diff -druN diablo-6-CUR-20140422-00/dreaderd/defs.h diablo-6-CUR-20140422-00-work2/dreaderd/defs.h
--- diablo-6-CUR-20140422-00/dreaderd/defs.h	2009-01-23 16:37:55.000000000 +0100
+++ diablo-6-CUR-20140422-00-work2/dreaderd/defs.h	2015-07-16 01:01:52.000000000 +0200
@@ -203,6 +205,7 @@
     int rd_MaxAgePolicy;
     int rd_TurnOffNNPH;
     int rd_XzverLevel;
+    int rd_RequireGroupCmd;
 } ReaderDef;
 
 typedef struct AccessDef {		/* Define the access list	*/
diff -druN diablo-6-CUR-20140422-00/dreaderd/dns.c diablo-6-CUR-20140422-00-work2/dreaderd/dns.c
--- diablo-6-CUR-20140422-00/dreaderd/dns.c	2015-07-06 22:21:27.000000000 +0200
+++ diablo-6-CUR-20140422-00-work2/dreaderd/dns.c	2015-07-16 01:36:29.000000000 +0200
@@ -3000,6 +2949,13 @@
 			readerdef.rd_LogCmd = 0;
 		    continue;
 		}
+		if (*val && strcmp(opt, "requiregroupcmd") == 0) {
+		    if (*val == 'y' || *val == 'Y' || *val == '1')
+			readerdef.rd_RequireGroupCmd = 1;
+		    else
+			readerdef.rd_RequireGroupCmd = 0;
+		    continue;
+		}
 #ifdef	IP_TOS
 		if (*val && strcmp(opt, "settos") == 0) {
 		    readerdef.rd_SetTOS = atoi(val);
diff -druN diablo-6-CUR-20140422-00/dreaderd/nntp.c diablo-6-CUR-20140422-00-work2/dreaderd/nntp.c
--- diablo-6-CUR-20140422-00/dreaderd/nntp.c	2009-01-23 16:37:55.000000000 +0100
+++ diablo-6-CUR-20140422-00-work2/dreaderd/nntp.c	2015-07-16 01:00:54.000000000 +0200
@@ -310,6 +310,12 @@
     ++conn->co_Auth.dr_ArtCount;
 
     conn->co_RequestFlags = ARTFETCH_MSGID;
+    if (conn->co_Auth.dr_ReaderDef->rd_RequireGroupCmd &&
+		conn->co_GroupName == NULL) {
+	MBLogPrintf(conn, &conn->co_TMBuf, "412 Not in a newsgroup\r\n");
+	NNCommand(conn);
+	return;
+    }
     if (artid == NULL) {
 	if (conn->co_GroupName == NULL) {
 	    MBLogPrintf(conn, &conn->co_TMBuf, "412 Not in a newsgroup\r\n");