Communicator Mobile Certificate Error
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clear. I would never recommend that a company roll-out SIP clients (hard or soft telephones) without enacting comprehensive security policies. This applies to endpoints inside and outside the corporate network. Security is something that needs to be applied regardless of how or where users connect their office communicator certificate error devices. If a hacker can’t hack from the outside, he or she will hack from the
Office Communicator 2007 Certificate Error
inside. As I have said many times before, security is not something that can be applied in only one place. An effective strategy looks competent communicator certificate at all points of entry as well as all aspects of media transmission. When it comes to SIP clients, this means everything from login to signaling to the actual conversation. Each element has its own set of requirements and security
Avaya Communicator Certificate
methodologies. Today I would like to spend a little time on certificate management. I will be specific about how Avaya endpoints interact with certificates, but most of this discussion applies to products from most other vendors. Did you read my recent article about security – A Primer on Communications Security? If so, you know that a certificate is similar to a passport. It is used to prove the identity of an IP entity or service. For example, your bank’s website lync mobile certificate error uses a certificate to prove to your web browser that it really is your bank and not an impostor. IP communications use certificates in a number of different ways. Like that bank, they are used to ensure that different services really are what they claim to be. Besides identity and authentication, they are also used for encryption. In SIP, we deal with two forms of encryption. – signaling and media. Encryption of SIP signaling is accomplished with Transport Layer Security (TLS) and encryption of media is done with Secure Real-Time Protocol (SRTP). Used together, an enterprise can be assured that all aspects of its communication traffic remain private. For a deeper understanding of TLS, please see my article Understanding Transport Layer Security (TLS). This brings up two questions. First, do I need a certificate on my SIP client? The answer is “yes.” You will not be able to encrypt signaling or data without one. Second, how do I install a certificate on a SIP client? The answer to this question depends on what kind of client you are talking about. The steps vary for physical phones, PC clients, and mobile users. SIP Certificates on a Windows PC Let’s begin with the Windows PC client. In my case, I have run two. The Avaya One-X Communicator has been around for a few years as an H.323 client, but more recently it was enhanced to support SIP. The latest offe
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Avaya System Manager Certificate Authority
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» Communicator Sign-In Problems After OCS Certificate Renewal If you have just renewed the certificate on your OCS Front-End and are having Communicator http://blog.insideocs.com/2010/08/18/communicator-sign-in-problems-after-ocs-certificate-renewal/ sign-in issues with some clients, you might want to check that they have a updated list of trusted Root CA’s on their client machine. Some Certificate Authorities change certificate details such as the name in the “Issue By” field when a certificate is renewed, which will cause Communicator to give the infamous: “There was a problem verifying the certificate certificate error from the server. Please contact your system administrator” error. Other changes can cause certificate cross-signing issues. If you suspect that this is the case, check the details of your old certificate and new certificate and contact your Certificate Authority if there was a change. Some CA’s such as digicert have test websites that clients can point their browser to mobile certificate error and check whether this CA is trusted by their client machine. See digicert Trusted Root Authority Certificates for an example. Microsoft has a package that client machines can download to update the trusted CA list: Windows root certificate program members has a link to an update package that clients can download to update the trusted root CA list. More Information: • OCS Mac Messenger Certificate Trust Errors with Digicert (Brian Desmond Blog entry) • digicert Trusted Root Authority Certificates • digicert - Intermediate Certificate Troubleshooting If you have recently renewed the certificate on your OCS Front-End and are having Communicator sign-in issues with some clients, you might want to check that those client machines have an updated list of trusted Root CA’s on their client machine. Some Certificate Authorities change certificate details such as the name in the “Issue By” field when a certificate is renewed, which will cause Communicator to give the infamous: “There was a problem verifying the certificate from the server. Please contact your system administrator” error. Other changes can cause certificate c