Page Events FAQs

Page Events FAQs

This article offers insight into how Page Events are generated and clarifies some of the misconceptions related to Page Events.

What do Page Events capture?

Page Events provide visibility into web pages accessed by an end-user. All the resources required for rendering a web page (images, ads, html) and any user activity, like uploading a file, are summarized into a single page event.

How are Page Events generated?

Page Events are generated based on heuristics algorithm with a balance between volume of events generated and captured user web activity. The algorithm enforces certain match criteria to summarize all the URL requests (including URLs clicked by the user and URLs used for page rendering, like images) originating on a web page into a Page Event. The core element of the algorithm is as follows.

  1. Page URL response content-length is > 3K bytes
  2. Page URL response content-type is text/html
  3. More than 10 urls with the referrer set to the Page URL
  4. There is a 60 seconds wait time to meet the third criteria

When the above core algorithm is not met there is an additional enhancement added to roll up the collected data into a URL domain Page Event with a wait time of 120 seconds.

What are the session fields in a Page Event?

Here are examples of session fields and corresponding meaning.

  • Req Count: Total number of requests received from end-user web-client (Browser, Native-app)
  • Resp Count: Total number of responses received from destination site
  • Bytes Uploaded: Total number of bytes received from end-user web-client
  • Bytes Downloaded: Total number of bytes received from destination site
  • Total Bytes: Sum of bytes uploaded and downloaded
  • HTTP Transactions: Total number of request/response pair.
What is the relationship between Skope IT Application, Sites, and Users screens and Page Events?

Applications, Users, and Sites data is computed from Page Events. A summarization process is continuously run on the Page Events to update the Application, Sites, and User data.

What is the Impact of Steering Bypass or SSL bypass policies on Page Events?

When traffic is steered to the Netskope proxy and bypassed, either due to a steering bypass configuration or a SSL do-not decrypt policy, this can impact Page Events generation. The requests that are bypassed can cause the third algorithm criteria to not be satisfied. Reduced Page Events emitted will also have a direct impact on Application, Sites, and Users summarization. Please note that when traffic is bypassed, the Netskope proxy service generates a Page Event with the Bypass Traffic field set to yes, and these events are suppressed at the rate of 1 event per domain per minute. These bypassed events do not capture the total bytes transferred as well.

Are there Page Events for traffic that is not steered with Bypass Traffic set to No?

The Page Event algorithm relies on the Referrer field to aggregate the URLs into a Page Event. For example, when a user is visiting a CNN site, there can be Ad requests to GoogleAds. So every GoogleAd request will have the Referrer field set to CNN and a Page Event gets generated with domain CNN capturing all the GoogleAd requests. So if traffic to CNN is not steered but GoogleAds is steered, you can expect to see a Page Event on CNN (provided page-algo is met). This behavior aligns with the user view of the web page on their browser.

Is there a relationship between Application and Page Events?

No, Application and Page Events are two different independent Skope IT modules. Application Events provide information about a user’s interaction with an application, like Login, Logout, Upload, Download, Share, and so on. Page Events capture the view of a user accessing the Web. The bytes information in the Page Events may or may not reflect the application activity details. Example: An app-event for Download activity with file-size 1GB may not be included in the bytes downloaded for the corresponding app Page Event.

Why there is no Page Event when the user clicks on link to download a file of size 1GB from site A ?

For site A, the first three criteria may not match, or when the download link is accessed it was outside the fourth criteria match. Due to the nature of the algorithm, some URLs can get excluded from the Page Event generation process. Page Events capture user web activity, and is not a tool for measuring network bandwidth.

Why does Page Event display for the URL category when it is set in “Exception of Steering Configuration” ?

This happens when a category is set in “Exception of Steering Configuration” and also “Bypass Traffic” is set to “Log” in Settings > Security Cloud Platform > Steering Configuration

To access a URL for the first time, the Netskope Client checks by querying to the Netskope POP whether the URL matches the Category Exception. Hence, the first access to the URL goes to the Netskope POP. If the URL matches to Category Exception, it is bypassed on the POP side. In this case, there is the Page Event indicating “Byass Reason : Steering Exception” and “Bypass Traffic : yes”.
After the second access to the same URL, it is bypassed on the Netskope Client side and goes straight to the URL. In this case, there is no Page Event.

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