diff --git a/go-server-server/go/auth.go b/go-server-server/go/auth.go
index 21c9e1b..47bff1d 100644
--- a/go-server-server/go/auth.go
+++ b/go-server-server/go/auth.go
@@ -4,6 +4,7 @@ import (
 	"log"
 	"net/http"
 	"strings"
+	"strconv"
 )
 
 func CommonNameMatch(r *http.Request) bool {
@@ -42,6 +43,11 @@ func CommonNameMatch(r *http.Request) bool {
 		}
 	}
 
-	log.Printf("error: Authentication Fail! None of the common names in the client cert match any of the trusted common names")
+	commonNames := make([]string, 0)
+	for _, peercert := range r.TLS.PeerCertificates {
+		commonNames = append(commonNames, strconv.Quote(peercert.Subject.CommonName))
+	}
+	log.Printf("error: Authentication Failed! None of the common names in the client cert chain" +
+			   " matched any of the trusted common names. Client cert common names: %v", commonNames)
 	return false;
 }
\ No newline at end of file