How to set proxy to download packages from pear.php.net.

pear config-show

Configuration (channel pear.php.net):
=====================================
Auto-discover new Channels     auto_discover    <not set>
Default Channel                default_channel  pear.php.net
HTTP Proxy Server Address      http_proxy       <not set>
PEAR server [DEPRECATED]       master_server    pear.php.net
Default Channel Mirror         preferred_mirror pear.php.net
Remote Configuration File      remote_config    <not set>
PEAR executables directory     bin_dir          /usr/bin
PEAR documentation directory   doc_dir          /usr/share/pear/doc
PHP extension directory        ext_dir          /usr/lib64/php/modules
PEAR directory                 php_dir          /usr/share/pear
PEAR Installer cache directory cache_dir        /var/cache/php-pear
PEAR configuration file        cfg_dir          /etc/pear
directory
PEAR data directory            data_dir         /usr/share/pear/data
PEAR Installer download        download_dir     /tmp/pear/download
directory
PHP CLI/CGI binary             php_bin          /usr/bin/php
php.ini location               php_ini          <not set>
--program-prefix passed to     php_prefix       <not set>
PHP's ./configure
--program-suffix passed to     php_suffix       <not set>
PHP's ./configure
PEAR Installer temp directory  temp_dir         /var/tmp
PEAR test directory            test_dir         /usr/share/pear/test
PEAR www files directory       www_dir          /var/www/html
Cache TimeToLive               cache_ttl        3600
Preferred Package State        preferred_state  stable
Unix file mask                 umask            22
Debug Log Level                verbose          1
PEAR password (for             password         <not set>
maintainers)
Signature Handling Program     sig_bin          /usr/bin/gpg
Signature Key Directory        sig_keydir       /etc/pearkeys
Signature Key Id               sig_keyid        <not set>
Package Signature Type         sig_type         gpg
PEAR username (for             username         <not set>
maintainers)
User Configuration File        Filename         /root/.pearrc
System Configuration File      Filename         /etc/pear.conf

pear config-set http_proxy "http://username:password@ipaddress:port"

pear config-set http_proxy ""