I own one domain like xyz.com and I'm trying to redirect subdomain other ip with haproxy.

I use tomcat on the servers and I use haproxy to redirect incoming requests on port 80 to port 8080.


www.xyz.com ->

www.xyz.com/abc ->
  or  abc.xyz.com ->

In order to do this redirection, how do I set haproxy?

  • 7
    I don't know why you got downvoted 3 times and without any comment. This is not a very good stackexchange etiquette! Sorry for this bad welcome.
    – Stefano
    Jan 23, 2012 at 10:42

2 Answers 2


In haproxy you do redirection combining acl rules and redirect ones; you choose the right server using the backend rule.

The official haproxy documentation is not very easy to read, but it's very complete.

Something like this (just a sketch to give you an idea):

frontend http-in
    mode              http
    bind              FRONTENDIP:80 # eg.

    default_backend   tomcat_server_2

    acl tomcat_1      hdr_end(host) -i www.xyz.com
    acl tomcat_2      hdr_end(host) -i abc.xyz.com
    acl tomcat_path   path_beg /abc/

    use_backend       tomcat_server_1 if tomcat_1 !tomcat_path

backend tomcat_server_1
    server tomcat1 maxconn 1000

backend tomcat_server_2
    server tomcat2 maxconn 1000

If you want to redirect www.xyz.com/abc/ to abc.xyz.com :

    redirect prefix   http://abc.xyz.com if tomcat_path
  • 1
    Thanks for the example! I think the second backend tomcat_server_1 should be backend tomcat_server_2
    – redgeoff
    Jul 26, 2017 at 22:33
  • doesn't work. It is putting it on the end instead of the prefix. Mar 3, 2021 at 19:47

Haproxy is neither meant to redirect names nor to redirect URIs.

Names are directed by name servers (DNS).

URIs are redirected by (modules of) a webserver (HTTP).

Haproxy is to balance traffic (TCP/IP) between two (or more) identical servers.

  • 9
    haproxy can very well redirect both prefixes (subdomain/domain/etc.) and urls. Search for redirect location and redirect prefix in haproxy.1wt.eu/download/1.4/doc/configuration.txt
    – Stefano
    Jan 23, 2012 at 10:41
  • 10
    You 're wrong, Haproxy is both a load balancer and a reverse proxy server.
    – jmoreira
    Jul 11, 2014 at 2:55

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