What firewall can be used on a Self-Managed Server?

Linux servers

All Linux distributions have a netfilter utility, IPtables, which will enable a system administrator to set up a locally hosted, software based firewall on a Linux host. IPtables natively supports stateful packet inspection, packet filtering by MAC address, TCP header inspection and rate packet limiting.

For more information please consult www.netfilter.org.

Microsoft Windows servers

Microsoft Windows Servers come standard with a built-in firewall that can be activated on the host at any time. For more information and instructions to set up and manage the Windows Firewall, refer to Microsoft TechNet.