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Dec 17, 2024
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[Update]Understanding iptables #7161

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[Update]Understanding iptables
Rajakavitha1 Dec 16, 2024
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format the table
Rajakavitha1 Dec 16, 2024
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9 changes: 8 additions & 1 deletion docs/guides/security/firewalls/what-is-iptables/index.md
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Expand Up @@ -23,7 +23,14 @@ This guide helps you understand iptables and explains what is iptables. It gets

A table is a collection of chains that serves a particular function. The 3 main tables in iptables are the Filter, NAT, and Mangle tables.

!["iptables table of tables](iptables-table-of-tables.png "iptables table of tables")
| **Filter** | **NAT** | **Mangle** |
|-------------------|--------------------------|-----------------------------------|
| INPUT chain | INPUT chain | INPUT chain |
| FORWARD chain | OUTPUT chain | FORWARD chain |
| OUTPUT chain | PREROUTING chain | OUTPUT chain |
| | POSTROUTING chain | PREROUTING chain |
| | | POSTROUTING chain |


- The **Filter Table** is used to control the flow of packets in and out of a system.
- The **NAT Table** is used to redirect connections to other interfaces on the network.
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