NETi™ Technicial Overview

ENCRYPTION

The server uses a hybrid of the RC4 encryption algorithm to encode all data sent to clients. The encryption string used can be altered by specifying text in the text box at the bottom of the query window.

Clients can also have their encryption string altered through the use of the Agent tab, (Re) set password.

When the agent receives the packet it first decodes it using its decryption string then calculates the checksum and checks both match.

The IP address of the sender and checksum are also added to the packet.

PROTOCOL

The application uses UDP port 10125 for both transmission and receipt of data.
TCP port 10126 is used for the edit file or results from running command sections.
TCP port 10127 is used for uploading data.
ICMP is used for the calculation of routes and ping. ICMP is also used in calculating the MTU.

PROCESS

After decoding, the agent carries out any Boolean filter checks. If TRUE it carries out the request.

The agent uses the IP address within the packet to reply which prevents IP spoofing being used to redirect data.
Replies are not encrypted and are pre-fixed with a number that defines the type of function carried out. This is used by the server to ignore late data returning from other requests if the data grid is changed.

When uploading data, the server sends a request to the agent containing a unique number. When the TCP session is established the agent passes this back to the server, which compares its number to that returned by the client, if both match, the session is established and the file transferred.

The agent runs as a single thread. If any abnormalities or bugs occur it immediately drops from memory without causing any difficulties to other applications.