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July 2017
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How do I verify UDP port is open or not

This is very rare scenario, you need to verify the status of udp service running on the port. I found this tricks will helpful if you are trying to verify NTP server availability or VPN server presence.

Eg: nmap -p [port] -sU -P0 [host name | ip address]

a. For verify the NTP server is […]

How do I setup VPN server in Linux

As we all aware about network security and risk of sharing files over the internet. A VPN is a good options to access our files over the public as well utilizing all the resources hosted in the office network. Here I’m using community edition of “openvpn” application which has unlimited user access. Installations is fairly […]