Technologie

1. Polecenie:
		1)iptables -t filter -L -v
Chain INPUT (policy ACCEPT 40 packets, 5258 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 43 packets, 2874 bytes)
 pkts bytes target     prot opt in     out     source               destination
		2)iptables -t nat -L -v
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
		3)iptables -t mangle -L -v
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
		4)iptables -t raw -L -v
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
		5) iptables -t security -L -v
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

2. Pokolei:
	1) iptables -t filter -F
	2) iptables -t nat -F
	3) iptables -t mangle -F
	4) iptables -t raw -F
	5) iptables -t security -F
3. iptables -A INPUT -i eth0 -j DROP
   iptables -A INPUT -i lo -j ACCEPT
4. iptables -R 2 INPUT  -i lo -j DROP
5. iptables -F INPUT
6. Plik firewall.sh

#!/bin/bash

echo 'Ad a'
iptables -F
iptables -X
echo 'Ad b.'
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT
iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

echo 'Ad. c'
iptables -A INPUT -i lo -j ACCEPT
echo 'Ad d.'

echo 'Ad e.'
iptables -A INPUT -s ii.uwb.edu.pl -j DROP
iptables -A OUTPUT -d ii.uwb.edu.pl -j DROP
echo 'Ad.f'
iptables -A FORWARD -d 192.168.1.253 -m multiport -p tcp --dports 23,22,80,110,443,8080 -j ACCEPT

7. iptables -t filter -F