diff --git a/ChangeLog b/ChangeLog
index 99e3ac392..567663dab 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,9 @@
 1.9.43
+Core:
+  * FIX: Fix error when entering correct proxy URLs with ports and proxy schemas.
+         Entering correct proxy URLS with ports and one of the following schemas
+         (tcp, udp, unix, udg, ssl, tls) would cause an error (Invalid format given)
+         even though these proxies are correct.
 
 1.9.42
 Security:
diff --git a/share/server/core/classes/GlobalMainCfg.php b/share/server/core/classes/GlobalMainCfg.php
index 50d3daa39..1e3812085 100644
--- a/share/server/core/classes/GlobalMainCfg.php
+++ b/share/server/core/classes/GlobalMainCfg.php
@@ -179,7 +179,7 @@ public function __construct() {
                 'http_proxy' => array(
                     'must'    => 0,
                     'default' => null,
-                    'match'   => MATCH_STRING_URL,
+                    'match'   => MATCH_STRING_PROXY,
                 ),
                 'http_proxy_auth' => array(
                     'must'    => 0,
diff --git a/share/server/core/defines/matches.php b/share/server/core/defines/matches.php
index 67de92072..bb520b4ae 100644
--- a/share/server/core/defines/matches.php
+++ b/share/server/core/defines/matches.php
@@ -40,8 +40,11 @@
 define('MATCH_STRING_PATH', '/^[0-9a-z\s_.\-\/\\\]+$/i');
 define('MATCH_STRING_PATH_AUTHORISATION', '/^(?!' . DISALLOWED_AUTHORISATION_PATHS . ')[0-9a-z\s_.\-\/\\\]+$/i');
 define('MATCH_ALLOWED_URL_SCHEMES', '(http|https)');
-define('MATCH_STRING_URL', '/^(?:' . MATCH_ALLOWED_URL_SCHEMES . ':)?[0-9a-z\s;|+[\]()=%?&_,.\-#@=\/\\\~\{\}]+$/i');
-define('MATCH_STRING_URL_EMPTY', '/^(?:' . MATCH_ALLOWED_URL_SCHEMES . ':)?[0-9a-z\s;|+[\]()=%?&_,.\-#@=\/\\\~]*$/i');
+define('MATCH_ALLOWED_PROXY_SCHEMES', '(tcp|udp|unix|udg|ssl|tls)');
+define('MATCH_PORT', '(?::[0-9]+)?');
+define('MATCH_STRING_PROXY', '/^(?:' . MATCH_ALLOWED_PROXY_SCHEMES . ':)?[0-9a-z\s;|+[\]()=%?&_,.\-#@=\/\\\~\{\}:]+' . MATCH_PORT . '$/i');
+define('MATCH_STRING_URL', '/^(?:' . MATCH_ALLOWED_URL_SCHEMES . ':)?[0-9a-z\s;|+[\]()=%?&_,.\-#@=\/\\\~\{\}:]+' . MATCH_PORT . '$/i');
+define('MATCH_STRING_URL_EMPTY', '/^(?:' . MATCH_ALLOWED_URL_SCHEMES . ':)?[0-9a-z\s;|+[\]()=%?&_,.\-#@=\/\\\~:]*' . MATCH_PORT . '$/i');
 define('MATCH_GADGET_OPT', '/^[0-9a-z\s:+[\]()_.,\-&?!#@=\/\\\%]+$/i');
 define('MATCH_STRING_STYLE', '/^[0-9a-z:;\-+%#(),.]*$/i');
 define('MATCH_COORDS',       '/^(?:(?:[0-9]+)|([a-z0-9]+(?:%[+-][0-9]+)?))$/');