So Today i wanted to login to my old Cisco Switch 2960 from my Suse Linux when i received the following error:
Unable to negotiate with 10.1.1.1 port 22: no matching key exchange method found. Their offer: diffie-helman-group1-sha1
Note**: 10.1.1.1 is ip of my switch with username salman
1) Make sure you configure ssh keys with 1024 bits when setting it up in the switch
2) From your Linux machine issue the following command:
# ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 firstname.lastname@example.org
Tip**: For Debugging SSH, use ssh -vvv option.
If you receive such error:
no matching cipher found. Their offer: aes128-cbc,3des-cbc,aes192 cbc,aes256-cbc
Open /etc/ssh/ssh_config and un comment the following:
Now try and it should work !.
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