in this season, We will learn how to work with IP Table on the linux OS command line.
you can read more information about IP table here, if you cant know anythings about it.
IPTABLES (firewall) |
|
| Command | Description |
| # iptables -t filter -L | show all chains of filtering table |
| # iptables -t nat -L | show all chains of nat table |
| # iptables -t filter -F | clear all rules from filtering table |
| # iptables -t nat -F | clear all rules from table nat |
| # iptables -t filter -X | delete any chains created by user |
| # iptables -t filter -A INPUT -p tcp --dport telnet -j ACCEPT | allow telnet connections to input |
| # iptables -t filter -A OUTPUT -p tcp --dport http -j DROP | block HTTP connections to output |
| # iptables -t filter -A FORWARD -p tcp --dport pop3 -j ACCEPT | allow POP3 connections to forward chain |
| # iptables -t filter -A INPUT -j LOG --log-prefix | Logging on input chain |
| # iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE | configure a PAT (Port Address Traslation) on eth0 masking outbound packets |
| # iptables -t nat -A PREROUTING -d 192.168.0.1 -p tcp -m tcp --dport 22 -j DNAT --to-destination 10.0.0.2:22 | redirect packets addressed to a host to another host |
