The key can be read from. CiscoルータやCatalystのIOSでcrypto key generate rsaコマンドを使い、暗号化用の.Configuring SSH – CertificationKits.com Configuration of a Cisco 1841 in PacketTracer, for SSH GitHub Cisco Cloud Services Router 1000V with Cisco IOS XE NIAP Generate RSA keys on Cisco PIX and ASA Firewalls – Nav Gill Blog (Optional) Specifies that the RSA key. Aug 22, 2013. Running openssl rsa -in myKey.pem -check says 'RSA key ok' then proceeds to convert it to what you're expecting to see. The documentation is misleading as it suggests that what you're doing should result in an RSA key (visibly obvious via the comments at either end) – Robbie Averill Apr 18 '16 at 22:12. Jan 15, 2020 b) Disable SSH server by: - removing RSA keys ('crypto key zeroize rsa'). Or - pointing SSH server to non-existing RSA keypair ('ip ssh rsa keypair-name FAKE'). This method will allow to disable SSH server but keep RSA keys for other purposes (IPsec, SSL, etc).
The new version of OpenSSH does not support RSA Host Keys less than 1024 bits in length
The switch by default has an RSA Host Key of less than 1024 bits
The solution is as follows:
Generate Rsa Key Command
You can actually get away with (for now) using Bitvise SSH on Windows and enabling the disabled Algorithms, etc. to allow you to connect to the Cisco device.
Run the following commands to zeroize and re-generate your host RSA key:
Cisco Switch Can't Generate Crypto Key Rsa
Now you should be able to successfully SSH from your Mac.