How to get ISPsystem repositories to work through a proxy

You can set up a proxy to resolve the issue when ISPsystem repositories are not accessible. Complete the following steps to add the proxy for repositories on CentOS 7:

Go to the directory with a list of the connected repositories:
```
cd /etc/yum.repos.d
```

For every repository you will see the .repo file with the following contents:

###[ispsystem-__VERSION__]
###name=ispsystem-__VERSION__
####baseurl=https://download.ispsystem.com/repo/centos/__VERSION__/$releasever/$basearch
###mirrorlist=https://download.ispsystem.com/repo/centos/__VERSION__/mirrorlist.txt
[ispsystem-5.173]
name=ispsystem-5.173
failovermethod=priority
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-ISPsystem
enabled=1
#baseurl=https://download.ispsystem.com/repo/centos/5.173/$releasever/$basearch
mirrorlist=https://download.ispsystem.com/repo/centos/5.173/mirrorlist.txt
gpgcheck=1

Please note that the file may contain several sections, e.g.:

[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch
mirrorlist=https://download.ispsystem.com/repo/centos/epel/mirrorlist.txt
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

[epel-debuginfo]
name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
#baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch/debug
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1

[epel-source]
name=Extra Packages for Enterprise Linux 7 - $basearch - Source
#baseurl=http://download.fedoraproject.org/pub/epel/7/SRPMS
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-source-7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1

Add a proxy if the .repo file contains the mirrorlist parameter which value starts with the domain "https://download.ispsystem.com". Usually, these are the repositories ispsystem.repo, ispsystem-base.repo and epel.repo. Add a proxy for the repository using this parameter:
```
proxy=<proxy address>
```
View details
```
<proxy address> — in the format http://IP address:port/
```

Add the authentication parameters:

proxy_username=<login>
proxy_password=<password>

View details

If the file contains only one section, add the parameter to the end of the file. E.g. the files ispsystem.repo and ispsystem-base.repo contain only one section. If there are several sections, add parameters into a required section. The section can be defined with the enabled parameter, the parameter value – "1".