NameVirtualHost *:80
NameVirtualHost *:443

<VirtualHost *:80>
    ServerAdmin mail@domaina.com
    DocumentRoot /home/www/html/domaina.com
    ServerName www.domaina.com
    ServerAlias *.domaina.com
    ScriptAlias /cgi-bin/ "/home/www/html/domaina.com/cgi-bin/"
    RewriteEngine On
    RewriteOptions Inherit
    ErrorLog /home/log/domaina.com-error_log
    CustomLog /home/log/domaina.com-access_log common
</VirtualHost>
<VirtualHost *:443>
    SSLEngine on
    SSLCertificateFile /etc/pki/tls/certs/ca.crt
    SSLCertificateKeyFile /etc/pki/tls/private/ca.key
    ServerAdmin mail@domaina.com
    DocumentRoot /home/www/html/domaina.com
    ServerName www.domaina.com
    ServerAlias *.domaina.com
    ScriptAlias /cgi-bin/ "/home/www/html/domaina.com/cgi-bin/"
    RewriteEngine On
    RewriteOptions Inherit
    ErrorLog /home/log/domaina.com-error_log
    CustomLog /home/log/domaina.com-access_log common
</VirtualHost>
<VirtualHost *:80>
    ServerAdmin mail@domainb.com
    DocumentRoot /home/www/html/domainb.com
    ServerName www.domainb.com
    ServerAlias *.domainb.com
    ScriptAlias /cgi-bin/ "/home/www/html/domainb.com/cgi-bin/"
    RewriteEngine On
    RewriteOptions Inherit
    ErrorLog /home/log/domainb.com-error_log
    CustomLog /home/log/domainb.com-access_log common
</VirtualHost>
<VirtualHost *:443>
    SSLEngine on
    SSLCertificateFile /etc/pki/tls/certs/ca.crt
    SSLCertificateKeyFile /etc/pki/tls/private/ca.key
    ServerAdmin mail@domainb.com
    DocumentRoot /home/www/html/domainb.com
    ServerName www.domainb.com
    ServerAlias *.domainb.com
    ScriptAlias /cgi-bin/ "/home/www/html/domainb.com/cgi-bin/"
    RewriteEngine On
    RewriteOptions Inherit
    ErrorLog /home/log/domainb.com-error_log
    CustomLog /home/log/domainb.com-access_log common
</VirtualHost>
<VirtualHost *:80>
    ServerAdmin mail@domainc.com
    DocumentRoot /home/www/html/domainc.com
    ServerName www.domainc.com
    ServerAlias *.domainc.com
    ScriptAlias /cgi-bin/ "/home/www/html/domainc.com/cgi-bin/"
    RewriteEngine On
    RewriteOptions Inherit
    ErrorLog /home/log/domainc.com-error_log
    CustomLog /home/log/domainc.com-access_log common
</VirtualHost>
<VirtualHost *:443>
    SSLEngine on
    SSLCertificateFile /etc/pki/tls/certs/ca.crt
    SSLCertificateKeyFile /etc/pki/tls/private/ca.key
    ServerAdmin mail@domainc.com
    DocumentRoot /home/www/html/domainc.com
    ServerName www.domainc.com
    ServerAlias *.domainc.com
    ScriptAlias /cgi-bin/ "/home/www/html/domainc.com/cgi-bin/"
    RewriteEngine On
    RewriteOptions Inherit
    ErrorLog /home/log/domainc.com-error_log
    CustomLog /home/log/domainc.com-access_log common
</VirtualHost>

<IfModule mod_proxy.c>
        #turning ProxyRequests on and allowing proxying from all may allow
        #spammers to use your proxy to send email.

        ProxyRequests Off

        <Proxy *>
                AddDefaultCharset off
                Order deny,allow
                Allow from all
        </Proxy>

        # Enable/disable the handling of HTTP/1.1 "Via:" headers.
        # ("Full" adds the server version; "Block" removes all outgoing Via: headers)
        # Set to one of: Off | On | Full | Block

        ProxyVia On
</IfModule>

NameVirtualHost *:80

<VirtualHost *:80>
    ServerAdmin mail@domainc.com
    ServerName www.domainc.com
    ErrorLog logs/domainc.com-error_log
    CustomLog logs/domainc.com-access_log common

    ProxyRequests Off
    ProxyPreserveHost On
    ProxyPass / http://[IP of server 1]:80/
    ProxyPassReverse / http://[IP of server 1]:80/
</VirtualHost>

ProxyPreserveHost On

ssh host2 sed -i~ '
  /Proxy/s/[IP of server 1]/[hostname of server 1]/
' /etc/httpd/conf/httpd.conf