Patch by iotr Engelking <inkerman42@gmail.com> for dsniff >= 2.4b1, which
disables the filtering packets with incorrect checksum. And for any further
information, please have a look to Debian bug ID #372536.

--- dsniff-2.4b1/urlsnarf.c		2006-09-21 01:50:01.000000000 +0200
+++ dsniff-2.4b1/urlsnarf.c.checksum	2006-09-21 01:51:13.000000000 +0200
@@ -200,6 +200,7 @@
 	extern char *optarg;
 	extern int optind;
 	int c;
+	struct nids_chksum_ctl chksum_ctl;
 	
 	while ((c = getopt(argc, argv, "i:p:nvh?V")) != -1) {
 		switch (c) {
@@ -260,6 +261,12 @@
                 }
         }
 
+        chksum_ctl.netaddr = 0;
+        chksum_ctl.mask = 0;
+        chksum_ctl.action = NIDS_DONT_CHKSUM;
+
+        nids_register_chksum_ctl(&chksum_ctl, 1);
+
 	nids_run();
 	
 	/* NOTREACHED */