From af6eebaa1a49a7365a3a56322d05854db3ddcb23 Mon Sep 17 00:00:00 2001
From: 3D-I <480857+3D-I@users.noreply.github.com>
Date: Tue, 2 Jun 2020 13:33:46 +0200
Subject: [PATCH] [ticket/16508] Fix WhoIs lookup

PHPBB3-16508
---
 phpBB/includes/functions_user.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/phpBB/includes/functions_user.php b/phpBB/includes/functions_user.php
index 9e136cc1ff..495f0dcacb 100644
--- a/phpBB/includes/functions_user.php
+++ b/phpBB/includes/functions_user.php
@@ -1473,6 +1473,7 @@ function user_ipwhois($ip)
 	if (($fsk = @fsockopen($whois_host, 43)))
 	{
 		// CRLF as per RFC3912
+		// Z to limit the query to all possible flags (whois.arin.net)
 		fputs($fsk, "z $ip\r\n");
 		while (!feof($fsk))
 		{