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Jan 22, 2020 Symptom: To be able to SSH: a) We generate RSA keys first, however this fails with: ASR1K(config)#crypto key generate rsa modulus 2048 The name for the keys will be: asr1k.cisco.com% The key modulus size is 2048 bits% Generating 2048 bit RSA keys, keys will be non-exportable.

• Solved: I have a Cisco 1811W running 12.4(6)T2 (c181x-advipservicesk9-mz.124-6.T2.bin), and I'm wanting to turn off telnet access to it and turn on SSH which I usually do on all the routers I manage, but on this particular router when I put in the.
• Aug 22, 2013.
• I've configured the following command in ASR 1002: - hostname - domain name - generate rsa certificate - transport input telnet ssh on line vty. I telnet the port 22 on ASR, it is open. But when i connect using SecureCRT, the router doesn't challenge me for username & password. I wonder why i cannot ssh the ASR. I've checked the IOS, it.
• Dec 26, 2013  so it looks as if there is no point in the 'crypto key generate rsa' command if i follow it up with the 'crypto key generate rsa usage-keys label sshkeys mod 1024' command, i just wanted to make sure the first wasn't need for the second to work or something screwy like that.

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Cisco Asr Generate Rsa Key In Linux

KB ID 0001322

Problem

I’ve lost count of the number of times this has happened to me! Most of my colleagues prefer to use the ASDM for remote management, but if (like me) you work at command line, then sometimes people <ahem> forget to generate the RSA keypair when deploying a firewall. Then even if SSH access and AAA is setup correctly, you still can’t get in via SSH. Instead you see the following;

RoyalTS and RoyalTSX: ssh_exchange_identification: Connection closed by remote host.

PuTTY: PuTTY Fatal Error: Server unexpectedly closed network connection.

SecureCRT: Connection closed.

OSX/Linux: ssh_exchange_identification: Connection closed by remote host.

Now at command line you can fix this with a ‘Crypto Key Generate RSA Modulus 2048‘ command, but you can’t get to command line only ASDM.

Solution

On older versions of the ASDM you could generate the keypair in the Identification Certificates section (well you still can but only if you are also generating a certificate request file). Call of duty 5 serial key generator. So, as we are command line warriors, lets use the ASDM’s command line!

Tools > Command Line Interface > Multiple Line

Send > Wait a couple of minutes and try again.

REMEMBER: I’m assuming you have SSH setup correctly if not, see the following article;

Cisco Asr Crypto Key Generate Rsa

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