In This Tutorial We Are Going To Learn How To Allow Or Drop Incoming,Outgoing Or Any Server Packet In IP Base Security In Firewall {Iptables}

This Is Very Easy To Configure And Very Simple Also just Follow This

Firstly Login With The Root In Linux

In This First I Will Tell You How To Disable The Services Of SSH Server For Network 1.0.0.0

Here Is The Command How To Disable The Services Of SSH Server For Network 1.0.0.0 In Linux

#iptables -t filter -A INPUT -s 1.0.0.0/8 -p 22 -j DROP

#iptables -t filter -A INPUT -s 1.0.0.0/8 -p 22 -j ACCEPT

Now I Am Going To Tell You If I Have To Drop All The Packages But I Have To Allow All Outgoing Traffic So How Can I Do 

Here Is The Command To Configure This 

#iptables -t filter -A INPUT -p -j DROP

#iptables -t filter -A OUTPUT -p -j DROP

#iptables -t filter -A FORWARDING -p -j DROP

Now How To Allow Or Block TCP Services

Now How To Block Any Particular Interface Or Particular Ip So How Can I Do 

Here Is The Command

For Particular Interface 

#iptables -t filter -i ETH0 -s 1.0.0.0/8 -j DROP

For Particular IP

#iptables -t filter -i ETH0 -s 1.0.0.100 -j DROP