Uncategorized – POFTUT

Category: Uncategorized


Tcp and Udp Port List, Names and Usage Frequency

Nmap tool provides popular ports list as a database where this list is also used in network and service scans. Here is the list but before we will look the command which will list ports according to the popularity. Nmap Top Ports Listing We can use sort command in order to list ports according to their usage frequency. The nmap port or service database located at /usr/share/nmap/nmap-services . We provide -k3 which specifies...


How To Check Integrity Of Files In Linux?

In today IT world everything connected and a lot of data in being downloaded from internet or over networks. This may create some minor problems. The data downloaded may be corrupted or there may be some intruders in network and with man of the middle attack may change our files. There are different solutions for this but simplest and fastest solution is using hash algorithms to verify file integrity. There...


How To Configure Cisco Routers and Switches Password

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...


How To Start, Stop, Restart Networking On Linux?

I have changed my network configuration and want to restart to make changes effective. Or there are some problems with my network and I think restarting it will solve my problems. Here we will look how to restart networking service in various network distributions like Ubuntu, Debian, Fedora,CentOS. Get Status Of Network Service We will get status of network with the following command. Debian, Ubuntu, Kali For deb based distributions...

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