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| author | Gabor Juhos <juhosg@openwrt.org> | 2007-10-07 17:17:04 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2007-10-07 17:17:04 +0000 |
| commit | 6958bdb20aad8a3d1dda124747529f79eec4ce7f (patch) | |
| tree | b157c9ce75f7e761524af78499e7fa6b51287758 /package/iptables/patches | |
| parent | 8853b87bdaec3392e45ec2964f9248334638edce (diff) | |
| download | master-187ad058-6958bdb20aad8a3d1dda124747529f79eec4ce7f.tar.gz master-187ad058-6958bdb20aad8a3d1dda124747529f79eec4ce7f.tar.bz2 master-187ad058-6958bdb20aad8a3d1dda124747529f79eec4ce7f.zip | |
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.patch | 106 |
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 |