I have execute this command as root entry the server :
# yum install -y http://mirror.nethserver.org/nethserver/nethserver-release-7.rpm
After that command I have made this command
# yum update / to check for updates of packages /
VPS installation has only one interface for network with location in Dusseldorf .
Output is as below after yum update :
Loaded plugins: changelog, fastestmirror, nethserver_events
Loading mirror speeds from cached hostfile
http://188.8.131.52/repodata/repomd.xml: [Errno 14] HTTP Error 403 - Forbidden
Trying other mirror.
To address this issue please refer to the below wiki article
If above article doesn't help to resolve this issue please use https://bugs.centos.org/.
One of the configured repositories failed (RHEL Apache),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).