TFTP & FTP Server on Centos 7

centos_logoIf you ever needed a TFTP or an anonymous FTP server to transfer files, logs, or crash debugs to and from your network devices it can be a little tricky if you don’t have anything setup. There are some free quick programs out there if you are in a pinch for one-time transfers but if you ever wanted to have something in infrastructure that is ready to go for this kind of stuff just follow this tutorial below. I’m using the latest version of Centos 7 minimal, we need to add some house keeping items first so let’s get started! Continue reading

Installing Graylog on Centos 7

Graylog-logoLet’s start out 2016 with setting up a logging system called Graylog. If you have not used Graylog before then I encourage you to check it out. This is an open source log management system and is pretty flexible as it can capture, index and analyze almost anything. Once up and running this system can be scaled out for an enterprise wide log management system. High availability, clustered, and replicated is what Graylog thrives on. In this demo I am going to have two systems. One is the Graylog server, web server and will also have a Mongo database. The other system will be an Elasticsearch node which is what will have the actual data stored in and indexed. For bigger “production” ready setups you just scale this out to separate systems. Continue reading

Setting up GNS3 1.1 on Ubuntu

gns3_logoIt’s only been a week since GNS3 1.0 was released and it’s already been updated to 1.1 so in this post I have Ubuntu 14.04 LTS with the latest updates and its time to set up GNS3. GNS3 is an open source tool that helps network professionals run a virtual network right on their computer, GNS3 is not a simulation program but rather an emulation program. So if you wanted to test a configuration change but did not want to run it on production you can run it in GNS3 instead.  This gives network professionals testing without touching any physical hardware or purchasing that expensive test lab for certification studies. Let’s get started. Continue reading

Cisco Lab Setup

When it comes to learning and getting started with Cisco there are some tools that will help out a lot like Packet Tracer, GNS3 and other emulators. These are great tools for that “simulation” of hands on learning, but you can’t always stay in that area. I find it best to get hands on with “real” Cisco Gear and so with this post I’ll go through my current setup of what I have and ask that question when it is a good time to get a lab? Just because you may want to get a lab that does not guarantee you’ll actually learn and or pass.   Continue reading

How to Configure SSH on Dell Power-Connect

Although not dealing with Cisco directly Dell switches are around in network closets and with my limited experience with them I thought this would be a perfect blog post to show the differences between Dell and Cisco. I like to think of Dell CLI like a dumb downed version of the Cisco CLI so I had some time to play around with a Dell 6248P switch and wanted to figure out how to get SSH working in the thing. Couple searches around the web and some guess and check methods I was able to get SSH working and disable telnet sessions from connecting to the switch. Compared to a Cisco switch dell has few commands when configuring SSH. This switch was configured with an IP address and user name and passwords before I touched it but I don’t think would too hard to figure out. 🙂 Continue reading