Configuring Laravel for Reverse Proxy - php

Question

I have to upload a website that uses Laravel.
The server I must use are using a reverse proxy and when I put the files i developped on my computer, I'm getting a DNS error.
I do not have access to the server configuration, I can only upload/download files on the website's server partition.
I searched to find a solution but anything I can find was sort of related to this question.

Answer 1

So, this is not Laravel version, but this can help you, I hope !
Here is some code I wrote in cakePHP 2.X because I have some issues with a reverse proxy too
Cache class is the one from cakePHP, it's very simple (60 sec expiration, automatically serialized data).
LogError function is a simple log function
The code is the following
// Constants
define('REVERSE_PROXY_ADDR' , 'r-proxy.internal-domain.com');
define('REVERSE_PROXY_CACHE', 'r-proxy');
// Cache Config
Cache::config(REVERSE_PROXY_CACHE, array(
'engine' => 'File',
'prefix' => REVERSE_PROXY_CACHE . '_',
'path' => CACHE . REVERSE_PROXY_CACHE . '/',
'serialize' => true,
'duration' => 60,
));
function clientIp()
{
// Originaly from CakePHP 2.X
// ------------------------------
if ( isset($_SERVER['HTTP_CLIENT_IP']) )
{
$ipaddr = $_SERVER['HTTP_CLIENT_IP'];
}
else
{
$ipaddr = $_SERVER['REMOTE_ADDR'];
}
if ( isset($_SERVER['HTTP_CLIENTADDRESS']) )
{
$tmpipaddr = $_SERVER['HTTP_CLIENTADDRESS'];
if ( !empty( $tmpipaddr ) )
{
$ipaddr = preg_replace('/(?:,.*)/', '', $tmpipaddr);
}
}
$ip = trim($ipaddr);
// ------------------------------
// Reverse proxy stuff
if ( defined('REVERSE_PROXY_ADDR') && defined('REVERSE_PROXY_CACHE') )
{
$xfor = preg_replace('/(?:,.*)/', '', $_SERVER['HTTP_X_FORWARDED_FOR']);
$list = Cache::read('iplist', REVERSE_PROXY_CACHE);
if ( $list === false )
{
$list = gethostbynamel(REVERSE_PROXY_ADDR);
Cache::write('iplist', $list, REVERSE_PROXY_CACHE);
}
// empty or unreadable
if ( empty( $list ) )
{
logError('Unable to gather reverse proxy ip list, or empty list');
logError('Type : ' . gettype($list));
logError('IP : ' . $ip . ' - X-FORWARDED-FOR : ' . $xfor);
return $ip;
}
// not array ?!?!
if ( !is_array($list) )
{
logError('Given list was not an array');
logError('Type : ' . gettype($list));
logError($list);
return $ip;
}
// if in array, give forwarded for header
if ( in_array($ip, $list, true) )
{
return $xfor;
}
}
return $ip;
}
Then you just have to call the clientIp(); function.
If you have a static IP Address for your reverse proxy, you can just set it manually in the code, but that's not a good practice. But you will not need to use cache, and it will simplify a lot the code.
If you use a dynamic reverse proxy, you will have to query it on its hostname like this (what I did in the posted code) :
gethostbynamel('reverse-proxy-addr') to get a list of possible rproxy IPs
OR
gethostbyname('reverse-proxy-addr') to get one IP for rproxy
In other case you just have to check that REMOTE_ADDR is in a list of IPs marked as Reverse-proxy IPs
Hope it helps !