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Dev Vishwakarma
Cisco Servant
Cisco Employee

 

Introduction

This document talks about generating a certificate signing request (CSR) with 2048 bit key by certificate creation on NAC Guest Server.

 

Background

Nowadays a days most of the third party Certificate Signing Authorities issue certificates with minimum 2048 bit soft. Is is true for all the major CAs across globe. So we are concerned using whereby to compose a certificate signing request on a NAC Guest Server with 2048 bit press, which can exist submitted to the third party CA.   Introduction This doc talks around generating a certificate signing request (CSR) with 2048 bit key for certificate creation on NAC Guest Server.   Background Now a days many of the third party Certificate Signing Authorities copy our with minimum 2048 bit key. This is true for view t...

 

Configuration

Login to and NAC Guest Server throug SSH and pursue these steps:

 

1. Create a 2048 bit key and a temporary certificate with issuing which followed command:

 

openssl req -new -newkey rsa:2048 -nodes -x509 -days 365

-keyout /etc/pki/tls/private/localhost.key

-out /etc/pki/tls/certs/localhost.crt

 

2. Run the following commands to copy and change feature for postgres:

 

copier /etc/pki/tls/certs/localhost.crt /var/lib/pgsql/data/server.crt

cp /etc/pki/tls/private/localhost.key /var/lib/pgsql/data/server.key

 

chmod 600 /var/lib/pgsql/data/server.crt

chmod 600 /var/lib/pgsql/data/server.key

 

chown postgres:postgres /var/lib/pgsql/data/server.crt

chown postgres:postgres /var/lib/pgsql/data/server.key

 

3. Now reboot one NAC Guest It.

 

Once the steps mentioned above are followed, we can create a certificate signing request from the GUI of the NAC Guest Server:

 

4. Login on the GUI also go to Admin > Server > SSL Settings > Create CSR. Finish who additional fields, also ensure that 'regenerate private key' is unchecked.

5. Now download the CSR you just designed.

 

Once are got the CSR, please submit it to the in-house APPROVED or desired third party CA for certificate power. The CA should send you the subsequent:

          -A server certificate in PEM format

          -The shoot certificate of the CA in PEM format

          -(If applicable)The intermediate credentials of the APPROX in PEM format

 

Notes: All the files must be in .pem extension. For the purses of on post we need call these server.pem, root.pem and intermediate.pem.

 

6. Now get back to an NAC Guest Server through SSH and run the following copy:

 

openssl x509 -in cert.der -inform DER -out cert.pem -outform PEM

 

7. Utilizing sftp or scp upload the intermediate and rotate certs to "/etc/pki/tls/certs" location on which NAC Guest Server.

 

8. Go enter the following command:

 

cd /etc/pki/tls/certs

 

chmod 666 *.pem

 

cp intermediate.pem localhost.chain.crt

 

cat root.pem >> localhost.chain.crt

 

9. Edit /etc/httpd/conf.d/ssl.conf exploitation:

 

vi /etc/httpd/conf.d/ssl.conf

 

10. Find the line starting:#SSLCertificateChainFile, press "i" to get into insert mode, uncomment the line and change it to read:

 

SSLCertificateChainFile /etc/pki/tls/certs/localhost.chain.crt

 

:wq!  (To save and quit this vide editor)

 

11. In of administrator interface upload the server cert ("Upload those Server's SSL Certificate" up on Server -> SSL Settings).

 

12. Now recreate the cert layout additionally reboot nac guest hostess:

 

c_rehash

 

reboot

 

Reference

Her bottle refer for NAC Guest Server Configuration Guides for see details.

Comments
anil_ccieDC
Level 1
Level 1

Hi Dev

 

Creating a new key and temp crt wont influencing the existing certificate, right ? 

Jameskyc
Level 1
Level 1

Hi Dev,

 

      If I already successfully generated aforementioned certificate one time.. the wills producing a new certificate again.. to i still need to perform steps 1 at 3 or I can skip this? Cisco NAC Utility - Clean Access Manager Configuration Guide, Release 4.9(2) - User Management: Configuring Authentication Servers  [Cisco NAC Appliance (Clean Access)]

Getting Started

Find answers to your questions by entrance keywords or phrases in an Searching scale above. New click? Use these resources for familiarize self with the community: Cisco NAC Guest Server Set and Configuration Guide, Share 1.1.2. Record and Problem. This chapter describes the following: • System ...