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How to block Ip ranges in Linux server
#2
If you have CSF firewall Installed , then you can simply use the below format

Note : Please replace the ip and ip ranges with the needed ones

To block 192.xxx.xxx.xxx range, use following rule

# csf -d 192.0.0.0/8

To block 192.168.xxx.xxx range, use following rule

# csf -d 192.168.0.0/16

To block 192.168.1.xxx range, use following rule

# csf -d 192.168.1.0/24

If you have no extra firewall softwares installed, then you can block using the below iptables command


To block one single ip in iptables, use the below command

# iptables -I INPUT -s 192.168.1.1 -j DROP

To block 192.xxx.xxx.xxx range, use following rule

# iptables -I INPUT -s 192.0.0.0/8 -j DROP

To block 192.168.xxx.xxx range, use following rule

# iptables -I INPUT -s 192.168.0.0/16 -j DROP

To block 192.168.1.xxx range, use following rule

# iptables -I INPUT -s 192.168.1.0/24 -j DROP

To remove the ip blocks , you can use the below
    
# iptables -D INPUT -s 192.168.1.1 -j DROP

# iptables -D INPUT -s 192.168.1.0/24 -j DROP
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Messages In This Thread
How to block Ip ranges in Linux server - by Edward - 11-02-2016, 02:27 PM
RE: How to block Ip ranges in Linux server - by Techyllinux - 11-04-2016, 07:23 AM

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