CentOS iptables Firewall Open 80-Port method

Open ports:

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[root@wx32 ~]# iptables-i input-p tcp--dport 80-j ACCEPT

Save configuration:

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[root@wx32 ~]# Service Iptables Save Saving firewall rules to/etc/sysconfig/iptables: [OK]

Reboot the firewall:

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[root@wx32 ~]# Service iptables restart Flushing firewall rules: [OK] Setting chains to Policy Accept:filter [OK] Unloading iptables modules: [OK] Applying iptables firewall rules: [OK] Loading additional iptables modules:ip_conntrack_netbios_n[OK]

To view the configuration:

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[root@wx32 ~]# service iptables status Table:filter Chain INPUT (Policy ACCEPT) Num Target prot opt source destination 1 ACCEPT TCP--0.0.0.0/0 0.0.0.0/0 TCP dpt:80

Port View Method:

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[Root@vcentos ~]#/etc/init.d/iptables Status Table:filter Chain INPUT (Policy ACCEPT) Num Target prot opt source destination 1 ACCEPT UDP--0.0.0.0/0 0.0.0.0/0 UDP dpt:80 2 ACCEPT TCP--0.0.0.0/0 0.0.0.0/0 TCP dpt:80 3 Rh-firewall-1-input All--0.0.0.0/0 0.0.0.0/0 Chain FORWARD (Policy ACCEPT) Num Target prot opt source destination 1 Rh-firewall-1-input All--0.0.0.0/0 0.0.0.0/0

Add:

View CentOS Firewall information:/etc/init.d/iptables status

Turn off the CentOS Firewall service:/etc/init.d/iptables stop

Check that the server's 80 port is blocked by the firewall, you can use the command: Telnet server_ip 80来 test.

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1> The solution is as follows: /sbin/iptables-i input-p TCP--dport 80-j ACCEPT 2> then Save: /etc/rc.d/init.d/iptables Save 3> reboot the firewall /etc/init.d/iptables restart