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Saved by uncleflo on September 12th, 2013.
CentOS has an extremely powerful firewall built in, commonly referred to as iptables, but more accurately is iptables/netfilter. Iptables is the userspace module, the bit that you, the user, interact with at the command line to enter firewall rules into predefined tables. Netfilter is a kernel module, built into the kernel, that actually does the filtering. There are many GUI front ends for iptables that allow users to add or define rules based on a point and click user interface, but these often lack the flexibility of using the command line interface and limit the users understanding of what's really happening. We're going to learn the command line interface of iptables.
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Saved by uncleflo on September 12th, 2013.
In our last “iptables Tips and Tricks” installment, we talked about Advanced Policy Firewall (APF) configuration, so it should come as no surprise that in this installment, we’re turning our attention to ConfigServer Security & Firewall (CSF). Before we get started, you should probably run through the list of warnings I include at the top of the APF blog post and make sure you have your Band-Aid ready in case you need it.
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Saved by uncleflo on July 14th, 2013.
Before proceeding, you must make sure: You must have a working PPP connection, You must have an extra Ethernet interface card in your computer with which to share your connection. Sharing PPP Connection
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