topic Re: no kex alg error while file transfer via SCP in General Topics

no kex alg error while file transfer via SCP

Axe — Mon, 24 Jun 2024 10:34:38 GMT

Hello Team,

getting no kex alg error while file transfer via SCP. I am trying to upload OS image on checkpoint firewall via SCP protocol using CLI but getting no kex alg error I have tried with many ways but no luck please help me here. version running on my device is R80.

Regards,

Axe

Re: no kex alg error while file transfer via SCP

PhoneBoy — Mon, 24 Jun 2024 19:52:27 GMT

You are most likely using an R80.x release, not R80 itself, which is only for Management and was deprecated long ago.

The remote server is rejecting connection because the two sides could not agree on what encryption algorithms to use.
This is expected behavior given the vintage of OpenSSH used on older releases.
See: https://support.checkpoint.com/results/sk/sk150674

Instead of initiating the scp from the device you want to upgrade, initiate it from an external device.
You can also use sftp: https://support.checkpoint.com/results/sk/sk82281
In either case, the user in question should have a bash shell instead of clish (step 7 of sk82281).

Re: no kex alg error while file transfer via SCP

the_rock — Tue, 25 Jun 2024 01:26:37 GMT

aphoneboy got it exactly right. You need to change the shell. Plus, R80 is totally unsupported...even R81 base wont be supported in few months.

chsh -s /bin/bash admin (or whatever admin's name it is)

Andy