iptables is a user-space application program that allows a system administrator to configure the tables provided by the Linux kernelfirewall (implemented as different Netfilter modules) and the chains and rules it stores. Different kernel modules and programs are currently used for different protocols; iptables applies to IPv4, ip6tables to IPv6, arptables to ARP, and ebtables to Ethernet frames.
Default file iptables open full port:
- Mã: Chọn tất cả
# Generated by iptables-save v1.4.7 on Mon Dec 23 15:32:07 2013
*filter
:INPUT ACCEPT [396:30624]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [216:23216]
COMMIT
# Completed on Mon Dec 23 15:32:07 2013
Only open port 22, 80, 3306
- Mã: Chọn tất cả
# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Mon Dec 23 15:32:07 2013
Restart iptables:
- Mã: Chọn tất cả
service iptables restart
