centos 7 ntlm代理无法访问docker或epel repo

Question

我需要通过公司代理联系epel和docker repo，到目前为止，我已经完成了以下工作：

1. 下载并安装了cntlm，cntlm -c /etc/cntlm.conf
   cntlm.conf有以下信息 Username user1 Domain org.daqomx.co.uk Password myDomainPassword Proxy proxy1.org.daqomx.co.uk:8080 Listen 3128
2. /etc/yum.conf中 proxy=http://127.0.0.1:3128/ proxy_username=user1 proxy_password=myDomainPassword
3. env | grep -i http http_proxy=http://localhost:3128/ https_proxy=http://localhost:3128/

结果：

• yum update适用于Centos-Base.repo

 $ sudo yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 - base: ftp.lysator.liu.se
 - extras: ftp.lysator.liu.se
 - updates: centos.mirror.transip.nl
Resolving Dependencies
--> Running transaction check
---> Package bind-libs-lite.x86_64 32:9.9.4-51.el7_4.1 will be updated
---> Package bind-libs-lite.x86_64 32:9.9.4-51.el7_4.2 will be an update
---> Package bind-license.noarch 32:9.9.4-51.el7_4.1 will be updated
---> Package bind-license.noarch 32:9.9.4-51.el7_4.2 will be an update

但是，如果我添加epel.repo或docker.repo，yum就会失败，

 One of the configured repositories failed (Unknown),
...
Cannot retrieve metalink for repository: epel/x86_64. Please verify its path and try again

• curl适用于--proxy-ntlm选项

$ curl -k --proxy-ntlm -U user1:myDomainPassword https://yum.dockerproject.org/repo/main/centos/7/repodata/repomd.xml

`?xml version="1.0" encoding="UTF-8"?>
...

问题： 如何启用epel或docker repo？
docker repo有baseurl = https://yum.dockerproject.org/repo/main/centos/7/ epel repo有metalink = https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch= $ basearch
尝试将gpgcheck切换为0.没有快乐。
那些回购文件很好，因为我在家里尝试它们没有代理，他们工作。