diff -u src-old/conf.h src/conf.h
--- src-old/conf.h	Wed Mar  8 04:12:21 2000
+++ src/conf.h	Mon Jan 15 14:55:15 2001
@@ -36,7 +36,8 @@
     Use at your own risk!
   -- dgreer@austintx.com
 */
-#define ASCEND_PORT_HACK
+/* #define ASCEND_PORT_HACK */
+#define CISCO_PORT_HACK
 #define ASCEND_CHANNELS_PER_LINE        23
 
 #define CISCO_ACCOUNTING_HACK
diff -u src-old/files.c src/files.c
--- src-old/files.c	Tue Sep  5 20:14:00 2000
+++ src/files.c	Mon Jan 15 15:08:26 2001
@@ -928,6 +928,24 @@
 }
 #endif
 
+#ifdef CISCO_PORT_HACK
+/*
+ *	hazard@hazard.maks.net:
+ *	Cisco is not as weird as Ascend :-), but still,
+ *	it sends port numbers using formula 20000+real_port_id if the 
+ *	call is ISDN.
+ *	This hack subtracts it if needed so that "+" works for IP addresses.
+ */
+ 
+static int cisco_port_number(int nas_port)
+{
+	if (nas_port >= 20000) {
+		nas_port -= 20000;
+	}
+	return nas_port;
+}
+#endif
+
 /*
  *	Find the named user in the database.  Create the
  *	set of attribute-value pairs to check and reply with
@@ -1032,6 +1050,9 @@
 				 */
 #ifdef ASCEND_PORT_HACK
 				nas_port = ascend_port_number(nas_port);
+#endif
+#ifdef CISCO_PORT_HACK
+				nas_port = cisco_port_number(nas_port);
 #endif
 				tmp->lvalue += nas_port;
 			}