Script freenetis ipset
Z Freenetis Wiki
################################################################################## #! /bin/sh # # # # Skript pro presmerovani ip adres. Data jsou nacitana automaticky z freenetisu. # # # # autor Sevcik Roman 2009 # # email sevcik.roman@slfree.net # # # ################################################################################## IPTABLES=/usr/local/sbin/iptables IP_SELF=10.143.128.1 IP_SELF1=10.143.129.0 IP_TARGET=212.111.4.121 PORT_WEB=80 PORT_REDIRECT=36000
SET_URL_RANGES=http://freenetis.slfree.net/cs/redirect/ipset/ranges SET_URL_PARTNERS=http://freenetis.slfree.net/cs/redirect/ipset/partners SET_URL_MEMBERS=http://freenetis.slfree.net/cs/redirect/ipset/members
# Funkce testuje jestli je dana ip validne zapsana
# @param ip adresa
# return 1 pokud je ip validni
function valid_ip()
{
local ip=$1
local stat=1
if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
OIFS=$IFS
IFS='.'
ip=($ip)
IFS=$OIFS
[[ ${ip[0]} -le 255 && ${ip[1]} -le 255 && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
stat=$?
fi
return $stat
}
# Funkce testuje jestli je dany subnet validne zapsany
# @param subnet
# return 1 pokud je subnet validni
function valid_subnet()
{
local subnet=$1
local stat=1
if [[ $subnet =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\/[0-9]{1,2}$ ]]; then
OIFS=$IFS
IFS='/'
subnet=($subnet)
IFS='.'
ip=${subnet[0]}
ip=($ip)
mask=${subnet[1]}
IFS=$OIFS
[[ ${ip[0]} -le 255 && ${ip[1]} -le 255 && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
$mask -le 31
stat=$?
fi
return $stat
}
function update()
{
#Vymazeme obsah vsech setu
echo "Erasing content of sets.";
ipset -F ranges
ipset -F partners
ipset -F members
echo "Downloading data";
wget -q -O /tmp/ranges $SET_URL_RANGES
wget -q -O /tmp/partners $SET_URL_PARTNERS
wget -q -O /tmp/members $SET_URL_MEMBERS
BAKIFS=$IFS
IFS=$(echo -en "\n\b")
exec 3<&0
#Plnime set partners
echo "Filling set partnets.";
exec 0</tmp/partners
while read LINE
do
if valid_subnet $LINE; then echo "$LINE - added to set partners."; ipset -A partners $LINE; else echo "$LINE - not valid subnet."; fi
done
#Plnime set members
echo "Filling set members.";
exec 0</tmp/members
while read LINE
do
if valid_ip $LINE; then echo "$LINE - added to set members."; ipset -A members $LINE; else echo "$LINE - not valid IP address."; fi
done
#Plnime set ranges - je nutne aby se plnil az na konci. Jinak by byly presmerovane ip v dobe kdy se set nenbers a partners teprve plni.
echo "Filling set ranges.";
exec 0</tmp/ranges
while read LINE
do
if valid_subnet $LINE; then echo "$LINE - added to set ranges."; ipset -A ranges $LINE; else echo "$LINE - not valid subnet."; fi
done
exec 0<&3
IFS=$BAKIFS
#Cleaning up
rm /tmp/ranges
rm /tmp/partners
rm /tmp/members
}
case "$1" in start)
echo "Adding sets.";
ipset -N ranges nethash --hashsize 1024 --probes 4 --resize 50
ipset -N partners nethash --hashsize 1024 --probes 4 --resize 50
ipset -N members iphash --hashsize 10000 --probes 8 --resize 50
echo "Adding firewall rules.";
#Pravidlo pro pridani ip do setu members. Pokud projde firewallem packet na danou cilovou ip prida se zdrojova ip do setu members.
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -d $IP_TARGET -j SET --add-set members src
#Pokud uz je ip v setu members nebo partners neaplikuje se presmerovani.
$IPTABLES -t nat -A PREROUTING -m set --set partners src -j ACCEPT
$IPTABLES -t nat -A PREROUTING -m set --set members src -j ACCEPT
#Povoleni portu 36000 pro potreby presmerovani. Na tomto portu nasloucha webserver a provede presmerovani na zvolenou url.
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p tcp --dport $PORT_REDIRECT -j ACCEPT
#Presmerovani vseho co miri do internetu a ma cilovy port 80 na port 36000.
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p tcp --dport $PORT_WEB -j REDIRECT --to-port $PORT_REDIRECT
#Vyjimky ip adres a portu ktere budou fungovat i po presmerovani.
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p icmp -d $IP_SELF -j ACCEPT
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p udp -d $IP_SELF --dport 53 -j ACCEPT
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p tcp -d $IP_SELF --dport 22 -j ACCEPT
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p icmp -d $IP_SELF1 -j ACCEPT
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p udp -d $IP_SELF1 --dport 53 -j ACCEPT
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p tcp -d $IP_SELF1 --dport 22 -j ACCEPT
#Vyjimka pro kecalka pro podporu
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p tcp -d 67.23.29.84 --dport 80 -j ACCEPT
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -p tcp -d 67.23.27.61 --dport 80 -j ACCEPT
#Jinak vse ostatni zahod.
$IPTABLES -t nat -A PREROUTING -m set --set ranges src -j DROP
exit 1
;;
restart)
$0 stop
$0 start
exit 1
;;
update)
update
exit 1
;;
stop)
echo "Deleting firewall rules.";
#Pravidlo pro pridani ip do setu members. Pokud projde firewallem packet na danou cilovou ip prida se zdrojova ip do setu members.
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -d $IP_TARGET -j SET --add-set members src
#Pokud uz je ip v setu members nebo partners neaplikuje se presmerovani.
$IPTABLES -t nat -D PREROUTING -m set --set partners src -j ACCEPT
$IPTABLES -t nat -D PREROUTING -m set --set members src -j ACCEPT
#Povoleni portu 36000 pro potreby presmerovani. Na tomto portu nasloucha webserver a provede presmerovani na zvolenou url.
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p tcp --dport $PORT_REDIRECT -j ACCEPT
#Presmerovani vseho co miri do internetu a ma cilovy port 80 na port 36000.
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p tcp --dport $PORT_WEB -j REDIRECT --to-port $PORT_REDIRECT
#Vyjimky ip adres a portu ktere budou fungovat i po presmerovani.
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p icmp -d $IP_SELF -j ACCEPT
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p udp -d $IP_SELF --dport 53 -j ACCEPT
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p tcp -d $IP_SELF --dport 22 -j ACCEPT
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p icmp -d $IP_SELF1 -j ACCEPT
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p udp -d $IP_SELF1 --dport 53 -j ACCEPT
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p tcp -d $IP_SELF1 --dport 22 -j ACCEPT
#Vyjimka pro kecalka pro podporu
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p tcp -d 67.23.29.84 --dport 80 -j ACCEPT
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -p tcp -d 67.23.27.61 --dport 80 -j ACCEPT
#Jinak vse ostatni zahod.
$IPTABLES -t nat -D PREROUTING -m set --set ranges src -j DROP
echo "Deleting sets.";
ipset -X ranges
ipset -X partners
ipset -X members
exit 1
;;
esac
exit 0
