From 82f8f22e4c7d6b4b3d29ca0c876167476a4005d5 Mon Sep 17 00:00:00 2001
From: Shreyas Zare <shreyas@technitium.com>
Date: Sun, 3 Mar 2019 19:29:21 +0530
Subject: [PATCH] added X-Real-IP support to get client IP from reverse proxy.

---
 DnsServerCore/DnsWebService.cs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/DnsServerCore/DnsWebService.cs b/DnsServerCore/DnsWebService.cs
index fb310deb..c811ceb0 100644
--- a/DnsServerCore/DnsWebService.cs
+++ b/DnsServerCore/DnsWebService.cs
@@ -536,8 +536,16 @@ namespace DnsServerCore
                     return;
                 }
 
+                string xRealIp = request.Headers["X-Real-IP"];
                 string xForwardedFor = request.Headers["X-Forwarded-For"];
-                if (!string.IsNullOrEmpty(xForwardedFor))
+
+                if (!string.IsNullOrEmpty(xRealIp))
+                {
+                    //get the real IP address of the requesting client from X-Real-IP header set in nginx proxy_pass block
+
+                    remoteEP = new IPEndPoint(IPAddress.Parse(xRealIp), 0);
+                }
+                else if (!string.IsNullOrEmpty(xForwardedFor))
                 {
                     //get the real IP address of the requesting client from X-Forwarded-For header set in nginx proxy_pass block
                     string[] xForwardedForParts = xForwardedFor.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);