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1. Cisco 2950 Generate Rsa Key On Cisco Router
2. Cisco 2950 Generate Rsa Key Generator

Creating a Self-Signed Certificate using the router's name as the! Label and using 1024bit encryption key. The label is important, I'll tell you! In a minute why C1801 (config)# The name for the keys will be: C1801% The key modulus size is 1024 bits% Generating 1024 bit RSA keys, keys will be non-exportable. Dec 18, 2004  Firstly make sure you have Catalyst 2950 Strong Cryptographic (3DES) Software on your switch. You need to create a domain name first on your switch. Ip domain-name. Then you create your private key. Crypto key generate rsa 1024. Once complete you can then SSH to the switch. You can disable telnet on your VTY lines by using. Line vty 0 4. Transport input ssh. Why can't run crypto key generate rsa The 3548 was end of sales in July 2002 ( reference ). They do not support ssh (only telnet for vty access) and thus do not have the capability to generate an RSA key. Cisco IOS Security Command Reference: Commands A to C, Cisco IOS XE Release 3SE (Catalyst 3850 Switches) 1. Crypto key generate rsa. TogenerateRivest,Shamir,andAdelman(RSA)keypairs,usethecryptokeygeneratersacommandinglobal configurationmode.

• October 2, 2015
• Posted by: Syed Shujaat
• Category: Cisco, Networking Solutions

Cisco 2950 Generate Rsa Key On Cisco Router

Use this command to generate RSA key pairs for your Cisco device (such as a router). keys are generated in pairs–one public RSA key and one private RSA key.

If your router already has RSA keys when you issue this command, you will be warned and prompted to replace the existing keys with new keys.

NOTE: Before issuing this command, ensure that your router has a hostname and IP domain name configured (with the hostname and ipdomain-name commands).

You will be unable to complete the cryptokeygeneratersacommand without a hostname and IP domain name. (This situation is not true when you generate only a named key pair.)

Here are the steps to Enable SSH and Crypto Key setup : 2 config must requried for SSH

1 Setup Local VTY line User ID and password

router (Config) # Line VTY 0 15

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router (Config-line)# login local

router (Config-line)# Exit

!!! create local login ID/Pass

router (Config)# username [loginid] password [cisco]

router (Config)# username loginid1 password cisco1

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2. router (Config)# ip domain-name example.com

router (Config)# crypto key generate rsa

how many bits in the modulus [512] :1024

Cisco 2950 Generate Rsa Key Generator

router (Config)# ip ssh version2

router (Config)# CTRL Z

This command is not saved in the router configuration; however, the RSA keys generated by this command are saved in the private configuration in NVRAM (which is never displayed to the user or backed up to another device) the next time the configuration is written to NVRAM.

Modulus Length

When you generate RSA keys, you will be prompted to enter a modulus length. The longer the modulus, the stronger the security. However, a longer modules take longer to generate (see the table below for sample times) and takes longer to use.

The size of Key Modulus range from 360 to 2048. Choosing modulus greater than 512 will take longer time.

Cisco IOS software does not support a modulus greater than 4096 bits. A length of less than 512 bits is normally not recommended. In certain situations, the shorter modulus may not function properly with IKE, so we recommend using a minimum modulus of 2048 bits.

Syntax Description : Optional Strings to embed with SSH Crypto key