Nagios Support Forum

Posted: **Tue Oct 28, 2014 1:38 pm**

I have been getting some questions/concerns about the certificate used for the NCPA agent.

I looked through on GitHub and it looks like the agents creates it's own self-signed certificate.

We have our own certificates we like to use with stronger ciphers. Is it possible to use our own certificate?

Reason I ask is because this was brought to my attention on the 1.7 Coniguration page.

Code: Select all

certificate
    EXPERIMENTAL. Allows you to specify the file name for the SSL certificate you wish to use with the NCPA server. If left adhoc, a new self-signed certificate will be generated and used for the server.

I also noticed this in the certificate.py code:

Code: Select all

def create_self_signed_cert(cert_dir, cert_file, key_file):
target_cert = os.path.join(cert_dir, cert_file)
target_key = os.path.join(cert_dir, key_file)
if not os.path.exists(target_cert) or not os.path.exists(target_key):
# create a key pair
k = OpenSSL.crypto.PKey()
k.generate_key(OpenSSL.crypto.TYPE_RSA, 1024)

I could be wrong, probably am, but it looks like it looks for a cert, and if none found generate its own keypair?
So my question really is, does the agent support using other certs instead of it's own generated one. The Experimental tag is of concern.

Posted: **Tue Oct 28, 2014 4:35 pm**

SSL and cert usage in general was added with about 1.7.0. It "SHOULD" work with external certs as you found, with the certificate config directive. I know Nick and I both tested it when he was originally putting it out, and had no issues with changing from a self assigned cert. I believe Nick was just being a bit protective there, experimental probably should be changed to *new feature* or something to better indicate that it works in our testing, just has not had extensive external testing.

Posted: **Tue Oct 28, 2014 4:44 pm**

Well consider me your external tester.

Will be tesing this sometime this week, latest will be early next week.

Will report back to this thread with results.

Posted: **Tue Oct 28, 2014 4:51 pm**

Thanks external testers are awesome! If you have any questions or issues let me know!

Posted: **Tue Oct 28, 2014 4:58 pm**

Just for verficiation. Do I provide the path or do I just place our cert in /usr/local/ncpa and specify the name in place of adhoc, ex: Change adhoc to company.crt??

Posted: **Tue Oct 28, 2014 5:06 pm**

Provide a path and filename in the config. adhoc is only used if you want ncpa to generate a cert.

Nagios Support Forum

NCPA and SSL Cert

NCPA and SSL Cert

Re: NCPA and SSL Cert

Re: NCPA and SSL Cert

Re: NCPA and SSL Cert

Re: NCPA and SSL Cert

Re: NCPA and SSL Cert