From 0e65c509897724afaf960bbd39530271ee75452a Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Fri, 6 Apr 2018 02:47:58 +0200
Subject: [PATCH] Do not consider SERVFAIL responses as server failures

---
 dnscrypt-proxy/proxy.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dnscrypt-proxy/proxy.go b/dnscrypt-proxy/proxy.go
index 3b5cb5d9..42a957b3 100644
--- a/dnscrypt-proxy/proxy.go
+++ b/dnscrypt-proxy/proxy.go
@@ -314,7 +314,7 @@ func (proxy *Proxy) processIncomingQuery(serverInfo *ServerInfo, clientProto str
 			serverInfo.noticeFailure(proxy)
 			return
 		}
-		if rcode := Rcode(response); rcode == 2 || rcode == 5 { // SERVFAIL / REFUSED
+		if rcode := Rcode(response); rcode == 5 { // REFUSED
 			dlog.Infof("Server [%v] returned error code [%v] -- It might be experiencing upstream connectivity issues", serverInfo.Name, rcode)
 			serverInfo.noticeFailure(proxy)
 		} else {