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