10. Using yum with a Proxy Server
By default, yum accesses network repositories
with HTTP. All yum HTTP operations use
HTTP/1.1, and are compatible with web proxy servers that support
this standard. You may also access FTP repositories, and configure
yum to use an FTP proxy server. The
squid package provides a proxy service for
both HTTP/1.1 and FTP connections.
![[Tip]](HEADER.images/tip.png) | Modifying yum for Network Compatibility |
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Refer to the man page for
yum.conf for information on HTTP settings
that may be modified for compatibility with nonstandard web
proxy servers. Alternatively, configure yum
to use an FTP proxy server, and access repositories that support
FTP. The Fedora repositories support both HTTP and FTP.
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10.1. Configuring Proxy Server Access
To enable all yum operations to use a proxy
server, specify the proxy server details in
/etc/yum.conf. The proxy
setting must specify the proxy server as a complete URL,
including the TCP port number. If your proxy server requires a
username and password, specify these by adding
proxy_username and
proxy_password settings.
The settings below enable yum to use the
proxy server
mycache.mydomain.com,
connecting to port 3128, with the username
yum-user and the
password qwerty.
# The proxy server - proxy server:port number
proxy=https://mycache.mydomain.com:3128
# The account details for yum connections
proxy_username=yum-user
proxy_password=qwerty
Example 3. Configuration File Settings for Using A Proxy Server
![[Note]](HEADER.images/note.png) | Global Settings |
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If you define a proxy server in
/etc/yum.conf, all
users connect to the proxy server with those details when
using yum.
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10.2. Configuring Proxy Server Access for a Single User
To enable proxy access for a specific user, add the lines in the
example box below to the user's shell profile. For the default
bash shell, the profile is the file
~/.bash_profile. The settings below enable
yum to use the proxy server
mycache.mydomain.com,
connecting to port 3128.
# The Web proxy server used by this account
http_proxy="https://mycache.mydomain.com:3128"
export http_proxy
Example 4. Profile Settings for Using a Proxy Server
If the proxy server requires a username and password, add these
to the URL. To include the username
yum-user and the
password qwerty, add these settings:
# The Web proxy server, with the username and password for this account
http_proxy="https://yum-user:[email protected]:3128"
export http_proxy
Example 5. Profile Settings for a Secured Proxy Server
| The http_proxy Environment Variable |
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The http_proxy environment variable is also
used by curl and other utilities. Although
yum itself may use
http_proxy in either upper-case or
lower-case, curl requires the name of the
variable to be in lower-case.
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