[SOLVED] Apache2 mod_proxy mod_rewrite

[aleix]

Hi everybody,

I've been 4 days trying to do something I thought would be easy, but I'm having a lot of problems.

So, what I want to do is FORWARDING web petitions from 1 webserver to another.

Well, this is the scenary:

1 router, and 3 Servers (S1, S2, and S3), and a domain Example Web Page
S1 - 10.0.0.5, S2 - 10.0.0.6, S3 - 10.0.0.7
S1 is the Server where Router sends all peticions throught the port 8080
S3 is the Server where Router sends all peticions throught the port 80

The objective is that when I write Example Web Page, S1 sends me to S2.

So, I followed these steps:

• Enable needed modules:
  

  a2enmod rewrite
  a2enmod proxy
  a2enmod proxy_http
  
  apache restart

• Edit /etc/apache2/mods-enabled/proxy.conf
  

  <IfModule mod_proxy.c>
          ProxyRequests Off
          <Proxy *>
                 AddDefaultCharset off
                  Order deny,allow
                  Allow from all
          </Proxy>
          ProxyVia On
  </IfModule>

• Create /etc/apache2/sites-available/example
  

  NameVirtualHost *:8080
  <VirtualHost *:8080>
          <Proxy *>
                  Order deny,allow
                  Allow from all
          </Proxy>
          ServerName              www.example.com
          RewriteEngine on
          ProxyPass               / http://10.0.0.6
          ProxyPassReverse        / http://10.0.0.6
  </VirtualHost>

• Enable the new site
  

  a2ensite example

Finally I restarted apache and added 10.0.0.6 Example Web Page to my /etc/hosts file.

Well, when I tried it, I see the login page of my web application in 10.0.0.6, but when I login, I get this error:

Proxy Error

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request POST /login.

Reason: DNS lookup failure for: 10.0.0.6login

Apache/2.2.3 (Debian) Server at egestio.ditecsa.com Port 8080

Anybody knows whats the problem?

Thanks a lot friends.

[jledhead]

ok, now I am confused

without proxying, I am assuming the web servers can be accessed in the following way:

S1 - 10.0.0.5 - can be accessed thru http://10.0.0.5/
S2 - 10.0.0.6 - can be accessed thru http://10.0.0.6:8080/
S3 - 10.0.0.7 - can be accessed thru http://10.0.0.7/

is that correct or do I have it wrong?

[aleix]

Hi jledhead,

yes, it is correct.

To be more clear, the final objective is to have the S1 (10.0.0.5) as a frontal proxy to ditribute the peticions by port 80 to S2 or S3 depending on the domain used by the client.

So, I have just 1 public IP address. And I have 1 domain and 1 subdomain pointing to this IP address. This is what I want to dintinct.

Aleix

[aleix]

Hi jledhead,

finally someone helpel me to find the error.

It was really simple, but when you have been so much days fighting with thaht, you can't see the obvious things...

So, if you read the error with attention:

Proxy Error

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request POST /login.

Reason: DNS lookup failure for: 10.0.0.6login

We will find the problem:

ProxyPass               / http://10.0.0.6
ProxyPassReverse        / http://10.0.0.6

The key is that I need another slash at the final, so, it should be:

ProxyPass               / http://10.0.0.6/
ProxyPassReverse        / http://10.0.0.6/

Thank you very much!

Aleix