From time to time, my Thinkpad T460s starts without working WiFi. Like the WiFi card doesn’t exist. Since I was always in a rush, the easiest solution was to reboot …
Category: Networks
Time and date on CentOS 7 Howto
NTP stands for Network Transport Protocol and it is used to keep the time on the servers synced with each other using a common reliable source to get the time. …
Dia – diagram creation program
In case you need to draw a diagram from time to time, you should think about Dia. Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, …
FreeRadius install howto (4) – populating tables
In the last article about FreeRadius (Here), I wrote about basic settings and now I’ll write something about inserting users into database (MySQL). The FreeRadius database schema contains several tables: …
FreeRadius install howto (3)
In this post I will say something about FreeRadius config files, database connection, basic instruction how to insert user in database, etc. Before you step inside this post, I recommend …
FreeRadius install howto (2)
Last post about FreeRadius (available on this LINK) introduced FreeRadius and basic installation steps (install from RPM and directly from source). My advice is to install from source (frequent updates, …
Neighbour table overflow – sysctl.conf tunning
If you have a big network with the hundreds of hosts you can expect “Neighbour table overflow” error which occurs in large networks when there are two many ARP requests …
Check what ports are open
To see what ports are open in your Linux box, you can use nmap port scanner or you can use netstat. nmap can be used with following command: # nmap …
tftp server on CentOS/RHEL/Fedora
Trivial File Transfer Protocol (TFTP) is a file transfer protocol, with the functionality of a very basic form of File Transfer Protocol (FTP). It was first defined in 1980 and …