How do you analyze Azure logs?
Log Analytics is a tool in the Azure portal to edit and run log queries from data collected by Azure Monitor logs and interactively analyze their results. You can use Log Analytics queries to retrieve records that match particular criteria, identify trends, analyze patterns, and provide various insights into your data.
Azure Monitor enables you to track diagnostic information including WAF alerts and logs. You can configure WAF monitoring within the Front Door resource in the portal under the Diagnostics tab, through infrastructure as code approaches, or by using the Azure Monitor service directly.
Azure Monitor Logs is based on Azure Data Explorer, and log queries are written using the same Kusto query language (KQL). This is a rich language designed to be easy to read and author, so you should be able to start writing queries with some basic guidance.
Navigate to the Application Gateway resource. On the resource, to the left scroll to Monitoring and select Logs. Select Get Started. By default, the Queries screen appears.
Logging. WAF Uses Amazon Kinesis Firehose to ingest logs. This allows logs to be passed to any Kinesis Firehose destination, such as Amazon S3, Amazon Redshift or Amazon Elastic Search. To enable logging of requests in your Web ACL, you must first create a Kinesis Data Firehose. Here is an example WAF log of a request.
Some data types, including Azure Activity Logs, are free from data ingestion charges. Data ingested as Basic Logs (see below) are not billed as analytics Pay-As-You-Go or against a Commitment Tier.
The logging query language processing is based on a data flow model. Each query can reference one or more logs, and produces a table dataset as a result. The query language provides several operators for searching, filtering, and aggregating structured and unstructured logs.
"Log Analytics" is referred as a feature and not what used to be known as Log Analytics as a product. For instance, Application Insights resources provide the same "Log Analytics" feature. For Azure Functions / APIM the native integration with Azure Monitor is through Application Insights.
- Open the AWS WAF console.
- In the navigation pane, choose Web ACLs.
- For Filter, choose the Region where your web ACL was created.
- Choose the relevant web ACL from the resulting list, and then choose Logging.
- Choose Enable Logging.
- In the navigation pane, choose Metrics.
- Choose the EC2 metric namespace.
- Select a metric dimension (for example, Per-Instance Metrics).
- To sort the metrics, use the column heading. To graph a metric, select the check box next to the metric.
What is WAF and how it works?
A WAF protects your web apps by filtering, monitoring, and blocking any malicious HTTP/S traffic traveling to the web application, and prevents any unauthorized data from leaving the app. It does this by adhering to a set of policies that help determine what traffic is malicious and what traffic is safe.
Its a bit like the relationship of Office to Word, Excel etc... Monitor is the brand, and Log Analytics is one of the solutions. Log Analytics and Application Insights have been consolidated into Azure Monitor to provide a single integrated experience for monitoring Azure resources and hybrid environments.
The diagnostics logs are saved in a blob container named $logs in your storage account. You can view the log data using a storage explorer like the Microsoft Azure Storage Explorer, or programmatically using the storage client library or PowerShell.
KQL Tutorial Series | Straight Basics | EP1 - YouTube
Browse to an application gateway, under Monitoring select Metrics. To view the available values, select the METRIC drop-down list. To see a current list of metrics, see Supported metrics with Azure Monitor.
With Azure diagnostic logs, you can view core analytics and save them into one or more destinations including: Azure Storage account. Log Analytics workspace. Azure Event Hubs.
In the Azure portal, go to your resource and select Workbooks. In the Activity Logs Insights section, select Activity Logs Insights.
Navigate to the ADVANCED > Export Logs page. In the Export Logs section, click Export Log Settings. The Export Log Settings window opens. In the Syslog Settings section, select the appropriate facility (Local0 to Local7) from the drop-down list for each log type and click Save.
Log analysis is the process of reviewing computer-generated event logs to proactively identify bugs, security threats, factors affecting system or application performance, or other risks. Log analysis can also be used more broadly to ensure compliance with regulations or review user behavior.
Report | Azure AD Free | Azure AD Premium P2 |
---|---|---|
Audit logs | Seven days | 30 days |
Sign-ins | Seven days | 30 days |
Azure AD MFA usage | 30 days | 30 days |
How long is data stored in Log Analytics?
By default Application Insights and Log Analytics has a data retention of 90 days. You can opt to extend the retention up to 730 days.
Resource logs were previously referred to as diagnostic logs. Activity log. Azure Subscription. Provides insight into the operations on each Azure resource in the subscription from the outside (the management plane) in addition to updates on Service Health events.
- Write a new query.
- Sort and top.
- The where operator: filtering on a condition.
- Specify a time range.
- Use project and extend to select and compute columns.
- Use summarize to aggregate groups of rows.
- Next steps.
- Go to the Log Analytics workspaces menu in the Azure portal and select Tables (preview). ...
- Specify a name for the table. ...
- Click Create a new data collection rule to create the DCR that will be used to send data to this table. ...
- Select the data collection endpoint that you created and click Next.
Azure Monitor builds on top of Log Analytics, the platform service that gathers log and metrics data from all your resources. The easiest way to think about it is that Azure Monitor is the marketing name, whereas Log Analytics is the technology that powers it.
...
Azure Monitor Logs connector.
Category | Limit | Comments |
---|---|---|
Max size of data | ~16.7 MB (~16 MiB) | The connector infrastructure dictates that limit is set lower than query API limit |
Max number of records | 500,000 | |
Max connector timeout | 110 second | |
Max query timeout | 100 second |
Difference between Azure Monitor and Application Insights
Azure monitor can collect the data from variety of the sources like application, guest OS azure resources and tenants. Azure Application Insights is meant for collection the application data only.
A web application firewall (WAF) is a firewall that monitors, filters and blocks data packets as they travel to and from a website or web application. A WAF can be either network-based, host-based or cloud-based and is often deployed through a reverse proxy and placed in front of one or more websites or applications.
Logging is available in all AWS WAF regions and for each supported service, including Amazon CloudFront, Application Load Balancer, Amazon API Gateway, and AWS AppSync.
To view data for the rules in a web ACL
Sign in to the AWS Management Console and open the CloudWatch console at https://console.aws.amazon.com/cloudwatch/ . In the navigation pane, under Metrics, choose WAF. Select the check box for the web ACL that you want to view data for.
What is the difference between logs and metrics?
While logs are about a specific event, metrics are a measurement at a point in time for the system. This unit of measure can have the value, timestamp, and identifier of what that value applies to (like a source or a tag).
To view log data
Open the CloudWatch console at https://console.aws.amazon.com/cloudwatch/ . In the navigation pane, choose Log groups. For Log Groups, choose the log group to view the streams. In the list of log groups, choose the name of the log group that you want to view.
The INSUFFICIENT_DATA state can indicate any of the following: An Amazon CloudWatch alarm just started. The metric is unavailable. The metric parameters, like namespace, metric name, or dimensions, have been misconfigured. There's not enough data for the metric to determine the alarm state.
Azure WAF is a web application firewall that helps protect your web applications from common threats such as SQL injection, cross-site scripting, and other web exploits. You can define a WAF policy consisting of a combination of custom and managed rules to control access to your web applications.
There are three types of WAFs available on the market. They all accomplish the same goal but are installed and deployed in different locations. Because of this, the three types differ in cost, maintenance required, and speed.
A WAF protects web applications by targeting Hypertext Transfer Protocol (HTTP) traffic. This differs from a standard firewall, which provides a barrier between external and internal network traffic. A WAF sits between external users and web applications to analyze all HTTP communication.
Browse to an application gateway, under Monitoring select Metrics. To view the available values, select the METRIC drop-down list. To see a current list of metrics, see Supported metrics with Azure Monitor.
- Open the AWS WAF console.
- In the navigation pane, choose Web ACLs.
- For Filter, choose the Region where your web ACL was created.
- Choose the relevant web ACL from the resulting list, and then choose Logging.
- Choose Enable Logging.
In the Azure portal, go to your resource and select Workbooks. In the Activity Logs Insights section, select Activity Logs Insights.
With Azure diagnostic logs, you can view core analytics and save them into one or more destinations including: Azure Storage account. Log Analytics workspace. Azure Event Hubs.
What is Azure monitor metrics?
Azure Monitor Metrics is a feature of Azure Monitor that collects numeric data from monitored resources into a time-series database. Metrics are numerical values that are collected at regular intervals and describe some aspect of a system at a particular time.