Cisco

Telnet gibi güvenlik açığı olan bir protokol kullanmak yerine giriş bilgilerinizi ve verileri akışlarınızı şifreleyecek daha güvenli olan bir protokol olanSecure Shell (SSH) kullanabilirsiniz. Bu sizi ve verilerinizi daha güvende hisetmenizi sağlayacaktır.
Şimdi adım adım SSH nasıl kurulacağını göreceğiz:

1. Hostname settings are made:

Router(config)#hostname techsoftcenter

2. The domain name is set (here hostname and domain name are required to generate encrypted keys):

Todd(config)#ip domain-name techsoftcenter.com

3. Encrypted keys are generated to securely conduct the session:

GNS3 is a platform that allows you to create a simulation of a lab environment in a virtual environment without the need to interact directly with network equipment. Thanks to the graphic interface, users can establish a real network structure and make the necessary test studies. GNS3 can run on Windows, Linux, and MAcOSx.

GNS3 software is freeware. It allows you to test the products of many manufacturers. For network devices such as Cisco, Huawei, Mikrotik, etc.

Often after installing PacketTracer 7, we get an error like the one below.

error while loading shared libraries: libpng12.so.0: cannot open shared object file: No such file or directory

Now let’s see how to fix this error.

After downloading the Packet Tracer, open the terminal in the same directory and extract it from the compressed tar.gz file.

sudo tar -zxvf packetracer7.tar.gz

Let’s enter the folder with the files we opened, if we are in the same directory, let’s run the install bash file without doing anything.

The Cisco Packet Tracer’s latest version or desired version is downloaded from the netcad site or you can download it here without having to sign up. (Download for Cisco Packet Tracer 7.2 64-bit Linux) It’s up to you.

Open the terminal by pressing the keyboard from the Ubuntu Terminal (Ctrl + Alt + t) and extract the tar file:

$ cd ~/Downloads
$ tar xzvf PacketTracer7.2forLinux64bit.tar.gz

packet_tracer_tar

Start the installation from the tar file we opened. And create a directory. Command for the directory.

Cisco packet tracer is a simulation program that provides us a laboratory environment where we can perform many networked experiments and applications without the need of physical network devices and tools.

Now let’s start installing this program.

You can download the application from many web sites on the internet as well as cisco official site can be downloaded after becoming a member.

Cisco Packet Tracer can be downloaded from the links below.