Архивы IPTables

Port forwarding in iptables on NAT server

Once I needed to forward a port to a VPN server that had a gray IP address and was behind NAT.

Setting up nftables

In this article I will give examples of setting up nftables to replace the outdated iptables.

IPTables. Blocking by MAC address

In this article, I will show examples of blocking MAC addresses in IPTables.

How to save IPTables rules

In this article, I will describe several options for saving IPTables rules so that they load when the operating system starts.

IPTables Rules for BGP

I will give an example of IPTables rules for BGP.

IPTables rules for SNMP

In this article, I will give an example of IPTables rules for SNMP.
Let’s say “iptables -P INPUT DROP” is the default, which is very desirable.

IPTables quick setup script

Sometimes it is necessary, for example, to delete all IPTables rules and to add only the necessary, so for convenience, you can specify them in the script, and then execute it.

How to configure IPTables

IPTables is a command line utility that is the standard interface for managing the firewall.

IPTables rules for Asterisk AMI

Suppose the default “iptables -P INPUT ACCEPT” for all connections (and if DROP, which is very desirable, then we do not use all the DROP rules below, we only perform ACCEPT).

Since Asterisk AMI usually works on TCP port 5038, in order to open it we will execute:

ipset – a tool consisting of a kernel module, libraries and utility, allowing you to organize a list of networks, IP or MAC addresses, etc., which is very convenient to use for example with IPTables.

Installation command in Ubuntu:

Tag Archives: IPTables