Configure HA Proxy for Load Balancing with SSL Termination and SSL Pass-through

http://virtuallyhyper.com/2013/05/configure-haproxy-to-load-balance-sites-with-ssl/

frontend unsecured *:80 
mode http
redirect prefix https://foo.bar.com

#--------------------------------------------------------------------- #
 frontend secured
 #---------------------------------------------------------------------

 frontend secured *:443
 mode tcp
 default_backend app

 #--------------------------------------------------------------------- # 
round robin balancing between the various backends 
#--------------------------------------------------------------------- #

backend app 
mode tcp 
balance roundrobin
 server app1 127.0.0.1:5001 check
 server app2 127.0.0.1:5002 check
 server app3 127.0.0.1:5003 check
 server app4 127.0.0.1:5004 check

http://stackoverflow.com/questions/13227544/haproxy-redirecting-http-to-https-ssl