Selected cipher type <unknown> not supported by server

[Saeed42]

Whenever I ssh from my redhat8 server to one of our pix firwalls I get the above error message, does anyone have any idea what I need to do to remedy the situation
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Don't be content with being average. Average is as close to the bottom as it is to the top
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[LarryTheCucumber]

Try one of these. Depending on the PIX

ssh -c 3des remotehost

or

ssh -c blowfish remotehost

 

[Saeed42]

No I’m getting the following error message

“Selected cipher type 3des is not supported by the server “
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Don't be content with being average. Average is as close to the bottom as it is to the top
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 

[pupu]

Try -c des then. Or try -vvv and look at types of supported ciphers from remote and local host.

 

[Saeed42]

-c des seems to work but it warns me not to use it, as it's weaker encryption compare to 3des. I need to do bit more research why the pix firewall is using this version and not the newer encryptions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Don't be content with being average. Average is as close to the bottom as it is to the top
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 

[paulsomm]

Older PIX software only supports DES.