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## Netfilter-IPTables-Diagrams.md

      
        
          
            
              
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                xiaoronglv
                / Netfilter-IPTables-Diagrams.md
            
            
              Created
              March 18, 2022 05:59
                — forked from nerdalert/Netfilter-IPTables-Diagrams.md
            
              
                Linux NetFilter, IP Tables and Conntrack Diagrams
              
          
        
      
        
  
      
    Linux NetFilter, IP Tables and Conntrack Diagrams

IPTABLES TABLES and CHAINS

IPTables has the following 4 built-in tables.

1) Filter Table
Filter is default table for iptables. So, if you don’t define you own table, you’ll be using filter table. Iptables’s filter table has the following built-in chains.