Fast, Secure, Serverless File Transfers

To use NetXfer, both the sender and receiver must install and license the software. With the software running:

• The sender adds (with the + button) or drops the file on the NetXfer app.
• The sender can then copy the Transfer Packet Text from NetXfer (with CTRL+C) and send it to the receiver via a secure chat or other means.
• The receiver then pastes (CTRL+V) or loads that text into their NetXfer
• The two programs will automatically connect, transfer the file, and perform an optional MD5 check, once the file is transferred.

During the process, both the sender and receiver get updated bytes sent, time elapsed, throughput, and expected time to complete, along with a visual progress bar.

Most file transfers use TCP. With TCP, every packet is sent and returned to confirm it was received, which uses twice as much bandwidth, and requires new packets to wait while old packets are confirmed. NetXfer uses UDP, which just sends the packet once, not expecting any returns. To make sure all the packets are properly sent, the packets are marked so that the receiver will be alerted to any missing packets, and will request that they are retransmitted. This means, on good connections, the minimum number of bytes are sent to transfer the file, and on bad connections, only the lost packets are ever re-transmitted, making the transfer as efficient as possible.

The file transfer itself is encrypted within the NetXfer app sending it, and only decrypted in the receiving app. As it is never in an unencrypted state while it is on the network/internet, there is no way it can be read by anyone else, other than the intended recipient. There is also no intermediary server involved, so there is no way for a 'man in the middle' attack to be set up.
If a small bit of text data does have to be sent to the netxfer.com server to help connect the sender and receiver directly, it is also sent through https encrypted channels, and only revealed to the receiver who is given the transport packet text by the sender. Once the transfer is complete, even that non identifying text is deleted.

By default, no, but there is one instance when you may want or need www.netxfer.com to be involved: If your sender/receiver is in a network behind a firewall or NAT, then it will not be able to reach its partner directly. To get around this, NetXfer will automatically send a small block of text to www.netxfer.com, which can only be retrieved by the receiver the sender sends the text to, so that the two NetXfer applications can find each other to set up a direct connection. The text that is sent includes:

• The RX and TX IP address (local and external)
• The requested port
• A random text indicating the file ID
• The file transfer password
• Any flags associated with the file transfer

These are the same elements in the text that is sent from sender to receiver to send the file in the first place, and are deleted from the server once the transfer is complete.
NetXfer software may also reach out to www.netxfer.com to get their external IP address, similar to the www.whatsmyip.com server, but this too is fully encrypted.

The free version is for personal use only. For your work, you will need the corporate (paid) version, or the Net-X-Code Server that includes NetXfer.

For the corporate version, or the Net-X-Code Server, please contact Drastic Technologies or visit www.drastic.tv for more information.

The Net-X-Code Server Suite is designed as a Swiss Army knife type tool to handle baseband/IP video, files, partial file restore, closed caption and file transfer, supported normal Windows/Linux hardware server and VM instances, with full support for local, network and cloud storage. Net-X-Code Servers can be run standalone, or in large groups to automatically handle huge workloads under HTML UI or REST API control. For more information, please see www.netxcode.com.

FlowCaster is a secure, fast, video/audio transmission system for live 'over the shoulder' and other production and broadcast audio/video workflows. Like NetXfer, FlowCaster is generally a point to point, secure transmission system for audio and video. It supports Adobe, Avid, DaVinci, Assimilate, Nucoda and other OpenFX containers, as well as being able to transmit SDI, HDMI, SMPTE2022/2110, USB Capture Devices, UDP/RTP sources, and even your desktop. FlowCaster also includes server elements for converting between popular network protocols like RTMP, RTP, UDP, SRT, RIST, CDI and discreet files. The server version of FlowCaster is included in Net-X-Code.

NetXfer, Net-X-Code, FlowCaster, videoQC and Drastic/Drastic Technologies are all trademarks of Drastic Technologies Ltd. All software downloaded from this site is (c)opyright 2021, Drastic Technologies Ltd. All Rights Reserved.