--- src/knockd.c.orig	2005-06-27 05:11:34.000000000 +0000
+++ src/knockd.c	2010-01-09 10:43:08.000000000 +0000
@@ -193,7 +193,7 @@
 		}
 	}
 
-	cap = pcap_open_live(o_int, 65535, 0, 0, pcapErr);
+	cap = pcap_open_live(o_int, BUFSIZ, 0, 0, pcapErr);
 	if(strlen(pcapErr)) {
 		fprintf(stderr, "could not open %s: %s\n", o_int, pcapErr);
 	}