1. Back up iptables first
# cp /etc/sysconfig/iptables /var/tmp
You need to open port 80 and specify the IP and LAN address
The meaning of the following three lines:
Close all ports 80 first
Open 80 ports on the IP segment 192.168.1.0/24
Open 80 ports of the IP segment of the 211.123.16.123/24 IP segment
# iptables -I INPUT -p tcp --dport 80 -j DROP
# iptables -I INPUT -s 192.168.1.0/24 -p tcp --dport 80 -j ACCEPT
# iptables -I INPUT -s 211.123.16.123/24 -p tcp --dport 80 -j ACCEPT
The above is a temporary setting.
2. Then save iptables
# service iptables save
3. Restart the firewall
#service iptables restart
===============The following is a reprint ================================================
The following are the ports, all of them are blocked before some IPs are opened
iptables -I INPUT -p tcp --dport 9889 -j DROP
iptables -I INPUT -s 192.168.1.0/24 -p tcp --dport 9889 -j ACCEPT
If NAT forwarding is used, remember to cooperate with the following to take effect
iptables -I FORWARD -p tcp --dport 80 -j DROP
iptables -I FORWARD -s 192.168.1.0/24 -p tcp --dport 80 -j ACCEPT
The commonly used IPTABLES rules are as follows:
You can only send and receive emails, everything else is closed
iptables -I Filter -m mac --mac-source 00:0F:EA:25:51:37 -j DROP
iptables -I Filter -m mac --mac-source 00:0F:EA:25:51:37 -p udp --dport 53 -j ACCEPT
iptables -I Filter -m mac --mac-source 00:0F:EA:25:51:37 -p tcp --dport 25 -j ACCEPT
iptables -I Filter -m mac --mac-source 00:0F:EA:25:51:37 -p tcp --dport 110 -j ACCEPT
IPSEC NAT Policy
iptables -I PFWanPriv -d 192.168.100.2 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp --dport 80 -d $INTERNET_ADDR -j DNAT --to-destination 192.168.100.2:80
iptables -t nat -A PREROUTING -p tcp --dport 1723 -d $INTERNET_ADDR -j DNAT --to-destination 192.168.100.2:1723
iptables -t nat -A PREROUTING -p udp --dport 1723 -d $INTERNET_ADDR -j DNAT --to-destination 192.168.100.2:1723
iptables -t nat -A PREROUTING -p udp --dport 500 -d $INTERNET_ADDR -j DNAT --to-destination 192.168.100.2:500
iptables -t nat -A PREROUTING -p udp --dport 4500 -d $INTERNET_ADDR -j DNAT --to-destination 192.168.100.2:4500
NAT for FTP server
iptables -I PFWanPriv -p tcp --dport 21 -d 192.168.100.200 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp --dport 21 -d $INTERNET_ADDR -j DNAT --to-destination 192.168.100.200:21
Only the specified URL is allowed
iptables -A Filter -p udp --dport 53 -j ACCEPT
iptables -A Filter -p tcp --dport 53 -j ACCEPT
iptables -A Filter -d www.3322.org -j ACCEPT
iptables -A Filter -d img.cn99.com -j ACCEPT
iptables -A Filter -j DROP
Some ports of an IP are open, and others are closed
iptables -A Filter -p tcp --dport 80 -s 192.168.100.200 -d www.pconline.com.cn -j ACCEPT
iptables -A Filter -p tcp --dport 25 -s 192.168.100.200 -j ACCEPT
iptables -A Filter -p tcp --dport 109 -s 192.168.100.200 -j ACCEPT
iptables -A Filter -p tcp --dport 110 -s 192.168.100.200 -j ACCEPT
iptables -A Filter -p tcp --dport 53 -j ACCEPT
iptables -A Filter -p udp --dport 53 -j ACCEPT
iptables -A Filter -j DROP
Multiple ports
iptables -A Filter -p tcp -m multiport --destination-port 22,53,80,110 -s 192.168.20.3 -j REJECT
Continuous port
iptables -A Filter -p tcp -m multiport --source-port 22,53,80,110 -s 192.168.20.3 -j REJECT iptables -A Filter -p tcp --source-port 2:80 -s 192.168.20.3 -j REJECT
Specify the time to surf the Internet
iptables -A Filter -s 10.10.10.253 -m time --timestart 6:00 --timestop 11:00 --days Mon,Tue,Wed,Thu,Fri,Sat,Sun -j DROP
iptables -A Filter -m time --timestart 12:00 --timestop 13:00 --days Mon,Tue,Wed,Thu,Fri,Sat,Sun -j ACCEPT
iptables -A Filter -m time --timestart 17:30 --timestop 8:30 --days Mon,Tue,Wed,Thu,Fri,Sat,Sun -j ACCEPT
Multiple port services are prohibited
iptables -A Filter -m multiport -p tcp --dport 21,23,80 -j ACCEPT
NAT the WAN port to the PC
iptables -t nat -A PREROUTING -i $INTERNET_IF -d $INTERNET_ADDR -j DNAT --to-destination 192.168.0.1
NAT port 8000 to 192. 168。 100。 200 ports of 80
iptables -t nat -A PREROUTING -p tcp --dport 8000 -d $INTERNET_ADDR -j DNAT --to-destination 192.168.100.200:80
The port that the MAIL server wants to forward
iptables -t nat -A PREROUTING -p tcp --dport 110 -d $INTERNET_ADDR -j DNAT --to-destination 192.168.100.200:110
iptables -t nat -A PREROUTING -p tcp --dport 25 -d $INTERNET_ADDR -j DNAT --to-destination 192.168.100.200:25
Only PING 202 is allowed. 96。 134。 133. Other services are prohibited
iptables -A Filter -p icmp -s 192.168.100.200 -d 202.96.134.133 -j ACCEPT
iptables -A Filter -j DROP
Disable BT configuration
iptables –A Filter –p tcp –dport 6000:20000 –j DROP
Disable the QQ firewall configuration
iptables -A Filter -p udp --dport ! 53 -j DROP
iptables -A Filter -d 218.17.209.0/24 -j DROP
iptables -A Filter -d 218.18.95.0/24 -j DROP
iptables -A Filter -d 219.133.40.177 -j DROP
Based on MAC, it can only send and receive emails, and reject all others
iptables -I Filter -m mac --mac-source 00:0A:EB:97:79:A1 -j DROP
iptables -I Filter -m mac --mac-source 00:0A:EB:97:79:A1 -p tcp --dport 25 -j ACCEPT
iptables -I Filter -m mac --mac-source 00:0A:EB:97:79:A1 -p tcp --dport 110 -j ACCEPT
Disable MSN configuration
iptables -A Filter -p udp --dport 9 -j DROP
iptables -A Filter -p tcp --dport 1863 -j DROP
iptables -A Filter -p tcp --dport 80 -d 207.68.178.238 -j DROP
iptables -A Filter -p tcp --dport 80 -d 207.46.110.0/24 -j DROP
Only PING 202 is allowed. 96。 134。 133 PING is not allowed on other public network IPs
iptables -A Filter -p icmp -s 192.168.100.200 -d 202.96.134.133 -j ACCEPT
iptables -A Filter -p icmp -j DROP
Prohibit a MAC address from accessing the Internet:
iptables -I Filter -m mac --mac-source 00:20:18:8F:72:F8 -j DROP
Ping to an IP address:
iptables –A Filter –p icmp –s 192.168.0.1 –j DROP
Prohibit an IP address from serving:
iptables –A Filter -p tcp -s 192.168.0.1 --dport 80 -j DROP
iptables –A Filter -p udp -s 192.168.0.1 --dport 53 -j DROP
Only certain services are allowed, others are rejected (2 rules)
iptables -A Filter -p tcp -s 192.168.0.1 --dport 1000 -j ACCEPT
iptables -A Filter -j DROP
A port service for an IP address is prohibited
iptables -A Filter -p tcp -s 10.10.10.253 --dport 80 -j ACCEPT
iptables -A Filter -p tcp -s 10.10.10.253 --dport 80 -j DROP
Prohibit a port service for a MAC address
iptables -I Filter -p tcp -m mac --mac-source 00:20:18:8F:72:F8 --dport 80 -j DROP
Prohibit a MAC address from accessing the Internet:
iptables -I Filter -m mac --mac-source 00:11:22:33:44:55 -j DROP
Ping to an IP address:
iptables –A Filter –p icmp –s 192.168.0.1 –j DROP
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Posted on 12/17/2015 10:02:49 PM
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Landlord|
Posted on 12/17/2015 10:16:55 PM
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