Linux, Windows, Security, Programming, Network Tutorials
Google is a huge company that provides paid and free services. It mainly operates in the IT and internet area. The Internet uses DNS in order to solve domain names into IP addresses. Because internet infrastructure works with IP addresses. Google provides free DNS servers that can be used for fast and free domain resolution. … Read more
Cisco provides a different level of certification called CCNA, CCNP, CCIE for its products, and general network topics. We have already examined CCNA certifications in the following tutorial. What is CCNA or Cisco Certified Network Associate? Cisco certification exams mostly depend on practical experience. So a person who wants to get certified needs practical experience. … Read more
Cisco is very popular vendor in the IT network field. Cisco provides a lot of different type of solutions from access switch to SDN firewall. Cisco is penetrated to the network device market over the years. This will made a lot of network guys play with Cisco devices. Cisco create CCNX series certification over years. … Read more
DHCP stands for Dynamic Host Configuration Protocol. As its name suggests DHCP is used to provide configuration like Ip Address, Network Mask, DNS, Proxy, Bootp, Default Gateway, etc. to the host. But the most know and popular usage are distributing IP addresses. There is a broad range of DHCP usage scenarios. In this tutorial, we … 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