In this chapter, you learned how to set up a firewall based on the Linux netfilter kernel-integrated firewall. Since a firewall can work well only if it is integrated in an overall server security policy, the first section of this chapter mentioned some generic security tips. After that, you learned how to use the YaST integrated program to configure the SUSE firewall, which is basically a set of scripts that allow you to create an iptables firewall easily. In the last part of this chapter, you read how to set up the netfilter firewall by hand using the iptables command. In the next chapter, you will read how to use Xen to implement virtualization on SUSE Linux Enterprise Server.
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