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I'm trying to use Plesk Migrator to transfer data from a cpanel server. I'm using the command line version however I'm receiving an error I can't seem to fix. The same error also shows from Plesk's migrator GUI.

Failed to connect to the the source server 'cpanel' (remote-host-ip) at 'remote-host-ip' by SSH as 'remote-host-user': Incompatible ssh peer (no acceptable kex algorithm)

I've got my sshd_config setup like this,

MACs hmac-sha2-512,hmac-sha2-256,hmac-ripemd160,hmac-sha1
KexAlgorithms diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1
Ciphers 3des-cbc,blowfish-cbc,aes128-cbc,aes128-ctr,aes256-ctr

and can connect to the Cpanel Server with the normal SSH command absolutely fine using the private key, so it's escaping me why this is happening on the migrator!

Edit: Just to let you know I also have no control over the cPanel server as it's with a generic hosting provider - as said though, SSH'ing in from the Plesk server works a-okay with it.

Aloogy
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  • All control panel are offtopic here, because the questions about them were very LQ. I don't really like this rule (in my opinion, their LQ majority should be closed as LQ, the others are ontopic), but my opinion is in minority. – peterh Aug 02 '17 at 00:26

1 Answers1

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Set the following in sshd_config: 

Ciphers aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes128-ctr
MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,hmac-ripemd160,hmac-sha1
KexAlgorithms diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1

Or just comment them and migration should work.

Elvis Plesky
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