Here is a quick how to block a specific IP address with the IPtables Linux firewall.
Open the IPtables script :
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vi /etc/sysconfig/iptables |
To block INBOUND IP address, add the following :
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iptables -A INPUT -s 0.0.0.0 -j DROP |
To block OUTBOUND IP address :
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iptables -A OUTPUT -p tcp -d 0.0.0.0 -j DROP |
(replace 0.0.0.0 with the IP you want to block)
