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BizTalk 2013 R2 SFTP adapter MACs or KexAlgorithms

Mruthunjaya jodukapli 6 Reputation points
2022-05-24T13:49:19.13+00:00

I am having open SFTP connection error [Exceptions.Types.DeliveryFailureException:Exceptions.Types.DeliveryFailureException ] from SFTP adapter in BizTalk 2013 R2.

This was working all good until there was an update on the SFTP server where certain MACs and KEX algorithms are restricted as part of the security updated and it allows only specific MACs and Kex Algorithms.

Is there a way to know or specify the MACs and Kex Algorithms with BizTalk 2013 R2 SFTP adapter.?

BizTalk Server
BizTalk Server
A family of Microsoft server products that support large-scale implementation management of enterprise application integration processes.
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  1. Mruthunjaya jodukapli 6 Reputation points
    2022-05-31T10:45:56.413+00:00

    Thank You KamleshKumar and ColinDijkgraaf.

    I did check with MS Support as well and they confirmed as below

    Biztalk 2013 R2 SFTP adapter only supports hmac-sha1, hmac-sha1-96 and hmac-md5 MACs and KEX algorithms

    1 person found this answer helpful.
  2. Kamlesh Kumar 3,866 Reputation points
    2022-05-24T14:04:29.147+00:00

    Hi There,

    Thank you for asking this question on the Microsoft Q&A Platform.

    Please check the last comment in MSDN thread, where discussed the same issue.

    https://social.msdn.microsoft.com/Forums/en-US/2bb51016-3e04-4ca5-89eb-44f1ebe6c559/initialize-error-for-sftp-adapter-in-biztalk-2013-r2?forum=biztalkgeneral

    Regards,
    Kamlesh Kumar
    BizTalk Techie

    If this answer solved your problem, please click the Verify Answer button (found below the answer) to help other users who have the same question.

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  3. Colin Dijkgraaf 1,601 Reputation points
    2022-05-24T21:19:59.807+00:00

    Unfortunately there doesn't seem any documentation about what Ciphers the BizTalk adapter for BizTalk 2013 R2 supports, nor is there any way to configure them. I hit the same issue and wrote a blog about it BizTalk SFTP – Open SFTP connection error

    In summary you have the following choices

    • Revert the SFTP to old settings (quite often not possible of the SFTP server has been upgraded)
    • Use a third party SFTP adapter that support more modern ciphers.
    • Upgrade to BizTalk 2020 (which uses WinSCP, so then at least you know what it supports and you can test prior using the WinSCP client)
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