Centos6.7 で yum をすると[Errno 14] problem making ssl connectionとなる

表題の通りでCentos6.7 Final で yum をすると[Errno 14] problem making ssl connectionとなります
この解決方法は割と情報があっていつも以下の通りで直るのですが今回は直りませんでした
なにかリポジトリ等が変わったりしたのでしょうかご存じの方お教え下さいませ

https://ex1.m-yabe.com/archives/5979

#sedコマンドでファイルをvaultに書き換え。
#mirrorlist= の行をコメントにし、baseurl= のホスト名を「vault.centos.org」に変更しコメントを外す。

# sed -i -e "s/^mirrorlist=http:\/\/mirrorlist.centos.org/#mirrorlist=http:\/\/mirrorlist.centos.org/g" /etc/yum.repos.d/CentOS-Base.repo
# sed -i -e "s/^#baseurl=http:\/\/mirror.centos.org/baseurl=http:\/\/vault.centos.org/g" /etc/yum.repos.d/CentOS-Base.repo

# RPMパッケージをダウンロードするので、任意のディレクトリに移動
$ cd /usr/local/src/

# wgetでRPMのパッケージをダウンロード
$ wget ftp://ftp.pbone.net/mirror/vault.centos.org/6.10/updates/x86_64/Packages/ca-certificates-2020.2.41-65.1.el6_10.noarch.rpm
$ wget http://ftp.iij.ad.jp/pub/linux/centos-vault/6.7/os/x86_64/Packages/p11-kit-0.18.5-2.el6_5.2.x86_64.rpm
$ wget http://ftp.iij.ad.jp/pub/linux/centos-vault/6.7/os/x86_64/Packages/p11-kit-trust-0.18.5-2.el6_5.2.x86_64.rpm

# rpmコマンドでインストール
$ sudo rpm -Uhv  p11-kit-0.18.5-2.el6_5.2.x86_64.rpm p11-kit-trust-0.18.5-2.el6_5.2.x86_64.rpm
$ sudo rpm -Uhv  ca-certificates-2020.2.41-65.1.el6_10.noarch.rpm

#yum clean all

# やってみる
#sudo yum install -y nss
Loaded plugins: fastestmirror, security
Setting up Install Process
Loading mirror speeds from cached hostfile
http://vault.centos.org/centos/6/os/x86_64/repodata/repomd.xml: [Errno 14] problem making ssl connection
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

この手法で大体直るのですがなにがいけないのでしょうか
vi /etc/yum.repos.d/CentOS-Base.repo
は以下の通りです

# 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-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
baseurl=http://vault.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
slverify=0

#released updates
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
baseurl=http://vault.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
sslverify=0

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
baseurl=http://vault.centos.org/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
sslverify=0

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra
baseurl=http://vault.centos.org/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
sslverify=0

#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib&infra=$infra
baseurl=http://vault.centos.org/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
sslverify=0

どなたかピンとくる方お教えいただけますと嬉しいです