Haproxy - Reverse Proxy to subdomain.exemple.com

luciano_frc

Of course, I'll leave the screens below.
First I create the backend

All other backend options left as default
I only change this

Saved and now I'm going to my frontend

How will I have other subdomains
I'm going to use shared front end, however my first frontend is sudomains_frontend_shared

I leave all the options as default and only change that of the screen

Now I'm going to create my first frontend for for subdomain1.example.com

I leave my settings like this, but when trying to access externally I get the error 503

I left my firewall rules like this, with everything open so I had no problem blocking it.

Content of the var/etc/haproxy/haproxy.cfg


# Automaticaly generated, dont edit manually.
# Generated on: 2017-03-02 21:50
global
	stats socket /tmp/haproxy.socket level admin
	gid			80
	nbproc			1
	chroot			/tmp/haproxy_chroot
	daemon
	server-state-file /tmp/haproxy_server_state

frontend sudomains_frontend_shared-merged
	bind			xxx.xxx.xxx.xxx:80 name xxx.xxx.xxx.xxx:80   
	mode			http
	log			global
	option			http-keep-alive
	option			forwardfor
	acl https ssl_fc
	http-request set-header		X-Forwarded-Proto http if !https
	http-request set-header		X-Forwarded-Proto https if https
	timeout client		30000
	acl			ACL_SUB_1	hdr(host) -i subdomain.exemple.com
	use_backend Subdomain_http_ipv4  if  ACL_SUB_1 
	default_backend Subdomain_http_ipv4

backend Subdomain_http_ipv4
	mode			http
	log			global
	timeout connect		30000
	timeout server		30000
	retries			3
	source ipv4@ usesrc clientip
	option			httpchk OPTIONS / 
	server			Subdomain 172.16.0.250:80 check inter 1000

But I really can not access subdomain1.example.com :(

Thank you all for your help. :)

genotix

You do notice that you have typed "exemple" i/o "example" in your browser, right?

It also looks like the ip you're referring to isn't serving anything at port 80 or the firewall can't reach it.
What happens if you replace your ip 172.16.0.250 with something like 172.217.17.68 (Which is a google server)

The config seems to be ok from my perspective.

Mind you that exemple.com is registered (well it has a webserver behind it) so should you want to test it internally make sure it's internally resolved to the Firewall.
Are the IP addresses you are using actually internal and does your firewall know how to reach them?
One of them actually seems to be external and not having an HTTP server running which will definately end up in the error you get if your firewall tries to reach it through HAProxy.

genotix

By the way; please don't open up your firewall like this.
It's best to open up port 80 only if your main purpose is Proxying for internal servers.
Doing this is almost as good as leaving out your firewall and just reverse proxying on Nginx.

luciano_frc

This is actually, I am using the exemple.com domain and subdomain.example.com just illustrate how I configured it, that domain is fake, actually my HAProxy settings are pointing to my real domain.
When I type my real domain, the error I have in the browser is this 503
Already the rules of my firewall, are exactly like the image above, ie all open ports

luciano_frc

@genotix:

By the way; please don't open up your firewall like this.
It's best to open up port 80 only if your main purpose is Proxying for internal servers.
Doing this is almost as good as leaving out your firewall and just reverse proxying on Nginx.

Exactly, that my pfsense is only for testing with HAProxy, but my intention when it goes into production is to fine tune all these firewall rules…

genotix

Ok the 503 normally means your HAProxy has pickedup the incoming request, attempted to contact the backend but failed to connect to it.

So in this case double check your backend because it seems to be off.

luciano_frc

Sorry for my dumb question.
But how do I check if the backend is active or not?
My backend is exactly like the images above

genotix

Well according to your configuration you should have a backend running on
http://172.16.0.250:80

Now this will -at least- need to give a response when going to it with a web-browser.
Usually the backend will have a multi-domain structure so it will return a different page, depending on the hostname you are redirecting for.

Technically you can have several websites running on the same server on the same port.
This is e.g. how webshops often do it.

PiBa

Check stats page like explained here: https://github.com/PiBa-NL/pfsense-haproxy-package-doc/wiki/haproxy_troubleshooting
Make sure the servers are seen as 'up'.

Also disable the transparent-client-ip on the backend, or at least understand what it affects. It 'breaks' things some expect to 'just work'..

luciano_frc

Hello everyone.
Thanks for the posts posted, but I really can not make HAProxy work recursively.
I've been trying this for over 30 days and with no success.
If someone has the HAProxy configured, and can leave the prints of the settings I thank

doktornotor

At the risk of stating the obvious: exemple is NOT the same thing as example. You keep producing that typo over and over and over again. When you keep obfuscating your setup and producing collateral typos in the way, it's impossible for others to debug anyway.

You've already been told how to debug in the post directly above.