Thanks.  I found the issue using curl on the node itself.  Browsing to the URL worked but curl shows the Fortigate web filter error message.

On Thu, Apr 16, 2020 at 12:02 PM Strahil Nikolov <hunter86_bg@yahoo.com> wrote:
On April 16, 2020 1:02:01 PM GMT+03:00, Shareef Jalloq <shareef@jalloq.co.uk> wrote:
>I seem to be taking 2 steps back and 1 forward at the moment.  What
>could I
>have done on a node to start getting 403 forbidden errors when using
>yum?
>
>[root@ovirt-node-00 ~]# yum repolist
>
>Loaded plugins: enabled_repos_upload, fastestmirror, imgbased-persist,
>package_upload, product-id, search-disabled-repos, vdsmupgrade,
>versionlock
>
>Loading mirror speeds from cached hostfile
>
>ovirt-4.3-epel/x86_64/metalink
>
>                              |  13 kB  00:00:00
>
> * ovirt-4.3-epel: mirror.de.leaseweb.net
>
>http://mirror.centos.org/centos/7/sclo/x86_64/rh/repodata/repomd.xml:
>[Errno 14] HTTP Error 403 - Forbidden
>
>Trying other mirror.
>
>To address this issue please refer to the below wiki article
>
>
>https://wiki.centos.org/yum-errors
>
>
>If above article doesn't help to resolve this issue please use
>https://bugs.centos.org/.
>
>
>http://mirror.centos.org/centos/7/sclo/x86_64/rh/repodata/repomd.xml:
>[Errno 14] HTTP Error 403 - Forbidden
>
>Trying other mirror.
>
>ovirt-4.3/7
>
>                              | 3.0 kB  00:00:00
>
>http://mirror.centos.org/centos/7/storage/x86_64/gluster-6/repodata/repomd.xml:
>[Errno 14] HTTP Error 403 - Forbidden
>
>Trying other mirror.
>
>http://mirror.centos.org/centos/7/opstools/x86_64/repodata/repomd.xml:
>[Errno 14] HTTP Error 403 - Forbidden
>
>Trying other mirror.
>
>http://mirror.centos.org/centos/7/virt/x86_64/ovirt-4.3/repodata/repomd.xml:
>[Errno 14] HTTP Error 403 - Forbidden
>
>Trying other mirror.
>
>http://mirror.centos.org/centos/7/virt/x86_64/kvm-common/repodata/repomd.xml:
>[Errno 14] HTTP Error 403 - Forbidden
>
>Trying other mirror.
>
>http://fedorapeople.org/groups/virt/virtio-win/repo/latest/repodata/repomd.xml:
>[Errno 14] HTTP Error 403 - Forbidden
>
>Trying other mirror.
>
>sac-gluster-ansible/x86_64
>
>                              | 3.3 kB  00:00:00
>
>repo id
>    repo name
>                                                status
>
>centos-sclo-rh-release/x86_64
>    CentOS-7 - SCLo rh
>                                                    0
>
>ovirt-4.3/7
>    Latest oVirt 4.3 Release
>                                                2,831
>
>ovirt-4.3-centos-gluster6/x86_64
>    CentOS-7 - Gluster 6
>                                                    0
>
>ovirt-4.3-centos-opstools/x86_64
>    CentOS-7 - OpsTools - release
>                                                    0
>
>ovirt-4.3-centos-ovirt43/x86_64
>    CentOS-7 - oVirt 4.3
>                                                    0
>
>ovirt-4.3-centos-qemu-ev/x86_64
>    CentOS-7 - QEMU EV
>                                                    0
>
>ovirt-4.3-epel/x86_64
>    Extra Packages for Enterprise Linux 7 - x86_64
>                                                13,244
>
>ovirt-4.3-virtio-win-latest
>virtio-win builds roughly matching what will be shipped in upcoming
>RHEL
>                                                  0
>
>sac-gluster-ansible/x86_64
>    Copr repo for gluster-ansible owned by sac
>                                                    18
>
>repolist: 16,093
>
>Uploading Enabled Repositories Report
>
>Cannot upload enabled repos report, is this client registered?

I would first  check:
1. If proxy is defined correctly in yum.conf , $http_proxy  , $https_proxy , $ftp_proxy &  $noproxy
2. Check the default gateway & routing
3. Verify the urls can be accessed (for example - using a browser)

Best Regards,
Strahil Nikolov