mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-08-19 12:02:25 +03:00
* netfilter: add the xt_TARPIT target module required by xt_CHAOS * include/netfilter.mk: reorder, xt_CHAOS depends on xt_TARPIT and xt_DELUDE * iptables: add libipt_TARPIT to the kmod-ipt-extra package, bump release number * original patchset can be found [http://tinyurl.com/2mjk2kx here] git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9178 3c298f89-4303-0410-b956-a3cf2f4a3e73
107 lines
3.5 KiB
Diff
107 lines
3.5 KiB
Diff
diff -N -u -r iptables-1.3.8-20070817/extensions/libipt_TARPIT.c iptables-1.3.8-20070817-nf/extensions/libipt_TARPIT.c
|
|
--- iptables-1.3.8-20070817/extensions/libipt_TARPIT.c 1969-12-31 19:00:00.000000000 -0500
|
|
+++ iptables-1.3.8-20070817-nf/extensions/libipt_TARPIT.c 2007-08-18 14:49:25.000000000 -0400
|
|
@@ -0,0 +1,58 @@
|
|
+/* Shared library add-on to iptables for TARPIT support */
|
|
+#include <stdio.h>
|
|
+#include <getopt.h>
|
|
+#include <iptables.h>
|
|
+
|
|
+static void
|
|
+help(void)
|
|
+{
|
|
+ fputs(
|
|
+"TARPIT takes no options\n"
|
|
+"\n", stdout);
|
|
+}
|
|
+
|
|
+static struct option opts[] = {
|
|
+ { 0 }
|
|
+};
|
|
+
|
|
+static int
|
|
+parse(int c, char **argv, int invert, unsigned int *flags,
|
|
+ const struct ipt_entry *entry,
|
|
+ struct ipt_entry_target **target)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void final_check(unsigned int flags)
|
|
+{
|
|
+}
|
|
+
|
|
+static void
|
|
+print(const struct ipt_ip *ip,
|
|
+ const struct ipt_entry_target *target,
|
|
+ int numeric)
|
|
+{
|
|
+}
|
|
+
|
|
+static void save(const struct ipt_ip *ip, const struct ipt_entry_target *target)
|
|
+{
|
|
+}
|
|
+
|
|
+static struct iptables_target tarpit = {
|
|
+ .next = NULL,
|
|
+ .name = "TARPIT",
|
|
+ .version = IPTABLES_VERSION,
|
|
+ .size = IPT_ALIGN(0),
|
|
+ .userspacesize = IPT_ALIGN(0),
|
|
+ .help = &help,
|
|
+ .parse = &parse,
|
|
+ .final_check = &final_check,
|
|
+ .print = &print,
|
|
+ .save = &save,
|
|
+ .extra_opts = opts
|
|
+};
|
|
+
|
|
+void _init(void)
|
|
+{
|
|
+ register_target(&tarpit);
|
|
+}
|
|
diff -N -u -r iptables-1.3.8-20070817/extensions/libipt_TARPIT.man iptables-1.3.8-20070817-nf/extensions/libipt_TARPIT.man
|
|
--- iptables-1.3.8-20070817/extensions/libipt_TARPIT.man 1969-12-31 19:00:00.000000000 -0500
|
|
+++ iptables-1.3.8-20070817-nf/extensions/libipt_TARPIT.man 2007-08-18 14:49:25.000000000 -0400
|
|
@@ -0,0 +1,34 @@
|
|
+Captures and holds incoming TCP connections using no local
|
|
+per-connection resources. Connections are accepted, but immediately
|
|
+switched to the persist state (0 byte window), in which the remote
|
|
+side stops sending data and asks to continue every 60-240 seconds.
|
|
+Attempts to close the connection are ignored, forcing the remote side
|
|
+to time out the connection in 12-24 minutes.
|
|
+
|
|
+This offers similar functionality to LaBrea
|
|
+<http://www.hackbusters.net/LaBrea/> but doesn't require dedicated
|
|
+hardware or IPs. Any TCP port that you would normally DROP or REJECT
|
|
+can instead become a tarpit.
|
|
+
|
|
+To tarpit connections to TCP port 80 destined for the current machine:
|
|
+.IP
|
|
+iptables -A INPUT -p tcp -m tcp --dport 80 -j TARPIT
|
|
+.P
|
|
+To significantly slow down Code Red/Nimda-style scans of unused address
|
|
+space, forward unused ip addresses to a Linux box not acting as a router
|
|
+(e.g. "ip route 10.0.0.0 255.0.0.0 ip.of.linux.box" on a Cisco), enable IP
|
|
+forwarding on the Linux box, and add:
|
|
+.IP
|
|
+iptables -A FORWARD -p tcp -j TARPIT
|
|
+.IP
|
|
+iptables -A FORWARD -j DROP
|
|
+.TP
|
|
+NOTE:
|
|
+If you use the conntrack module while you are using TARPIT, you should
|
|
+also use the NOTRACK target, or the kernel will unnecessarily allocate
|
|
+resources for each TARPITted connection. To TARPIT incoming
|
|
+connections to the standard IRC port while using conntrack, you could:
|
|
+.IP
|
|
+iptables -t raw -A PREROUTING -p tcp --dport 6667 -j NOTRACK
|
|
+.IP
|
|
+iptables -A INPUT -p tcp --dport 6667 -j TARPIT
|
|
diff -N -u -r iptables-1.3.8-20070817/extensions/.TARPIT-test iptables-1.3.8-20070817-nf/extensions/.TARPIT-test
|
|
--- iptables-1.3.8-20070817/extensions/.TARPIT-test 1969-12-31 19:00:00.000000000 -0500
|
|
+++ iptables-1.3.8-20070817-nf/extensions/.TARPIT-test 2007-08-18 14:49:25.000000000 -0400
|
|
@@ -0,0 +1,2 @@
|
|
+#! /bin/sh
|
|
+[ -f $KERNEL_DIR/net/netfilter/xt_TARPIT.c ] && echo TARPIT
|