• http://archive.kernel.org/centos-vault/
• https://vault.centos.org

/etc/yum.repos.d/CentOS-Vault.repo

[C5.11-base]
name=CentOS-5.11 - Base
#baseurl=http://vault.centos.org/5.11/os/$basearch/
baseurl=http://archive.kernel.org/centos-vault/5.11/os/x86_64/
gpgcheck=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
enabled=1
 
[C5.11-updates]
name=CentOS-5.11 - Updates
#baseurl=http://vault.centos.org/5.11/updates/$basearch/
baseurl=http://archive.kernel.org/centos-vault/5.11/updates/x86_64/
gpgcheck=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
enabled=1
 
[C5.11-extras]
name=CentOS-5.11 - Extras
#baseurl=http://vault.centos.org/5.11/extras/$basearch/
baseurl=http://archive.kernel.org/centos-vault/5.11/extras/x86_64/
#gpgcheck=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
enabled=1
 
[C5.11-centosplus]
name=CentOS-5.11 - Plus
baseurl=http://vault.centos.org/5.11/centosplus/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
enabled=0

Voir les sources :

• https://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/
  

Curieux pour SNMP la version est plus récente ici net-snmp-5.3.2.2-25.el5_11.x86_64.rpm :
https://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/x86_64/Debuginfo/

Ici les dernières versions non officiels RedHat net-snmp-5.3.2.2-25.el5_11.x86_64.rpm :

• https://linuxsoft.cern.ch/cern/slc5X/x86_64/yum/updates/
• https://rpms.remirepo.net/rpmphp/

/etc/yum.repos.d/CentOS-Base.repo

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
 
[base]
name=CentOS-7 - Base
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=$infra
baseurl=http://mirror.centos.org/centos/7/os/x86_64/
gpgcheck=0
enabled=1
 
#released updates
[updates]
name=CentOS-7 - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=updates&infra=$infra
baseurl=http://mirror.centos.org/centos/7/updates/x86_64/
gpgcheck=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
 
#additional packages that may be useful
[extras]
name=CentOS-7 - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=extras&infra=$infra
baseurl=http://mirror.centos.org/centos/7/extras/x86_64/
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
 
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-7 - Plus
#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=centosplus&infra=$infra
baseurl=http://mirror.centos.org/centos/7/centosplus/x86_64/
gpgcheck=0
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

/etc/yum.repos.d/cdrom.repo

[cdrom1]
name=DVD for Red Hat Enterprise Linux 7.2 Server
enabled=1
# mediaid=1446216863.790260
# metadata_expire=-1
gpgcheck=1
cost=500
baseurl=file:///mnt/cdrom
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
 
[cdrom-ha]
name=DVD for Red Hat Enterprise Linux 7.2 Server - HA
enabled=1
# mediaid=1446216863.790260
# metadata_expire=-1
gpgcheck=1
cost=500
baseurl=file:///mnt/cdrom/addons/HighAvailability/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

/etc/yum.repos.d/epel.repo

[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch
#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7