当在CentOS5上无法使用yum时，出现了”M2Crypto.SSL.SSLError”的错误。

我之前使用老旧的CentOS5在vagrant bento上，现在无法使用yum了。

M2Crypto.SSL.SSLError: tlsv1 alert protocol version

在这种情况下，我只需要一个选项，请将/etc/yum.repos.d/Bento-Vault.repo中的base_url更改如下，这样对于我来说，yum就能正常运行了。

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