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My iptables firewall

Posted 10-14-2014 at 10:33 PM by sag47

Recently I posted about my firewall. Here I'm reposting that to my blog.

Here's a redacted version of my firewall rules. I'll point out a couple of things. This firewall is designed similarly to how the new RHEL7 firewalld behaves. When evaluating RHEL7 I saw some cool firewall tricks and incorporated it into my firewall (this way you can take advantage of doing things like dynamically adding and removing rules without having to refresh the firewall).

At the top...

sag47

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iptables workstation config

Posted 11-17-2013 at 10:03 AM by sag47
Updated 11-17-2013 at 11:07 AM by sag47

Tags iptables, ufw

Here's a decent iptables for a workstation that doesn't normally serve hosted applications. It is meant to just block the network while allowing the user to still use the network unhindered. If services will need to connect to your system then you'll have to open ports in the firewall.

Code:

#load firewall config with iptables-restore < iptables.rules
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
#The following rules required

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sag47

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Limiting and blocking connections dynamically.

Posted 10-31-2011 at 03:46 PM by sag47
Updated 01-29-2014 at 11:14 AM by sag47

Tags fail2ban, iptables, security, selinux

Today I feel like talking about limiting connections which get made to a server. There are a few ways to do it; some cooler than others. I'd like to feature some open source software while I'm at it.

Today I happened upon this thread which hilariously got closed for good reason. Once you wade through all the crap you'll see some pretty cool posts which explain how to limit incoming connections within a certain time period and other suggestions. I'll point out the most useful related...

sag47

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Views 2619 Comments 0 sag47 is offline