How can I make sure my VPN is encrypted and working properly?

Posted: July 19, 2012 in Expert Q&A, Troubleshoot, VPN
Tags: , , , , ,

*Editor’s Note: These columns originally appeared in TechTarget’s SearchEnterpriseWan.com

By Rainer Enders, CTO of Americas for NCP engineering

The simplest way to do this is to act like a hacker. Snoop around the network traffic, either on the device itself or a port on the network. In the case of IPsec, for example, you would see encapsulating security payload (ESP) frames (Protocol 50).  Yet, when you look inside the packet payload, you will only see garbled characters — no clear text at all. Network snooping tools are easily available on the Internet and are simple to use. Of these, Wireshark is probably the most popular tool. You may find this resource on how to do penetration testing on your VPN useful.

Can I compare performance metrics of an MPLS VPN to another network?

This is a very complex question that is difficult to answer without knowing the specifics. Performance assessments can range in effort and complexity. It is ultimately important to understand the underlying requirements, which will determine the parameters that are relevant to performance. So, first you want to define “performance:”  What are the relevant parameters, such as throughputlatencypacket loss and jitter? Once you measure the aforementioned metrics of your Layer 2 and Layer 3 MPLS VPN networks, you should be able to compare them evenly.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s