Edward Gao created GUACAMOLE-895:
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             Summary: SSH is not working for diffie-hellman-group-exchange-sha1
                 Key: GUACAMOLE-895
                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-895
             Project: Guacamole
          Issue Type: Bug
          Components: SSH
    Affects Versions: 1.0.0
            Reporter: Edward Gao
         Attachments: image-2019-10-16-10-19-05-829.png, 
image-2019-10-16-10-21-21-802.png, image-2019-10-16-10-22-04-535.png

Hi, we are using the guacamole (1.0.0) ssh function. but it failed for a 
device. below is my analysis:

when it sending the DH request, the remote side got a FIN packet.

!image-2019-10-16-10-19-05-829.png!

there are two packet results. one is from guacamole, another is from Jsch 
(another ssh tool) which using same kex method.

the different part is:

working version:

!image-2019-10-16-10-21-21-802.png!

 

fnot working version:

!image-2019-10-16-10-22-04-535.png!



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