[cisco-voip] cisco phone-vpn cert expiration

[Brian Meade (brmeade)]

That's correct.  The certificates are just in the phone's config file.  Since the phone is already connected to the VPN, it will get the new copy of the config file with both certs when you reset the phone.  You just have to be careful to not switch the certificate on the ASA until all the phones get their new config files.

Brian

From: Erick Wellnitz [mailto:ewellnitzvoip at gmail.com]
Sent: Tuesday, January 28, 2014 10:37 AM
To: Brian Meade (brmeade)
Cc: cisco-voip
Subject: Re: [cisco-voip] cisco phone-vpn cert expiration

That makes sense, I think.  The part I'm not clear on is how does the phone retrieve the new cert?  Initially, the phone has to be set up on the LAN to get the certs.  Is it because it is already connected to the VPN that it will get the new cert without bringing it back in to the office?

On Tue, Jan 28, 2014 at 9:27 AM, Brian Meade (brmeade) <brmeade at cisco.com<mailto:brmeade at cisco.com>> wrote:
Erick,

You can add a 2nd cert to the VPN Gateway configuration after you add it as a VPN-Trust.

So what you want to do is create a new trustpoint on the ASA with the new certificate, upload that to CUCM as a phone-vpn-trust, and then add it as a 2nd cert to the VPN Gateway.

You'll then want to make sure all the VPN phones get reset so they get the new certificate as well.

After all the VPN phones have both certificates, you can then change SSL on the ASA to bind to the other trustpoint and start using the new certificate.

If you follow that method, you want have to bring any of the VPN phones back in as long as they're connected.  The main problem with this method is some people have VPN phones that they rarely connect so you'll need to make sure everyone connects their phones to get the new certificate before you make the change on the ASA.

Brian

From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net>] On Behalf Of Erick Wellnitz
Sent: Tuesday, January 28, 2014 10:20 AM
To: cisco-voip
Subject: [cisco-voip] cisco phone-vpn cert expiration

I have a situation I'm sure isn't unique.

What happens when I upload a new phone-vpn cert to the CUCM to replace an expired/expiring one?

Are vpn phones going to freak out and stop authenticating to the VPN or should everything be smooth sailing?

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