On 2/26/24 21:17, Lew Wolfgang wrote:
But realize that scp encrypts the data going over the link. Last year I tried some bandwidth tests and managed to speed the transfers up by a factor of 2.5 or so with encryption turned off. One doesn't need it when sending data between computers in the same equipment rack! Unfortunately it isn't easy to turn off scp encryption, you need to install rcp and munge. I had it working under Leap 42, but not under any of the 15.x releases. I didn't try to hard though.
Correction: I didn't turn off transit encryption in scp, I did it for rsync. Rsync allows one to specify a different "shell" than ssh, you can specify rsh. But Leap repos don't offer plain rsh anymore, there's a mrsh instead. This version using munge for secure authentication, leaving the data transfers unenrypted. It's a shame that ssh/scp don't allow the encryption to be turned off. Transit compression can be turned off. Not all connection scenarios benefit from encryption. One could try to get mrsh/munge working, but I failed the last time I tried. I may look into it again. Regards, Lew