- Lab
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Libraries: If you want this lab, consider one of these libraries.
- Cloud
- Security

Working with IP Sets and iptables
IP Sets can facilitate the management of a complex firewall ruleset. This exercise refreshes basic skills with the `iptables` command and begins developing an understanding of working with IP Sets. Having a working knowledge of IP sets and `iptables` is a requirement of the advanced certification exams such as the LPIC-3 303-200.

Lab Info
Table of Contents
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Challenge
Create a new IP set called `clienthosts` that contains the IP and Port combinations for each client server.
Create a new IP set called
clienthosts
that contains the IP and Port combinations for each client server. Be sure theipset
is configured to persist a reboot.Run the following commands:
ipset create clienthosts hash:ip,port ipset add clienthosts 10.0.1.100,80 ipset add clienthosts 10.0.1.200,80 ipset save clienthosts > /etc/sysconfig/ipset
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Challenge
Add a new rule to the INPUT chain that accepts traffic from all IP/port combinations as source IP/destination port in the `clienthostsIP` set.
Add a new rule to the INPUT chain that accepts traffic from all IP/port combinations as source IP/destination port in the
clienthostsIP
set. The rule should persist a reboot.Run the following commands:
iptables -I INPUT -m set --match-set clienthosts src,dst -j ACCEPT iptables-save > /etc/sysconfig/iptables
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