diff --git a/.env.example b/.env.example
index 89de920f8..e7b42d611 100644
--- a/.env.example
+++ b/.env.example
@@ -68,10 +68,20 @@ PREVENT_ACCESSING_MISSING_ATTRIBUTES=false
 PRINT_COST_ONESIDED=8
 PRINT_COST_TWOSIDED=12
 PRINTER_NAME=NemUjBela
+PRINTER_ADDITIONAL_ARGS=
+PRINTER_STAT_ADDITIONAL_ARGS=
 
 NETREG=1000
 KKT=2000
 
+TRUST_PROXIES=
+
+LPSTAT_COMMAND=lpstat
+CANCEL_COMMAND=cancel
+PDFINFO_COMMAND=pdfinfo
+PING_COMMAND=ping
+PDFLATEX_COMMAND=/usr/bin/pdflatex
+
 WORKSHOP_BALANCE_EXTERN=0.45
 WORKSHOP_BALANCE_RESIDENT=0.6
 
diff --git a/app/Console/Commands.php b/app/Console/Commands.php
index 6af3de083..89ca6500c 100644
--- a/app/Console/Commands.php
+++ b/app/Console/Commands.php
@@ -17,7 +17,7 @@ private static function isDebugMode()
 
     public static function getCompletedPrintingJobs()
     {
-        $command = "lpstat -W completed -o " . config('print.printer_name') . " | awk '{print $1}'";
+        $command = config('commands.lpstat') . " " . config('print.stat_additional_args') . " -W completed -o " . config('print.printer_name') . " | awk '{print $1}'";
         if (self::isDebugMode()) {
             $result = [0];
         } else {
@@ -42,7 +42,7 @@ public static function print($command)
 
     public static function cancelPrintJob(string $jobID)
     {
-        $command = "cancel " . $jobID;
+        $command = config('commands.cancel') . " " . $jobID;
         if (self::isDebugMode()) {
             // cancel(1) exits with status code 0 if it succeeds
             $result = ['output' => '', 'exit_code' => 0];
@@ -56,7 +56,7 @@ public static function cancelPrintJob(string $jobID)
 
     public static function getPages($path)
     {
-        $command = "pdfinfo " . $path . " | grep '^Pages' | awk '{print $2}' 2>&1";
+        $command = config('commands.pdfinfo') . " " . $path . " | grep '^Pages' | awk '{print $2}' 2>&1";
         if (self::isDebugMode()) {
             $result = rand(1, 10);
         } else {
@@ -72,7 +72,7 @@ public static function pingRouter($router)
             $result = rand(1, 10) > 9 ? "error" : '';
         } else {
             // This happens too often to log.
-            $command = "ping " . $router->ip . " -c 1 | grep 'error\|unreachable'";
+            $command = config('commands.ping') . " " . $router->ip . " -c 1 | grep 'error\|unreachable'";
             $result = exec($command);
         }
         return $result;
@@ -83,9 +83,10 @@ public static function latexToPdf($path, $outputDir)
         if (self::isDebugMode()) {
             $result = "ok";
         } else {
-            $command = "pdflatex " . "-interaction=nonstopmode -output-dir " . $outputDir . " " . $path . " 2>&1";
+            $command = config('commands.pdflatex') . " " . "-interaction=nonstopmode -output-dir " . $outputDir . " " . $path . " 2>&1";
             Log::info($command);
             $result = exec($command);
+            Log::info($result);
         }
         return $result;
     }
diff --git a/app/Http/Controllers/HomeController.php b/app/Http/Controllers/HomeController.php
index 204ccabf5..80c344403 100644
--- a/app/Http/Controllers/HomeController.php
+++ b/app/Http/Controllers/HomeController.php
@@ -131,9 +131,9 @@ public function reportBug(Request $request)
         $username = user()->name;
 
         //personal auth token from your github.com account - see CONTRIBUTING.md
-        $token = env('GITHUB_AUTH_TOKEN');
+        $token = config('github.auth_token');
 
-        $url = "https://api.github.com/repos/" . env('GITHUB_REPO') . "/issues";
+        $url = "https://api.github.com/repos/" . config('github.repo') . "/issues";
 
         //request details, removing slashes and sanitize content
         $title = htmlspecialchars(stripslashes('Reported bug'), ENT_QUOTES);
@@ -196,11 +196,11 @@ private function getHomePageContacts(): array
                 'phone_number' => $staff?->personalInformation?->phone_number
             ],
             'reception' => [
-                'phone_number' => env('PORTA_PHONE')
+                'phone_number' => config('contacts.porta_phone')
             ],
             'doctor' => [
-                'name' => env('DOCTOR_NAME'),
-                'link' => env('DOCTOR_LINK')
+                'name' => config('contacts.doctor_name'),
+                'link' => config('contacts.doctor_link')
             ]
         ];
 
diff --git a/app/Http/Controllers/Secretariat/SemesterEvaluationController.php b/app/Http/Controllers/Secretariat/SemesterEvaluationController.php
index 227a6f4cb..757989588 100644
--- a/app/Http/Controllers/Secretariat/SemesterEvaluationController.php
+++ b/app/Http/Controllers/Secretariat/SemesterEvaluationController.php
@@ -174,7 +174,7 @@ public function store(Request $request)
      */
     public static function sendEvaluationAvailableMail()
     {
-        Mail::to(env('MAIL_MEMBRA'))->queue(new \App\Mail\EvaluationFormAvailable());
+        Mail::to(config('contacts.mail_membra'))->queue(new \App\Mail\EvaluationFormAvailable());
     }
 
     /**
diff --git a/app/Http/Controllers/StudentsCouncil/EpistolaController.php b/app/Http/Controllers/StudentsCouncil/EpistolaController.php
index a35d4387e..4170dd813 100644
--- a/app/Http/Controllers/StudentsCouncil/EpistolaController.php
+++ b/app/Http/Controllers/StudentsCouncil/EpistolaController.php
@@ -137,7 +137,7 @@ public function send()
     {
         $this->authorize('send', EpistolaNews::class);
 
-        Mail::to(env('MAIL_KOMMBIZ'))->send(new EpistolaCollegii(self::getActiveNews()));
+        Mail::to(config('contacts.mail_kommbiz'))->send(new EpistolaCollegii(self::getActiveNews()));
 
         EpistolaNews::where('sent', false)->update(['sent' => true]);
 
diff --git a/app/Http/Middleware/TrustProxies.php b/app/Http/Middleware/TrustProxies.php
index 6707c6103..999e0ed8a 100644
--- a/app/Http/Middleware/TrustProxies.php
+++ b/app/Http/Middleware/TrustProxies.php
@@ -14,6 +14,14 @@ class TrustProxies extends Middleware
      */
     protected $proxies;
 
+    /**
+     * Initiates the object with a configured proxy
+     */
+    public function __construct()
+    {
+        $this->proxies = config('app.trust_proxies');
+    }
+
     /**
      * The headers that should be used to detect proxies.
      *
diff --git a/app/Jobs/PingRouter.php b/app/Jobs/PingRouter.php
index ce3a1b43f..78da50c2a 100644
--- a/app/Jobs/PingRouter.php
+++ b/app/Jobs/PingRouter.php
@@ -41,7 +41,7 @@ public function handle()
             $this->router->update([
                 'failed_for' => 0,
             ]);
-        } elseif (env('APP_DEBUG') == false) {
+        } elseif (config('app.debug') == false) {
             $this->router->increment('failed_for');
             $this->router->sendWarning();
         }
diff --git a/app/Utils/Printer.php b/app/Utils/Printer.php
index 575f40c75..cafaf7731 100644
--- a/app/Utils/Printer.php
+++ b/app/Utils/Printer.php
@@ -113,14 +113,14 @@ private function printFile()
         $printer_name = config('print.printer_name');
         $state = PrintJob::QUEUED;
         try {
-            $command = "lp -d " . $printer_name
+            $command = "lp " . config('print.additional_args')  . " -d " . $printer_name
                     . ($this->is_two_sided ? " -o sides=two-sided-long-edge " : " ")
                     . "-n " . $this->number_of_copies . " "
                     . $this->path . " 2>&1";
             $result = Commands::print($command);
             if (!preg_match("/^request id is ([^\s]*) \\([0-9]* file\\(s\\)\\)$/", $result, $job)) {
                 Log::error("Printing error at line: " . __FILE__ . ":" . __LINE__ . " (in function " . __FUNCTION__ . "). result:"
-                    . print_r($result, true));
+                    . print_r($result, true) . ". Command: " . $command);
                 $state = PrintJob::ERROR;
             }
             $job_id = $job[1];
diff --git a/config/app.php b/config/app.php
index 0c6aa8bd6..6b450f734 100644
--- a/config/app.php
+++ b/config/app.php
@@ -283,4 +283,10 @@
         'View' => Illuminate\Support\Facades\View::class,
 
     ],
+
+    /*
+    Trust proxies
+    */
+
+    'trust_proxies' => explode(',', env('TRUST_PROXIES', '')),
 ];
diff --git a/config/commands.php b/config/commands.php
new file mode 100644
index 000000000..c3ea4f12c
--- /dev/null
+++ b/config/commands.php
@@ -0,0 +1,9 @@
+<?php
+
+return [
+    'lpstat' => env('LPSTAT_COMMAND', 'lpstat'),
+    'cancel' => env('CANCEL_COMMAND', 'cancel'),
+    'pdfinfo' => env('PDFINFO_COMMAND', 'pdfinfo'),
+    'ping' => env('PING_COMMAND', 'ping'),
+    'pdflatex' => env('PDFLATEX_COMMAND', '/usr/bin/pdflatex'),
+];
diff --git a/config/contacts.php b/config/contacts.php
new file mode 100644
index 000000000..5c9060628
--- /dev/null
+++ b/config/contacts.php
@@ -0,0 +1,24 @@
+<?php
+
+return [
+	'mail_test_admin' => env('MAIL_TEST_ADMIN', ''),
+	'mail_active' => env('MAIL_ACTIVE', ''),
+	'mail_driver' => env('MAIL_DRIVER', ''),
+	'mail_host' => env('MAIL_HOST', ''),
+	'mail_port' => env('MAIL_PORT', ''),
+	'mail_username' => env('MAIL_USERNAME', ''),
+	'mail_password' => env('MAIL_PASSWORD', ''),
+	'mail_encryption' => env('MAIL_ENCRYPTION', ''),
+	'mail_from_address' => env('MAIL_FROM_ADDRESS', ''),
+	'mail_replyto_address' => env('MAIL_REPLYTO_ADDRESS', ''),
+	'developer_email' => env('DEVELOPER_EMAIL', ''),
+	'mail_valasztmany' => env('MAIL_VALASZTMANY', ''),
+	'mail_elnok' => env('MAIL_ELNOK', ''),
+	'mail_kommbiz' => env('MAIL_KOMMBIZ', ''),
+	'mail_membra' => env('MAIL_MEMBRA', ''),
+	'mail_sysadmin' => env('MAIL_SYSADMIN', ''),
+	'mail_secretary' => env('MAIL_SECRETARY', ''),
+	'porta_phone' => env('PORTA_PHONE', ''),
+	'doctor_name' => env('DOCTOR_NAME', ''),
+	'doctor_link' => env('DOCTOR_LINK', ''),
+];
diff --git a/config/github.php b/config/github.php
new file mode 100644
index 000000000..f5d092eae
--- /dev/null
+++ b/config/github.php
@@ -0,0 +1,6 @@
+<?php
+
+return [
+    'auth_token' => env('GITHUB_AUTH_TOKEN', ''),
+    'repo' => env('GITHUB_REPO', ''),
+];
diff --git a/config/print.php b/config/print.php
index 3e5c9f1c6..0ded57983 100644
--- a/config/print.php
+++ b/config/print.php
@@ -11,4 +11,7 @@
     'pdf_size_limit' => env('PRINT_MAX_FILE_SIZE', 5000000),
 
     'printer_name' => env('PRINTER_NAME', 'ujbela'),
+
+    'stat_additional_args' => env('PRINTER_STAT_ADDITIONAL_ARGS', ''),
+    'additional_args' => env('PRINTER_ADDITIONAL_ARGS', ''),
 ];
diff --git a/resources/views/dormitory/print/print.blade.php b/resources/views/dormitory/print/print.blade.php
index f50c5802d..8e61cb840 100644
--- a/resources/views/dormitory/print/print.blade.php
+++ b/resources/views/dormitory/print/print.blade.php
@@ -5,7 +5,7 @@
             <p>
             @lang('print.pdf_description')
             @lang("print.pdf_maxsize", ['maxsize' => config('print.pdf_size_limit')/1000/1000])
-            @lang('print.costs',['one_sided'=>App\Models\PrintAccount::$COST['one_sided'], "two_sided" => env('PRINT_COST_TWOSIDED')])
+            @lang('print.costs',['one_sided'=>App\Models\PrintAccount::$COST['one_sided'], "two_sided" => App\Models\PrintAccount::$COST['two_sided']])
             </p><p>
             @lang('print.available_money'): <b class="coli-text text-orange"> {{ user()->printAccount->balance }}</b> HUF.
             @lang('print.upload_money')
diff --git a/resources/views/emails/epistola.blade.php b/resources/views/emails/epistola.blade.php
index 6fb09bf0d..114df6b56 100644
--- a/resources/views/emails/epistola.blade.php
+++ b/resources/views/emails/epistola.blade.php
@@ -132,8 +132,8 @@
                         <a href="https://eotvos.elte.hu" target="_blank" rel="noopener">Eötvös József Collegium</a><br>
                         <img src="{{ asset('img/valasztmany_logo.png') }}" width="120" alt=""><br>
                         <p>
-                        <a href="mailto:{{env('MAIL_VALASZTMANY')}}">{{env('MAIL_VALASZTMANY')}}</a><br>
-                        <a href="mailto:{{env('MAIL_KOMMBIZ')}}">{{env('MAIL_KOMMBIZ')}}</a>
+                        <a href="mailto:{{config('contacts.mail_valasztmany')}}">{{config('contacts.mail_valasztmany')}}</a><br>
+                        <a href="mailto:{{config('contacts.mail_kommbiz')}}">{{config('contacts.mail_kommbiz')}}</a>
                         </p>
                         <div class="subcopy">
                             <p>
diff --git a/resources/views/emails/router_status_warning_resident.blade.php b/resources/views/emails/router_status_warning_resident.blade.php
index 1f412fea8..c01da62bd 100644
--- a/resources/views/emails/router_status_warning_resident.blade.php
+++ b/resources/views/emails/router_status_warning_resident.blade.php
@@ -1,6 +1,6 @@
 @component('mail::message')
 <h1>@lang('mail.dear') {{ $recipient->name }}!</h1>
 <p>
-@lang('router.router_is_down_warning_resident', ['room' => $router->room]) {{ env('MAIL_REPLYTO_ADDRESS')}}.
+@lang('router.router_is_down_warning_resident', ['room' => $router->room]) {{ config('contacts.mail_replyto_address')}}.
 </p>
 @endcomponent
diff --git a/resources/views/home.blade.php b/resources/views/home.blade.php
index edec51a09..86c249303 100644
--- a/resources/views/home.blade.php
+++ b/resources/views/home.blade.php
@@ -66,12 +66,12 @@
                 <!-- Student Council -->
                 @if(isset($contacts[\App\Models\Role::STUDENT_COUNCIL]))
                 <h5>Választmány</h5>
-                <i><a href="mailto:{{ env('MAIL_VALASZTMANY') }}">{{env('MAIL_VALASZTMANY')}}</a></i><br>
+                <i><a href="mailto:{{ config('contacts.mail_valasztmany') }}">{{config('contacts.mail_valasztmany')}}</a></i><br>
                 @foreach($contacts[\App\Models\Role::STUDENT_COUNCIL] as $roleuser)
                 <b>@lang('role.'.$roleuser->object->name)</b>:
                     <i>{{$roleuser->user?->name}}</i>
                     @if($roleuser->object->name == \App\Models\Role::PRESIDENT)
-                    <a href="mailto:{{ env('MAIL_ELNOK') }}">{{env('MAIL_ELNOK')}}</a>
+                    <a href="mailto:{{ config('contacts.mail_elnok') }}">{{config('contacts.mail_elnok')}}</a>
                     <a href="mailto:{{ $roleuser->user?->email }}">{{ $roleuser->user?->email }}</a>
                     {{ $roleuser->user?->personalInformation?->phone_number }}
                     @endif
@@ -139,7 +139,7 @@
                 <!-- Admins -->
                 @if(isset($contacts['admins']))
                 <h5>@lang('role.sys-admins')</h5>
-                <i><a href="mailto:{{ env('DEVELOPER_EMAIL') }}">{{env('DEVELOPER_EMAIL')}}</a></i><br>
+                <i><a href="mailto:{{ config('contacts.developer_email') }}">{{config('contacts.developer_email')}}</a></i><br>
                 @foreach($contacts['admins'] as $admin)
                     @if(!$loop->first)|@endif
                     <i>{{$admin->name}}</i>