Screenshot of AS-File Transfer 6.40
An encrypted file-sharing program for computer-to-computer, either over the Internet or inside the LAN. The client program sends the files and the server program receives them. A password is required to send files to the server. Can resume interrupted transfers. Communicates with TCP through port 4520. (Note: The recipient of files has to make sure that the port that the server listens on is open all the way.)
> Download AS-File Transfer 6.40 (Zip, 2.70 MB)
Revision Date: 2020-07-08.
Unicode Support: Yes.
Program Type: Portable, x64.
Operating System(s): Windows 7 (SP1+), 8.1 and 10. (Also Windows Server 2012 R2 and 2016.)
Language(s): English and Swedish.
This is the program's official website - download the program here to get the latest version/revision. The program is free.
Keep in mind that all participants must use the same version.
If you need your IP Address, you can use my website IP Address or my program AS-CopyIP 1.30. If the sender is on the same network, it's most convenient to use the computer name. However, I have also made a program to show all your local IP Addresses, AS-Local IPs 1.10.
The server supports IPv6, by listening on all available adapters. The client also supports IPv6, but may need some help on the way. If you specify an address that contains colon, the client automatically selects IPv6, otherwise it tries to connect with IPv4. In those cases where you want to use IPv6, even if the address does not contain colon, you start the client with the parameter "/IPv6".
Is the encryption a bottleneck?
It depends on your computer's performance and how much bandwidth you have, and the counterparty's performance and bandwidth. The programs use a very strong encryption that can easily become a bottleneck. On my computer, with the processor Intel Core i3-9100, the programs are able to encrypt approximately 32 MB/sec. which is the same as 256 Mb/sec. Therefore, I need to have more bandwidth than 256 Mb/sec. in order for the encryption to be a bottleneck. The programs rarely load the entire processor as the encryption is single-threaded.