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Old 10-13-2015, 03:58 PM
geodude geodude is offline
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Join Date: Oct 2015
Posts: 2
difference in key exchange

In Session Options -> SSH -> Key exchange
what is the difference between diffie-hellman and diffie-hellman-group?

I'm trying to connect to switches and they say they only take diffie-hellman.
Is diffie-hellman the same as df group1? or is diffie-hellman-group df group1?

I'm pretty confused!
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Old 10-13-2015, 04:40 PM
rtb rtb is offline
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Join Date: Aug 2008
Posts: 4,306
Hi geodude,

Thanks for the post. You may want to read the RFCs to really find out about the differences between the various versions of diffie-hellman.

Here is a line from the trace options output of a connection:
[LOCAL] : Available Remote Kex Methods = diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
Here is the correlation of the three older versions of Diffie-Hellman from the trace options output to the options in SecureCRT:
Diffie-Hellman = diffie-hellman-group1-sha1
Diffie-Hellman-Group14 = diffie-hellman-group14-sha1
Diffie-Hellman-Group = diffie-hellman-group-exchange-sha1
Does this help to answer your question?

VanDyke Software
Technical Support
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Old 10-13-2015, 05:10 PM
geodude geodude is offline
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Join Date: Oct 2015
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Yep, answers my question.

thanks a lot!
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