What is VPN?

A virtual private network (VPN, is a secure network between two or more devices. It is generally used to protect data through a private tunnel. Your traffic through the VPN will always be encrypted with secure algorithms. These networks provide security against spies, and censorship of your current IPS or government.

Top 3 VPN uses

Anonymity in the network

Hide your IP address through our VPN servers in several countries.

Encrypt your communications

Our servers use secure, fast and reliable algorithms. We are talking about 256-bit SHA encryption. A high encryption of all your data. Ideal to connect when you are browsing sites with free or not reliable WIFI.

Avoid geographical restrictions

Through our VPN connection you can access all the content you want, without restrictions per country.





How to buy the service

1- Go to control panel click
2- Registered account

Note:The username will be the one used for the VPN connection

Note:Select Initial prepaid service


3- Purchase credits


4- Check that the service is active and download the configuration files





MTU size

MTU definition

The information on the internet and other networks is sent grouped in data packets. MTU (Maximum Transmission Unit) is the maximum amount of data that can be physically transmitted in a packet. Windows assigns a default value of MTU to each connection according to its type. However, it is necessary to check in practice if this value works properly in each connection.


What is the effect on an inappropriate MTU value?

If the MTU value set is too high, it can cause fragmentation and loss in the sent packets. Otherwise, if it is lower, the network capacity is not properly utilized. The MTU values assigned by Windows according to the network used are:

  • In local networks (Ethernet) = 1500 bytes
  • PPPoE networks (Point-to-Point Protocol over Ethernet) = 1492 bytes
  • PPPoE networks (Windows XP) = 1480 bytes
  • Dial-up connections = 576 bytes

Each transmission unit consists of headers or headers plus the data used. The data referred to as MSS (Maximum Segment Size), truly define the information to be sent, so the formula would be: MTU = MSS + TCP & IP headers.


Calculate MTU value:

Windows
ping [-f] [-l ] [host]
ping -f -l 1500 google.com

If result = Packet needs to be fragmented but DF set. You have to try until you fragment the package:

ping -f -l 1480 google.com
Packet needs to be fragmented but DF set
....
ping -f -l 1460 google.com
icmp_seq=0 time=1.883 ms
icmp_seq=1 time=3.353 ms

As seen in the last ping there is no fragmentation so it is the correct MTU.

Linux
ping [-M do] [-s ] [host]
ping -M do -s 1460 google.com
MAC
ping [-D] [-s ] [host]
ping -D -s 1460 google.com