CloudShark Blog

From the shark's mouth

Friday, Jul 28, 2017

Using the Wireless Networks tool to see other networks around you

When an wireless access point wants to advertise its available networks, it sends out 802.11 beacon frames. These frames are seen by other 802.11 receiving radios, and if you can capture those frames, you can use CloudShark’s Wireless Networks tool to see all of the wireless networks (named with their SSIDs) nearby. Alternatively, when Wifi stations come online, they may send out a frame called a “Probe Request”. An access point can respond to these requests with a “Probe Response”.

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Monday, Jul 24, 2017

Examining Network Delay with Wireless Retries

Ever since the folks at Aerohive decided to integrate HiveManger NG with CloudShark, we’ve been excited to play around to see what exactly we can learn from looking at packet captures from wireless networks. So, naturally, our CloudShark dev and support guru Tom was happy to jump on it when we got some of their Access Points here at CloudShark. Our network is a bit tricky, since our sister product CDRouter is busy testing all sorts of broadband routers and wireless APs with their networks on, so he brought it out of the noise and tested it at home for a night.

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Thursday, Jul 13, 2017

Merging Captures from Multiple Wifi Radio Interfaces

Today’s Wireless Access Points have multiple radio interfaces (for the 2.4 GHz and 5 GHz ranges) that can both host Wifi clients. What if you want to see capture data from both? Aerohive’s HiveManagerNG lets you capture on both of these interfaces at the same time. This makes two different captures, but with CloudShark’s Merge feature you can put them together and view all of the packets going through your AP at once.

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Thursday, Jul 6, 2017

Learning how to Troubleshoot WiFi

Now that we have our new Aerohive APs in our office, we’ve been excited to learn more about wireless troubleshooting and debugging. The built-in packet capture feature in HiveManager NG makes getting traces into CloudShark for analysis really easy. Now that we have the traces, what do we do with them? We wanted to put together a list of some of the resources that have helped us get started learning about the 802.

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Thursday, Jun 29, 2017

What can I do with my Aerohive captures once they are in CloudShark?

By now you’ve signed up for a CloudShark account and probably pushed your first capture from HiveManager NG into your repository. Where do you go from here? What sort of things should you be looking for? What exactly have I captured? A packet capture file sourced from your Aerohive device contains a record of all network traffic that passed through the interface you chose when doing your capture. In HiveManager NG, if you have captured on a WLAN interface, this will be 802.

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CloudShark is made by QA Cafe, a technology company based in Portsmouth, NH. Our passion for packet captures has grown out of our other product CDRouter.

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