From 109f26eedccde90e96459745bfe5025e19a7aafb Mon Sep 17 00:00:00 2001
From: Andrew Hanushevsky <abh@stanford.edu>
Date: Fri, 6 Dec 2019 17:34:19 -0800
Subject: [PATCH] [Server] Use correct mechanism to determine DNS registration.

---
 src/XrdNet/XrdNetAddrInfo.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/XrdNet/XrdNetAddrInfo.cc b/src/XrdNet/XrdNetAddrInfo.cc
index 874dc1ed9f9..46ad09a929b 100644
--- a/src/XrdNet/XrdNetAddrInfo.cc
+++ b/src/XrdNet/XrdNetAddrInfo.cc
@@ -235,7 +235,7 @@ bool XrdNetAddrInfo::isRegistered()
 // Simply see if we can resolve this name
 //
    if (!(hName = Name())) return false;
-   return isalpha(*hName);
+   return isHostName(hName);
 }
   
 /******************************************************************************/