Introduction

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This document describes how to generate 2048 bit key support for Certificate Signing Request (CSR) on the Cisco IronPort Encryption Appliance (IEA).

Configure

How I create RSA key and enable SSH access in Cisco VG202, in a Cisco router I use the next commands(but in a VG not exists): conf t crypto key generate rsa modulus 1024 ip domain-name domain-name ip ssh version 2 ip ssh time-out 120 ip ssh authentication-retries 3 line vty 0 4 transport input telne. Step 2: Configure the encryption key method. R1(config)# crypto key generate rsa modulus 1024. The name for the keys will be: R1.ccna-lab.com% The key modulus size is 1024 bits% Generating 1024 bit RSA keys, keys will be non-exportable OK (elapsed time was 1 seconds) R1(config)#.Jan 28 21:09:29.867:%SSH-5-ENABLED: SSH 1.99 has been enabled. 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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Jan 21, 2018  An existing CA is replaced and the new CA requires newly generated keys; for example, the required key size might have changed in an organization so you would have to delete the old 1024-bit keys and generate new 2048-bit keys. T he peer router's public keys can be deleted in order to help debug signature verification problems in IKEv1. Mar 30, 2020 I have set DNS domain name with “IP domain-name” command. Then configure the router to use RSA key pair with modulus size of 1024 bites for remote service authentication with “crypto key generate rsa ” command. Add username “Admin” with Password of “Technig” for ssh authentication. Enabled ssh with “line vty 0 4” command.

Most of the Certificate Authorities (CAs) have stated an explicit request to have all CSRs generated with a key pair of length 2048 bit. By default, IEA Version 6.5 uses 1024 bit key length for key pair generation. In order to force the IEA to generate a key pair of length 2048, use the keytool command as described here.

Generate a Certificate

1. Log in to the IEA CLI
   
2. At the main menu, type x in order to drop into the shell.
   
3. Change to the root user:
   
4. Execute the keytool in order to create a new keystore:
   
5. Execute the keytool in order to create a CSR File:
   
6. Provide the CSR file to the Certificate Authority in order to generate a certificate. Ensure you submit it as an Apache Web Server Certficate Signing Request.
7. After you receive the .cer file from the CA, proceed to the next steps.

Import a Certificate

Note: The password used when you generate the CSR must match the keystore password in order for these procedures to work. If the CSR was created off-box, the password inputted must match the keystore password in order for these procedures to work.

You must chain the Certificate correctly

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1. Each CA Certificate must be extracted from the CER file received from the CA and then merged together in a text editor.
   

   Note: This is easiest done from a Microsoft Windows machine. /generate-dns-key-tag-on-cpanel.html. Other operating systems work but are more difficult to extract.
   Certificates must be chained in this order: 1.Domain 2. Intermediate 3.Root

   
   
   1. Double-click in order to open the Certificate file (.CER file), and then click the Certification Path tab:
      
   2. Start with the mid-level of the Certification Path, click the Details tab, click Copy to File, and then name it 1.CER.
      
   3. Select Base-64 encoded X.509(.CER).
      
   4. Repeat for the Top Level CA, and name it 2.CER.
      
   5. Repeat for the server certificate, and name it 3.CER.
      
   6. Use a text editor (not notepad, but notepad++ works well) in order to open all three X.CER files and combine them in order (1 at the top, and 3 at the bottom):
      

      
      

      Note: There should be no empty lines between certificates and no empty line at the bottom.

      
      

   7. Save as <servername>.CER.
      
   8. Upload the <servername>.CER file to the IEA at /home/admin/<servername.cer> with FTP or SCP.
      
   9. Copy /home/admin/<servername.cer> to /usr/local/postx/server/conf:
      
   
   
2. Use the IEA GUI in order to import the certificate [Keys and Certificates SSL Setup].
   

   Note: Keystore = [Install Directory]/conf/enterprisenamestore.keystore or the current name of your keystore file.
   Certificate = /usr/local/postx/server/conf/NEWCERT.CER.

   
   
   1. Check Trust CA Certs.
      
   2. Click Import Certificate
      
   
   
3. (Optional -- If a new keystore must be created). From the IEA GUI, tell the IEA to use the new keystore:
   
   1. Choose Configuration Web Server and Proxies Web Server Connection Listeners HTTPS
      
   2. Type in the path to the new keystore file:
      Example: ${postx.home}/conf/2013_5_13.keystore
      
   
   
4. Deploy Changes and restart the SMTP Adapter.

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Verify

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There is currently no verification procedure available for this configuration.

Troubleshoot

There is currently no specific troubleshooting information available for this configuration.

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