Linux, Windows, Security, Programming, Network Tutorials
Operating systems are an important part of today’s IT systems. During history, different types of operating systems are developed with different methodologies, licenses, prices, and features. Even most of us do not know there are hundreds of operating systems where only a dozen of them continued and most of them vanished. What Is Operating System? … Read more
Gns3 very useful tool to simulate real networks and systems. In the first days of its Gns3 was simple Cisco IOS image emulator. But recent years its development has gained momentum. This made Gns3 a multi-platform, flexible real-world simulator. Gns3 supports systems like Cisco, Juniper, Palo Alto, Pfsense, Docker, etc. In this tutorial, we will … Read more
Hi, collecting logs are important. In my daily job, I am working with logs about a lot of systems like WMware, Application, Linux, Windows, Cisco, checkpoint, pfSense. Logs provide info about the system, application, etc. Security incident management systems heavily rely on logs. Example Log Logs consist of date system name and event detail like … Read more
Hi, today we will look to configure Cisco routers and switches with a password. It may be seen as trivial but very important for security because a lot of issues a password related. Network devices use a lot of protocols to work and these protocols needs security. Authentication resides in security and the first rule … Read more
Today we will look for setting Cisco devices hostname and then disable domain lookup. The hostname is used to identify devices in a meaningful and easy way. Change Hostname First, we change the hostname to ismailbaydan.com and then fall back to default hostname which is Switch S1#configure terminal S1(config)#hostname ismailbaydan.com ismailbaydan.com(config)# ismailbaydan.com(config)#default hostname Switch(config)# Enable … Read more
Hi, today we will look for some networking stuff. Up to now, I have not written any routing-related technical post. In this article, I am gonna show you some simple dynamic routing with RIP protocol. Routing is divided into two part which one is static. In static routing, routes are configured in the router by … Read more
Hi. Today we will look for changing the system time and prompt. You may think that what is the relation between system time and prompt, you are right there are no relation:). System time is important for network devices because logs get meaning with them and ACL, VPN time limitations work truly with them. In … Read more