ip address: 131.225.105.11 >> so some of our servers can not get yum update working with the default >> configuration. >> this happen about a year ago. and it seems more and more ip are banned.. > > You need to provide what ip address you are trying to reach the server > from for anyone to help on this. > > There could be two reasons for this: > > The Scientific Linux distribution is sponsored by a United States > Department of Energy National Lab, Fermi Laboratory. That does mean > that it has to abide by certain restrictions on what countries are > allowed to connect to the server (countries like North Korea and some > others). > > Various foreign governments block access to United States government > servers for various reasons at various times. This can cause problems > for other people if your access 'transits' that countries routers. > > Not much can be done about this other than trying to find a mirror > that is allowed access in the country and then pointing your > yum.repos.d/*.repo files to that mirror. > > -- > Stephen J Smoogen. thanks for the information. may I ask whom to contact so I can give him/her the ip addresses? but since these ip may be blocked again in the future, I don't know if the default sl7.repo can list more repository other than "131.225.105.11"? thanks again for kindly help!! Regards, tbskyd