[cisco-voip] CUMA and ASA as Proxy

Mon Oct 26 11:16:10 EDT 2009

Out of curiosity, any particular reason why only those two certificate authorities were chosen?

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Ryan Ratliff
Sent: Monday, October 26, 2009 10:32 AM
To: Dane Newman
Cc: CiscosupportUpuck; Craig Staffin
Subject: Re: [cisco-voip] CUMA and ASA as Proxy

The outside certificate the ASA presents to the mobile phones has to be one of those specified in the documentation (GeoTrust and Verisign).  This is because the phones only come loaded with the root certificates for those two CAs, and TAC does not support the loading of 3rd party root certificates on your phones.

That said, if you want to load the GoDaddy root certificate on every phone that's going to talk to your ASA/CUMA then go for it, just don't call TAC if it isn't working (the certificate part anyway).

-Ryan

On Oct 25, 2009, at 4:23 PM, Dane Newman wrote:

Will the ASA be ok with any trusted ssl cert such as one from godaddy thats 30 bucks a year opposed to the cheapest gotrust one thats $250 a year?
On Thu, Jul 2, 2009 at 9:40 AM, Ryan Ratliff <rratliff at cisco.com<mailto:rratliff at cisco.com>> wrote:
For lab purposes you *should* be able to get it to work.  It's not TAC supported but that really doesn't matter for a demo.  I also believe Verisign has temp cert you can get for free (but it has an expiration date).

Regarding the name, it needs to match whatever you populate in the external DNS, which should resolve to the ASA.

"Obtain the IP address and fully qualified domain name for the Proxy Host"
The proxy host is your ASA.

-Ryan

On Jul 2, 2009, at 9:32 AM, Voice Noob wrote:

I have a procedure on how to make the self signed certs work on my phone.
That is the least of my problems or concerns. If it does not work that's
fine but I have to try. We are only looking at a pilot of about two phones.
If we do a customer deployment we will have them get a correct cert.

In the below step do I create the cert using the name of my Cisco ASA or of
the name of my CUMA server?

http://www.cisco.com/en/US/docs/voice_ip_comm/cuma/7_0/english/install/guide
/cuma_70_IAG_02_ASA.html

For New Installations) How to Obtain and Import the Cisco Adaptive Security
Appliance-to-Client Certificate
This procedure is required unless you are upgrading from Release 3.1.2 and
reusing your signed certificate from your Proxy Server.

This procedure has several subprocedures:

.Generate a Certificate Signing Request

.Submit the Certificate Signing Request to the Certificate Authority

.Upload the Signed Certificate to the Cisco Adaptive Security Appliance

Generate a Certificate Signing Request
Before You Begin

.Obtain the IP address and fully qualified domain name for the Proxy Host
Name as specified in Obtaining IP Addresses and DNS Names from IT, page 1-3.

.Determine required values for your company or organization name,
organizational unit, country, and state or province. See the table in
Creating Security Contexts, page 9-7. You must enter identical values in the
Cisco Adaptive Security Appliance and in the relevant security context in
Cisco Unified Mobility Advantage.

Procedure

----------------------------------------------------------------------------
----

Step 1 Enter configuration mode:

conf t

Step 2 Generate a key pair for this certificate:

crypto key generate rsa label <keypair-cuma-signed> modulus 1024

You will see a "Please wait..." message; look carefully for the prompt to
reappear.

Step 3 Create a trustpoint with the necessary information to generate the
certificate request:

crypto ca trustpoint <trustpoint-cuma-signed>

subject-name CN=<Proxy Host Name of the Cisco Unified Mobility Advantage
server. Use the Fully Qualified Domain Name.>,OU=<organization unit
name>,O=<company or organization name as publicly registered>,C=<2 letter
country code>,St=<state>,L=<city>

(For requirements for the Company, organization unit, Country, and State
values, see the values you determined in the prerequisite for this
procedure.)

keypair <keypair-cuma-signed>

fqdn <Proxy Host Name of the Cisco Unified Mobility Advantage server. This
value must exactly match the value you entered for CN above.>

enrollment terminal

Step 4 Get the certificate signing request to send to the Certificate
Authority:

crypto ca enroll <trustpoint-cuma-signed>

% Start certificate enrollment.

% The subject name in the certificate will be:CN=<Proxy Host Name of the
Cisco Unified Mobility Advantage server>,OU=<organization unit
name>,O=<organization name>,C=<2 letter country code>,St=<state>,L=<city>

% The fully-qualified domain name in the certificate will be: <Proxy Host
Name of the Cisco Unified Mobility Advantage server>

% Include the device serial number in the subject name? [yes/no]: no

% Display Certificate Request to terminal? [yes/no]: yes

Step 5 Copy the entire text of the displayed Certificate Signing Request and
paste it into a text file.

Include the following lines. Make sure that there are no extra spaces at the
end.

----BEGIN CERTIFICATE----

----END CERTIFICATE----

Step 6 Save the text file.

----------------------------------------------------------------------------
----

What To Do Next

-----Original Message-----
From: Craig Staffin [mailto:cmstaffin at gmail.com<mailto:cmstaffin at gmail.com>]
Sent: Wednesday, July 01, 2009 9:46 PM
To: Voice Noob
Cc: CiscosupportUpuck
Subject: Re: [cisco-voip] CUMA and ASA as Proxy

I am going through this battle right now

As far as self signed certs the response from the BU was that they are
completely not supported as mobile phones do not do certs "well".  In
other words if you can manage to get the CA of your domain onto your
phone it might work for a week or two but then it might fail.  The BU
states that you need to use a verisign cert or GEOTrust.

Let me know if you need more help.
On Jul 1, 2009, at 8:43 PM, Voice Noob wrote:
Has anyone deployed CUMA 7.x using the ASA as the Proxy server? I am
having a problem with the documentation on exactly how I setup the
ASA and the certificate requests. I don't know if the name I should
put into the requests is the CUMA server name or the hostname of my
ASA.

Also has anyone done this using slef signed certs with an internal
CA? I don't think I can get this company to pay for a cert from
Verisign or Geotrust. In fact I know I can't.
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