2 of 3 for patch-o-matic-ng
PATCH 1/1 2 of 3 for patch-o-matic-ng
This match filter is an extension of the ideas in PSD, though it is a complete rewrite. It matches TCP/UDP/ICMP connections on a per IP basis that exceed a proscribed weight. I use it to detect port scan attacks from a single source.
Signature · 2 lines
Tim Gardner - [email protected] www.tpi.com 406-443-5357
psdp/help +12 -0
@@ -0,0 +1,12 @@ +This filter extends the original PSD filter. It will keep track +of connections from a single source IP address and assign weighting +based on the destination port (for TCP/UDP) or ICMP type. + +Examples: + +# This will match all packets from a single IP source address that exceed the weight +# threshold of 16. The memory for this IP address is released after 20 seconds +# of inactivity. The filter information for active IP addresses can be seen in +# /proc/net/mypsdp. +# +iptables -A FORWARD -m psdp --psdp-name mypsdp --psdp-weight-threshold 16 --psdp-delay-threshold 20000 --psdp-lo-ports-weight 1 --psdp-hi-ports-weight 3 -j DROP
psdp/info +6 -0
@@ -0,0 +1,6 @@ +Author: Tim Gardner <[email protected]> +Status: Stable +Repository: extra +Depends: hash +Recompile: netfilter +Recompile: iptables
psdp/iptables/extensions/libipt_psdp.c +288 -0
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psdp/iptables/extensions/libipt_psdp.man +2 -0
@@ -0,0 +1,2 @@ +This filter is used to detect an excessive number of connections from any +single IP address.
psdp/iptables/extensions/.psdp-test +3 -0
@@ -0,0 +1,3 @@ +#!/bin/sh +# True if psdp is applied. +[ -f $KERNEL_DIR/include/linux/netfilter_ipv4/ipt_psdp.h ] && echo psdp
psdp/linux/include/linux/netfilter_ipv4/ipt_psdp.h +72 -0
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psdp/linux/net/ipv4/netfilter/Config.in.ladd +2 -0
@@ -0,0 +1,2 @@ + dep_tristate ' MAC address match support' CONFIG_IP_NF_MATCH_MAC $CONFIG_IP_NF_IPTABLES + dep_tristate ' PSD Plus filter support.' CONFIG_IP_NF_PSDP $CONFIG_IP_NF_HASH
psdp/linux/net/ipv4/netfilter/ipt_psdp.c +1152 -0
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psdp/linux/net/ipv4/netfilter/Kconfig.ladd +6 -0
@@ -0,0 +1,6 @@ +config IP_NF_PSDP + tristate "PSD Plus match filter support" + help + Allows Port Scan Detection of multiple destinations from + one source address. +
psdp/linux/net/ipv4/netfilter/Makefile.ladd +2 -0
@@ -0,0 +1,2 @@ +obj-$(CONFIG_IP_NF_NAT) += iptable_nat.o +obj-$(CONFIG_IP_NF_PSDP) += ipt_psdp.o