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 look how to install Gns3 to the Fedora 64 bit. Get Gns3 Installation...
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 provides 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
1 | Aug 1 05:39:30.992: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up |
Here Aug 1 05:39:30.992 is date info, %LINK-3-UPDOWN is subsystem info which says the log is...
Hi, today we will look to configure Cisco routers and switches with password. It may be seen trivial but very important for security, because a lot of issues a password related. Network devices use a lot of protocols to work and this protocols needs security. Authentication resides in security and the first rule of authentication is real check.For example if you connect a switch with telnet you should give your...
Today we will look for setting Cisco devices host name and then disable domain look up. Host name is used to identify devices in a meaningful and easy way. Change Hostname First we change hostname to ismailbaydan.com and then fall back to default hostname which is Switch
1 2 3 4 5 | S1#configure terminal S1(config)#hostname ismailbaydan.com ismailbaydan.com(config)# ismailbaydan.com(config)#default hostname Switch(config)# |
Enable Domain Lookup First we enable domain look up which is enabled by default and then disable domain look up
1 2 | Switch(config)#ip domain-lookup Switch(config)#no ip domain-lookup |
We...
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 in to two part which one is static. In static routing routes are configured in router by typing every detail of the route and all things configured are used in routing....
Hi. Today we will look for changing system time and prompt. You may think that what is the relation between system time and prompt, you are right there is no relation 🙂 . System time is important for network devices because logs get meaning with them and acl, vpn time limitations works truly with them. In order to change the system time we need enable mod not configure but I...
