yum 代理不工作:无法检索镜像列表 14:HTTP 错误 403 - 禁止

yum 代理不工作:无法检索镜像列表 14:HTTP 错误 403 - 禁止

我有一个代理后面的 CentOS7:

$ grep proxy /etc/yum.conf
proxy=http://10.10.30.90:80/

并且允许到该代理的 http 流:

$ : < /dev/tcp/10.10.30.90/http
$ echo $?
0

我试图在该代理后面使用 yum,但检索镜像列表失败:

# yum check-update
Loaded plugins: fastestmirror
Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
14: HTTP Error 403 - Forbidden


 One of the configured repositories failed (Unknown),
 and yum doesnt 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).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=<repoid> ...

     4. Disable the repository permanently, so yum wont use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>
        or
            subscription-manager repos --disable=<repoid>

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64

我怎样才能使它工作?

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