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authorGabor Juhos <juhosg@openwrt.org>2007-10-07 17:17:04 +0000
committerGabor Juhos <juhosg@openwrt.org>2007-10-07 17:17:04 +0000
commit6958bdb20aad8a3d1dda124747529f79eec4ce7f (patch)
treeb157c9ce75f7e761524af78499e7fa6b51287758 /package/iptables/patches
parent8853b87bdaec3392e45ec2964f9248334638edce (diff)
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add TARPIT support to netfilter/iptables
* 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
Diffstat (limited to 'package/iptables/patches')
-rw-r--r--package/iptables/patches/009-tarpit-support.patch106
1 files changed, 106 insertions, 0 deletions
diff --git a/package/iptables/patches/009-tarpit-support.patch b/package/iptables/patches/009-tarpit-support.patch
new file mode 100644
index 0000000000..3105379877
--- /dev/null
+++ b/package/iptables/patches/009-tarpit-support.patch
@@ -0,0 +1,106 @@
+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