From a25994f5263c2e102983009ae4dc2ed76a08b534 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=9B=BD=E4=BC=9F?= <366193849@qq.com>
Date: Fri, 16 Jul 2021 16:33:10 +0800
Subject: [PATCH] =?UTF-8?q?Loopback=E7=9A=84dns=E6=A3=80=E6=B5=8B?=
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---
 FastGithub.ReverseProxy/TrustedResolver.cs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/FastGithub.ReverseProxy/TrustedResolver.cs b/FastGithub.ReverseProxy/TrustedResolver.cs
index 402786f..8bd57d5 100644
--- a/FastGithub.ReverseProxy/TrustedResolver.cs
+++ b/FastGithub.ReverseProxy/TrustedResolver.cs
@@ -67,7 +67,15 @@ namespace FastGithub.ReverseProxy
                 var dnsClient = new DnsClient(endpoint);
                 var addresses = await dnsClient.Lookup(domain, DNS.Protocol.RecordType.A, cancellationToken);
                 var address = addresses?.FirstOrDefault();
-                return address ?? throw new Exception($"解析不到{domain}的ip");
+                if (address == null)
+                {
+                    throw new Exception($"解析不到{domain}的ip");
+                }
+                if (address.Equals(IPAddress.Loopback))
+                {
+                    throw new Exception($"dns受干扰，解析{domain}的ip为{IPAddress.Loopback}");
+                }
+                return address;
             }
             catch (Exception ex)
             {