1. Pound Load Balancer Naranchuluun. D

2. What Pound is a reverse-proxy: it passes requests from client browsers to one or more back-end servers. a load balancer: it will distribute the requests from the client browsers among several back-end servers, while keeping session information. an SSL wrapper: Pound will decrypt HTTPS requests from client browsers and pass them as plain HTTP to the back-end servers. an HTTP/HTTPS sanitizer: Pound will verify requests for correctness and accept only well-formed ones. a fail over-server: should a back-end server fail, Pound will take note of the fact and stop passing requests to it until it recovers. a request redirector: requests may be distributed among servers according to the requested URL.

3. What Pound is Not Pound is not a Web server: by itself, Pound serves no content - it contacts the back-end server(s) for that purpose. Pound is not a Web accelerator: no caching is done - every request is passed "as is" to a back- end server.

4. Status Pound was successfully used in production with a variety of Web servers, including Apache, IIS, Zope, WebLogic, Jakarta/Tomcat, iPlanet, etc. In general Pound passes requests and responses back and forth unchanged, so we have no reason to think that any web server would be incompatible.

5. Client browsers that were tested IE 5.0/5.5 (Windows) HTTP/HTTPS Netscape 4.7 (Windows/Linux) HTTP/HTTPS Mozilla (Windows/Linux) HTTP/HTTPS Konqueror (Linux) HTTP/HTTPS Galleon (Linux) HTTP/HTTPS Opera (Linux/Windows) HTTP/HTTPS Lynx (Linux) HTTP

6. Installation Probably the easiest way to install Pound is to use a pre-compiled package if you can find one. While Apsis offers no such packages, they are available for quite a few systems (SuSE Linux, Debian and derivatives such as Ubuntu, as well as some private packages: RPMs for RedHat are available at http://www.invoca.ch/pub/packages/pound/ A nice FreeBSD live-CD distribution is available at http://www.targeted.org/files/fbsd71_pound244.iso.gz, including a Pound binary. Packages for CRUX Linux are available from http://ports.sterneck.asia/shin/#pound. Example on Ubuntu Server Edition : apt-get install pound

7. Configration

8. Http ListenHTTP Address 0.0.0.0 # all interfaces Port 80 HeadRemove "X-Forwarded-For" Service BackEnd Address 10.0.0.1 Port 80 Priority 1 End BackEnd Address 10.0.0.2 Port 80 Priority 1 End

9. Https ListenHTTPS Address 0.0.0.0 # all interfaces Port 443 AddHeader "X-Forwarded-Proto: https“ HeadRemove "X-Forwarded-Proto" HeadRemove "X-Forwarded-For" Cert "/path/to/certificate.pem Service BackEnd Address 10.0.0.1 Port 80 Priority 1 End BackEnd Address 10.0.0.2 Port 80 Priority 1 End

10. More Information http://www.apsis.ch/pound http://syslog.tv/2011/09/29/load-balancing- httphttps-with-pound-on-debian-6ubuntu/http://syslog.tv/2011/09/29/load-balancing- httphttps-with-pound-on-debian-6ubuntu/ http://blog.secaserver.com/2011/11/install- pound-web-load-balancer/http://blog.secaserver.com/2011/11/install- pound-web-load-balancer/

11. Question?