Firewalld: firewall-cmd example to drop packets from specific ip

Posted on Leave a commentPosted in Linux, RHEL 7, Security

Today I spotted some attempts to perform a zone transfer from one of the DNS servers I manage.  Given this is on CentOS 7 and therefore using by default Firewalld, I had a quick read of the documentation regarding how best to drop these attempts. Here we go; firewall-cmd –zone=public –add-rich-rule=’rule family=”ipv4″ source address=”x.x.x.x” service […]

Chroot your DNS

Posted on Leave a commentPosted in Linux, RHEL 7, Security

I am in the process of setting up a new DNS service and it had been such a long time since I previously set up DNS with chroot that I need some assistance. Credit, where it is due… http://www.server-world.info/en/note?os=CentOS_7&p=dns&f=4 Also, when setting up a DNS service make sure you add an appropriate rule to your […]

Getting to grips with SELinux

Posted on Leave a commentPosted in Linux, RHCE, SELinux

Having gotten my head (for the most part) around how SELinux works, or rather where it fits within the overall Red Hat Enterprise Linux picture, I spotted a post on a Linkedin group, which piqued my interest. The post was with regards to a learning tool for SELinux.  Designed to help the reader understand the […]

Welcome

Posted on Leave a commentPosted in Uncategorized

Thanks for stopping by and visiting my online home. So, what can you expect from tobyheywood.com? Well given my background in IT it will be safe to assume that it is going to be technology focused. I have some great ideas to share over the coming months so make sure to bookmark or favourite my […]