Spam Blocking with the xt_recent Kernel module
==============================================

The system loads a persistent blacklist during startup to block
known spam sources. During boot, previously saved iptables rules
are restored and each IP address from a text file is inserted
into the kernel's xt_recent list named "spambot".


Boot Configuration
------------------

	[ -f /mnt/sda/tinycore-mydata-backup/ip4tables.rules ] \
		&& iptables-restore \
			< /mnt/sda/tinycore-mydata-backup/ip4tables.rules

	[ -f /mnt/sda/tinycore-mydata-backup/ip6tables.rules ] \
		&& ip6tables-restore \
			< /mnt/sda/tinycore-mydata-backup/ip6tables.rules

	while read ip; do
		echo "+$ip" > /proc/net/xt_recent/spambot
	done < /mnt/sda/tinycore-mydata-backup/spambot.txt


Required Files
--------------

	ip4tables.rules
	ip6tables.rules
	spambot.txt


Example: spambot.txt
--------------------

	45.91.64.2


Notes
-----

The iptables rules are restored automatically during system
startup.

Each line in spambot.txt should contain a single IPv4 or IPv6
address. Every address is added to the kernel's xt_recent list
named "spambot", making the blacklist persistent across reboots
while keeping the list itself in a simple text file.