D3 and mvBase

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  • 1.  Moving from Centos 7 to Rocky Linux 9.4 - AccuTerm 8 not working when trying to connect SSH

    PARTNER
    Posted 05-13-2024 10:09

    I was migrating to a new server running Rocky Linux 9.4 and everything is working good. D3 installed, Cups working, migrated all Linux users, etc.

    When using Putty SSH it all works.

    But when I try to connect via AccuTerm 8 Secure Shell SSH version: auto, I get:

    No supported signature scheme exists (SSH).  -   and when I click to view details it says.

    No supported SSH2 signature scheme exists. The list of supported signature schemes received from the remote host does not contain a scheme supported by the local machine. SSH_ERROR_UNSUPPORTED_SIGN). Note: Accuterm's SSH2 implementation supports "ssh-dss'" and "ssh-rsa" signature schemes.



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    Steve Shourds
    VP
    Perfection Software Inc
    North Palm Beach FL US
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  • 2.  RE: Moving from Centos 7 to Rocky Linux 9.4 - AccuTerm 8 not working when trying to connect SSH

    PARTNER
    Posted 05-13-2024 13:37

    Rocket is saying AccuTerm 8.0.x is not going to work. They are forcing an upgrade to AccuTerm 8.1.1.1135

    Does anyone know a workaround to get 8.0.x working? Maybe some way to downgrade Rocky to "ssh-dss" or "ssh-rsa"?

    Thanks..



    ------------------------------
    Steve Shourds
    VP
    Perfection Software Inc
    North Palm Beach FL US
    ------------------------------

    Original Message


  • 3.  RE: Moving from Centos 7 to Rocky Linux 9.4 - AccuTerm 8 not working when trying to connect SSH

    Posted 05-14-2024 11:12

    I think I ran into this also.  Have you tried changing the Cryptographic policy to Legacy?



    ------------------------------
    Steve Caspers
    Murphy Automotive Inc
    Rosemount MN US
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    Original Message


  • 4.  RE: Moving from Centos 7 to Rocky Linux 9.4 - AccuTerm 8 not working when trying to connect SSH

    Posted 05-14-2024 11:11

    I've seen that many times where older versions of one side or the other no longer supports a particular encryption scheme.  While you probably cannot downgrade the repository package from Rocky, you could go to openssh.org, find a version that will work, build and install it in /usr/local and use that as your ssh server instead.  Then when accumterm has been upgraded to the latest crypto, you can switch back.



    ------------------------------
    Tom Marracci
    General Manager
    Aircraft Spruce
    corona CA US
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    Original Message


  • 5.  RE: Moving from Centos 7 to Rocky Linux 9.4 - AccuTerm 8 not working when trying to connect SSH

    PARTNER
    Posted 05-14-2024 11:29

    RSA is being deprecated due to vulnerabilities. If you look through the below link you will find some options to try server side.

    I have a similar issue and have just started looking into it! I haven't played with it yet but have a look and see if there is something useful there. 

    https://askubuntu.com/questions/1409105/ubuntu-22-04-ssh-the-rsa-key-isnt-working-since-upgrading-from-20-04

    Cheers

    Tom



    ------------------------------
    Tom Power
    Owner
    Power Business Systems
    Benoni ZA
    ------------------------------

    Original Message


  • 6.  RE: Moving from Centos 7 to Rocky Linux 9.4 - AccuTerm 8 not working when trying to connect SSH

    PARTNER
    Posted 05-14-2024 14:01

    I just found this and it worked. Not the best solution, but better than spending a bunch of money and time to redeploy AccuTerm. Thanks!

    update-crypto-policies --set DEFAULT:SHA1


    ------------------------------
    Steve Shourds
    VP
    Perfection Software Inc
    North Palm Beach FL US
    ------------------------------

    Original Message