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AuthorForum: PowerTCP SFTP & SSH for .NET
Topic: SSH Login Authentication fails after upgrading to 4.8
rajeshkanna.s

From: USA
Posts: 1
Member Since: 03/11/16
posted March 11, 2016 12:25 PM

Hi,

We have been using SSH 4.7 version control for quite sometime. After upgrading to 4.8 version, Authenticate method throws exception:

Method call : sft.Authenticate("USERNAME", "Password");

Exception details : Password authentication failed.
Inner Exception : Remote Sent corrupt MAC.
Jason Farrar (Admin)

From: USA
Posts: 223
Member Since: 07/24/07

Extra Support Options
Custom Application Development

posted March 14, 2016 9:49 AM

This error means that the MAC sent with the SFTP data packet and the calculated MAC when received do not match. We haven't had any reports of this previously so some troubleshooting will be required.

Can you please answer the following questions:
1. Do you know what server software you are connecting to?

2. What the following property values after the connection is established:
Sftp.Connection.ConnectionInfo.ClientToServerMACAlgorithm
Sftp.Connection.ConnectionInfo.ServerToClientMACAlgorithm
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