Ubuntu cannot connect to Cisco Router

Please follow these steps if you cannot can connect to a router. For example

ssh [email protected]

Output

Unable to negotiate with blog.wapnet.nl port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1

use the -o parameter

ssh -o KexAlgorithms=+diffie-hellman-group1-sha1 [email protected]

Output:

Unable to negotiate with blog.wapnet.nl port 22: no matching cipher found. Their offer: aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc

and add the -c parameter

ssh -o KexAlgorithms=+diffie-hellman-group1-sha1 -c aes256-cbc  [email protected]

and you are connected 🙂

The authenticity of host 'blog.wapnet.nl' can't be established.
RSA key fingerprint is SHA256:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Are you sure you want to continue connecting (yes/no/[fingerprint])?

Author: Thomas Faddegon

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