One of the most common things I do on Linux machines is open ports to test software in a development environment. In the past, that meant trying to remember (and Googling) cryptic iptables commands. Now, CentOS 7 and Red Hat 7 include the nicer firewall-cmd tool to configure the firewall.
Archives For Network
The instant a Linux server is connected to a public network it starts getting hit by attackers. There are people out there running programs constantly against IP ranges and they’ve hit your server today a number of times. You need to lock down your ssh access – we’ll show you a couple ways to do this!
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Some time in your life you’ll run across an Apache server that always has tons of TIME_WAIT connections just seeming to hang out. While these don’t take up as many resources as an ESTABLISHED connection, why keep them around so long? This short article will show you how to identify how many you have, and how to tell your server to reduce them, reuse and recycle them (see, recycling IS a good thing).
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I’ve noticed recently that a new install of CSF won’t have statistics enabled by default. Here’s how to enable them…
