Tag: Amazon EC2

  • Amazon EC2

    Videos

  • Enable Gzip in Amazon Linux

    To verify Apache module is loaded, run 

    [root@ip-172-31-29-220 ~]# apachectl -M | grep deflate
 deflate_module (shared)
[root@ip-172-31-29-220 ~]#

    Create file

    vi /etc/httpd/conf.d/gzip.conf

    Add following content

    
  # Restrict compression to these MIME types
  AddOutputFilterByType DEFLATE text/plain
  AddOutputFilterByType DEFLATE text/html
  AddOutputFilterByType DEFLATE application/xhtml+xml
  AddOutputFilterByType DEFLATE text/xml
  AddOutputFilterByType DEFLATE application/xml
  AddOutputFilterByType DEFLATE application/xml+rss
  AddOutputFilterByType DEFLATE application/x-javascript
  AddOutputFilterByType DEFLATE text/javascript
  AddOutputFilterByType DEFLATE text/css
  AddOutputFilterByType DEFLATE image/png
  AddOutputFilterByType DEFLATE image/gif
  AddOutputFilterByType DEFLATE image/jpeg

  # Level of compression (Highest 9 - Lowest 1)
  DeflateCompressionLevel 9

  # Netscape 4.x has some problems.
  BrowserMatch ^Mozilla/4 gzip-only-text/html

  # Netscape 4.06-4.08 have some more problems
  BrowserMatch ^Mozilla/4\.0[678] no-gzip

  # MSIE masquerades as Netscape, but it is fine
  BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html

  
    # Make sure proxies don't deliver the wrong content
    Header append Vary User-Agent env=!dont-vary

    Restart Apache with

    service httpd restart

    To verify gzip is working, run

    curl -I -H 'Accept-Encoding: gzip,deflate' http://YOUR-SITE-URL/ 2>/dev/null | grep gzip

    You will see something like

    NOTE: gzip compression only works if you have a reasonably large file. If your file is very small, then gzip won’t do anything.

    See gzip

  • Cpanel Server Behind NAT – Amazon EC2

    When your cpanel server is behind nat, for example Amazon EC2 where you have an internal IP and External IP.

    Go to

    Home > Server Configuration> Basic WebHost Manager® Setup

    Enter your servers internal IP where it ask for “The IPv4 address (only one address) to use to set up shared IPv4 virtual hosts.”.

    Now login to Server using SSH and run

    /scripts/build_cpnat

    For an Amazon EC2 server with internal IP 172.31.26.120, i added the IP in WHM > Basic WebHost Manager® Setup

    Run command /scripts/build_cpnat

    That associate the IP with external IP address.

    [root@ip-172-31-26-120 ~]# /scripts/build_cpnat
info [build_cpnat] 172.31.26.120 => 13.210.58.114
[root@ip-172-31-26-120 ~]#

    This allow DNS and Apache to resolve external IP properly. With out running this command DNS server will just reply with servers internal IP address.