pixelfed/config/trustedproxy.php

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<?php
$proxyString = env('TRUST_PROXIES', '');
if ($proxyString == '*' || $proxyString == '**') {
$proxies = $proxyString;
} else {
$proxies = explode(',', $proxyString);
}
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return [
/*
* Set trusted proxy IP addresses.
*
* Both IPv4 and IPv6 addresses are
* supported, along with CIDR notation.
*
* The "*" character is syntactic sugar
* within TrustedProxy to trust any proxy
* that connects directly to your server,
* a requirement when you cannot know the address
* of your proxy (e.g. if using Rackspace balancers).
*
* The "**" character is syntactic sugar within
* TrustedProxy to trust not just any proxy that
* connects directly to your server, but also
* proxies that connect to those proxies, and all
* the way back until you reach the original source
* IP. It will mean that $request->getClientIp()
* always gets the originating client IP, no matter
* how many proxies that client's request has
* subsequently passed through.
*/
'proxies' => $proxies,
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];