I have SCP and SFTP transfers failing from my linux VPS server (CentOS6.5) to my local desktop Mac. The transfer starts buy fails within the first minute with the error message - "Corrupted MAC on input.Disconnecting: Packet corrupt lost connection"
I've read the other threads on this forum but neither seems to be applicable.
I've tried this from 3 different machines at the same location. All 3 give the same error, so I'm pretty sure this is not a NIC issue with the local computers.
I've had the VPS provider check the server and there doesn't seem to be any hardware issue on that end. In fact they can run the scp download from there.
cPanel tech support says, "The 'MAC' in this error message actually means 'Message Authentication Code' rather than 'Media Access Control' and a corrupted MAC in SSH means that, as the error message also states, a data packet has either been corrupted in transit possibly done intentionally by an attacker, although much more likely caused by bad hardware (or a bad NIC driver) somewhere in between you and the server. If the hardware and other network equipment check out on both ends, then the SSH packets could also be corrupted in transit by a network provider."
I've been successfully doing this same SCP transfer weekly over a year. It's the transfer of the weekly cPanel server backup.
The only thing that has changed has been that I switched from DSL to cable internet. Of course with nothing else to go on the internet provider is passing the buck at this point.
I'm wondering if besides something the provider is doing, if there is anything in the modem that could be the cause, or could be setup differently. It's a Cisco DPC3825 DOCSIS 3.0 Gateway.
Thanks for any other clues you might have to offer.