Azure Sentinel: Creating Custom Connectors (2023)

This blog post is now part of the official Azure Sentinel documentation, and updated there.
This blog post is obsolete.

Before you go the custom connector way

Want to include your custom connector in Azure Sentinel? contant us.

If the Sentinel data connectors page does not include the source you need, you may still not need a custom connector. Review the following blog posts for additional sources that can be used with Sentinel without a custom connector:

  • Azure Sentinel Agent: Collecting telemetry from on-prem and IaaS server
  • Collecting logs from Microsoft Services and Applications
  • Syslog, CEF, Logstash, and other 3rd party connectors grand list

If you still can't find your source in any of those, custom connectors are the solution.

Importantly, the options described below can be used to ingest vent data and import context and enrichment data such as threat intelligence, user or asset information.

Using the Log Analytics Agent

Custom file collection

The Log Analytics agent can collect events stored in files. This is the easiest way to collect events from any source that delivers events in files. See collecting Custom logs in Azure Monitor.


The most direct way to create a custom connector is to use the Log Analytics agent. The Log Analytics agent is based on Fluentd and can use any Fluentd input pluginbundled with the agent to collect events and then forward them to an Azure Sentinel workspace. You can find an example of how to do that in the documentation.

Note that the agent can do this alongside its other collection roles as described here.

Using Fluentd or Fluent Bit

If the agent is not flexible enough, you may want to consider using Fluentd or Fluent Bit, its lighter sibling, directly:

Using Logstash

An alternative to using the Log Analytics agent and Fluentd plugins is using Logstash. It is architecturally similar, but if you know Logstash, this might be your best bet. To do so, use the Logstash output plugin for Sentinel,which enables you to use Azure Sentinel as the output for a Logstash pipeline. Now you can use all your GROK prowess and any Logstash input plugin to implement your connector.

See, for example,Collecting AWS CloudWatchusing Logstash.

To scale Logstash, you may want to use a load-balanced Logstash VM scale set as described here, or a container cluster: read about doing this here.

Using Logic Apps

A serverless alternative eliminates the need to maintain VMs and uses Logic Apps to get events or context data to Sentinel. To do that, build a playbook with the following elements:

  • Use one of these triggers to start the playbook:
    1. Recurring task- schedule the connector, for example, for retrieving data from files, databases, or external APIs.
    2. On-demand triggering- for manual upload and testing​​​​​​.
    3. HTTP/S endpoint- if the source system can initiate the transfer and for streaming.
  • Read the data using one of the following connectors:​​​​​​
    1. Using a REST API
    2. Read SQL Server data.
    3. Read a file
    4. Note that those connectors support retrieving dataon-premises.
  • Prepare the information, for example, using theParse JSON action.
  • Write the data to Log Analytics using theLogic Apps connector for writing data to Log Analytics.

There are many examples out there for doing so:

Note that while convenient, this method may be costly for large volumes of data and should be used only for low volume sources or for context and enrichment data upload.

The PowerShell cmdlet

TheUpload-AzMonitorLog PowerShell scriptenables you to use PowerShell to stream events or context information to Sentinel from the command line.For example, this command will upload a CSV file to Sentinel:

Import-Csv .\testcsv.csv
| .\Upload-AzMonitorLog.ps1
-WorkspaceId '69f7ec3e-cae3-458d-b4ea-6975385-6e426'
-WorkspaceKey $WSKey
-LogTypeName 'MyNewCSV'
-AdditionalDataTaggingName "MyAdditionalField"
-AdditionalDataTaggingValue "Foo"

The script takes the following parameters:

  • WorkspaceId - The Workspace ID of the workspace that would be used to store this data
  • WorkspaceKey - The primary or secondary key of the workspace that would be used to store this data. It can be obtained from the Windows Server tab in the workspace Advanced Settings.
  • LogTypeName - The name of the custom log table that would store these logs. This name will be automatically concatenated with "_CL."
  • AddComputerName - If this switch is indicated, the script will add to every log record a field called Computer with the current computer name
  • TaggedAzureResourceId - If exists, the script will associate all uploaded log records with the specified Azure resource. This will enable these log records for resource-context queries as well as adhere to resource-centric role-based access control.
  • AdditionalDataTaggingName - If exists, the script will add to every log record an additional field with this name and the value that appears in AdditionalDataTaggingValue. This happens only if AdditionalDataTaggingValue is not empty.
  • AdditionalDataTaggingValue - If exist, the script will add to every log record an additional field with this value. The field name would be as specified in AdditionalDataTaggingName. If AdditionalDataTaggingName is empty, the field name will be "DataTagging."

The Data Collection API

All the methods above use the Log Analytics Data Collector APIto stream events to Azure Sentinel.You can use the API directly to ingest any data to Sentinel. While it would require programming, it naturally offers the most flexibility.

To use the API, you can directly call the RESTful endpoint using C#, Python 2, Java, PowerShell, or any other language, or utilize the availableclient libraries.You can find an end to end example for a C# based connector here.

Azure Functions

Naturally, you need to run your API code somewhere. In traditional on-premises computing, this requires a server to run the connector and challenges it brings with it: monitoring, management, patching, etc.

Using Azure Functions to implement a connector using the API connector is especially valuable as it keeps the connector serverless. You can use any language, including PowerShell, to implement the function. To get started with implementing a custom connector using Azure Functions, refer to the C# example in the documentation or the real-world implementation:


Therefore, the API and all the other options described above allow defining the fields that will be populated in Azure Sentinel. Use your connector parsing technique to extract relevant information from the source and populate it in designated fields, for example,grok in Logstash and Fluentd parsers in the Log Analytics agent.

However, Sentinel allows parsing at query time, which offers much more flexibility and simplifies the import process. Query time allows you to push data in at the original format and parse on demand when needed. Updating a parser will apply to already ingested data.

Query time parsing reduces the overhead of creating a custom connector as the data's exact structure does not have to be known beforehand. Nor do you need to identify the vital information to extract. Parsing can be implemented at any stage, even during an investigation, to extract a piece of information Adhoc and will apply to already ingested data.

JSON, XML, and CSV are especially convenient as Sentinel has built-in parsing functions for those and a UI tool to build a JSON parser as described in the blog postTip: Easily use JSON fields in Sentinel.

To ensure parsers are easy to use and transparent to analysts, they can be saved as functions and be used instead of Sentinel tables in any query, including hunting and detection queries. Read more about query time function parsersand the available KQL operators for parsinghere.

Azure Sentinel: Creating Custom Connectors (1)


How many custom connectors can be created in Azure subscription? ›

API and OpenAPI
Azure Logic AppsLimit
Number of custom connectors that you can create1,000 per Azure subscription
Number of requests per minute for each connection created by a custom connector500 requests for each connection created by the connector
Maximum schema count per body allowed in a Swagger file512
4 more rows
Feb 24, 2023

How do I Create a custom data connector in Sentinel? ›

Find your workspace ID and key
  1. In Microsoft Sentinel, select Settings on the left, and then select the Workspace settings tab.
  2. Under Get started with Log Analytics > 1 Connect a data source, select Windows and Linux agents management.
  3. Find your workspace ID, primary key, and secondary key on the Windows servers tabs.
Mar 7, 2023

What is required to build a custom connector? ›

In this article
  • Prerequisites.
  • Start the custom connector wizard.
  • Step 1: Update general details.
  • Step 2: Specify authentication type.
  • Step 3: Create the connector definition.
  • Step 4: (Optional) Use custom code support.
  • Step 5: Test the connector.
  • (For CLI users) Best practices.
Apr 28, 2023

Which of following approaches can be used for creating custom connectors? ›

The following approaches are supported:
  • An OpenAPI definition (formerly known as a Swagger file) Create a custom connector from an OpenAPI definition. ...
  • A Postman collection. Create a Postman collection. ...
  • Start from scratch using the custom connector portal (Power Automate and Power Apps only)
Jan 10, 2023

How many custom roles can be created per Azure AD? ›

Custom roles are stored in an Azure Active Directory (Azure AD) directory and can be shared across subscriptions. Each directory can have up to 5000 custom roles.

How many custom roles can be created in Azure AD? ›

Just like built-in roles, you can assign custom roles to users, groups, and service principals at management group (in preview only), subscription, and resource group scopes. Custom roles can be shared between subscriptions that trust the same Azure AD tenant. There is a limit of 5,000 custom roles per tenant.

How do I Create a custom connector in Azure? ›

All you need to do is navigate to the Custom Connectors page under Data on the sidebar. Click + New custom connector and select Create from Azure Service (Preview). Next, give your connector a name, select your Azure subscription, choose the Azure service, and then select your app.

How do I add a custom connector to a solution? ›

Select the Solutions tab. Create a new solution or open an existing unmanaged solution. Select New > Automation > Custom connector. A new tab opens, where you create a new custom connector.

How do I publish a custom connector? ›

To make a custom connector publicly available for all users in Logic Apps, Power Automate, and Power Apps, submit your connector to Microsoft for certification. Microsoft will review the connector and, if it meets certification criteria, approve it for publishing.

Is Custom connector premium? ›

Hi @sharepointer1 All custom connectors require a premium license.

What is the criteria to select the connector? ›

These include current and voltage, but additional requirements such as RFI, EMI, shielding, signal speed, separation of power and signals, and grounding may also be considered. The number of contacts within the connector also needs to be specified.

What three connector features should you consider when selecting a connector? ›

The most important criteria for you will determine the type and size of electrical connectors. Other factors you need to consider here include operating voltage, wire size, configuration, bonding force, and circuit size.

Which two operations can you use for connectors? ›

Each connector offers a set of operations classified as actions and triggers.

What is the best way to determine which custom connectors have been deployed in an organization's tenant? ›

What is the best way to determine which custom connectors have been deployed in an organization's tenant? Run the Get-AdminPowerAppConnector PowerShell cmdlet.

Which two features require you to deploy a connector? ›

When you use BlueXP in standard mode, a Connector is required for the following features and services in BlueXP:
  • Amazon FSx for ONTAP management features.
  • Amazon S3 discovery.
  • Azure Blob discovery.
  • Backup and recovery.
  • Classification.
  • Cloud Volumes ONTAP.
  • E-Series systems.
  • Economic efficiency.
Apr 21, 2023

What is the limit of custom domains in Azure? ›

Limit is 500" message on our Azure function. Is there a way to increase that limit? A feature of Azure App Service used to create and deploy scalable, mission-critical web apps.

How many roles can be assigned to a single user? ›

In addition to creating multiple user roles, administrators can assign up to ten roles to a single user.

What is the maximum length of custom attributes in Azure AD? ›

Limits and constraints
Attribute description length128Unicode characters
Predefined valuesUnicode characters and case sensitive
Predefined values per attribute definition100
Attribute value length64Unicode characters
9 more rows
Mar 15, 2023

Can a user have multiple IAM roles? ›

Technically, you can assume multiple IAM roles at the same time but the permissions will not be aggregated. Assuming an IAM role doesn't change who you are or what permissions you have.

Can we assign multiple roles to a user? ›

You can assign more than one role to a user. However, some restrictions apply when multiple roles are assigned to a user. When a user is assigned multiple roles, the permissions that a user has is the combined permissions of all the roles that the user has.

What is the difference between Azure roles and Azure AD roles? ›

Differences between Azure roles and Azure AD roles

At a high level, Azure roles control permissions to manage Azure resources, while Azure AD roles control permissions to manage Azure Active Directory resources.

What is custom connector in Azure? ›

What is a Custom Connector? A custom connector, in Azure Logic Apps, is an abstraction that sits on top of a REST or SOAP API and has an Open API (formerly known as Swagger) contract that allows developers to easily 'plug-in' their connector to Azure Logic Apps.

Are custom connectors supported in instant flows only? ›

Custom connectors are supported in instant flows only. A company plans to create Power Platform apps that consume industry-standard and proprietary data sources. Standard and custom connectors cannot be mixed within the same flow or app.

What is the process to create a connector using rest connect? ›

What is the process to create a connector using REST connect? Design the API in Design Center and publish the API to exchange.

How do you use environment variables in custom connector? ›

Use an environment variable in a custom connector
  1. Sign in to Power Apps or Power Automate.
  2. From the list, select a solution. ...
  3. From the list, select the newly created or existing solution.
  4. Select Environment variables.
  5. Select New > More > Environment variable.
Apr 20, 2023

How do I add a connector to an existing flow? ›

The way you create a new connection for an action is by selecting the + Add new connection from the action menu. Once you've authenticated with the connection service, you can then use it in your Flow.

How do I add connections to existing flow? ›

Open a flow. Scroll to the bottom of the Connections panel on the left and select Add Connection to display the Add Connection dialog. Select a Connection from the drop-down list or select Create a New Connection. Select OK to add the Connection to the flow.

How do I add text to connector? ›

  1. Double-click the connector. ...
  2. Enter your text in the text box. ...
  3. To move your text, click the yellow handle. ...
  4. To rotate the text box, select Home, in the Tools group, select Text Block , select the text box, and then drag the rotation handle .

How do I create a custom connector from Postman collection? ›

Go to or In the navigation pane, select Data > Custom connectors. Choose New custom connector, then choose Import a Postman collection. Enter a name for the custom connector, then navigate to the Postman collection that you downloaded or created, and choose Continue.

What is the difference between standard and premium connectors? ›

Power Apps and Power Automate have native access to two types of connectors: standard and premium. Apps or flows that only use standard connectors may be authored or executed by any user, apps or flows that use premium connectors may only be authored or executed by those with a premium license.

What are the disadvantages of Dataverse? ›

The biggest disadvantage of Dataverse is that it's impossible to build complex views that traverse multiple tables. For example, joining three or four related tables with inner/outer join types is not possible, particularly if we want to group or to aggregate data.

Does E5 license include premium connectors? ›

Office 365 – E1, E3, E5, G1, G3, G5 come with standard PowerApps/Power Automate licensing does not including premium connectors.

What are the 3 types of connectors to choose? ›

Electrical connectors are classified into three types based on their termination ends: board-to-board connectors, cable/wire-to-cable/wire connectors, and cable/wire-to-board connectors.

What are the 6 main types of connectors? ›

There are 6 main types of connectors that link a computer (graphics card) to a monitor.
  • USB-C (Apple Thunderbolt-3) Connection. ...
  • HDMI V 1.2 and V 1.3 Connection. ...
  • DisplayPort Connection. ...
  • DVI Connector. ...
  • Mini DVI Connector. ...
  • VGA Connector.

What are the rules for connectors? ›

Connectors are placed between two statements they are to connect. They can be placed before or after the subject of the second sentence. If the connector is the first word in the second sentence, it must be followed by a comma.

What are the basic requirements of good connector design? ›

Some principal requirements of good connector design are as follows:
  • Coupling loss. The connector assembly must maintain stringent alignment tolerances to ensure low mating losses. ...
  • Interchangeability. ...
  • Ease of assembly. ...
  • Low environmental sensitivity. ...
  • Low cost and reliable construction. ...
  • Ease of connection.

What are the four types of connectors? ›

Here are four industrial electrical plug types:
  • Threaded connection. Some types of connections are commonly used for contacts with larger dimensions and the military electrical connector that operate in high vibration environments. ...
  • Bayonet connection. ...
  • In-line connector. ...
  • Electrical connector cabinet connection.

What are the factors that affect the choice of connectors? ›

Connector is the full name of a component used for wiring and electrification. Its plugging performance is mainly affected by factors such as surface state, contact material, positive pressure, current and operating voltage.

What are Azure connectors? ›

When you build a workflow using Azure Logic Apps, you can use a connector to work with data, events, and resources in other apps, services, systems, and platforms - without writing code. A connector provides one or more prebuilt operations, which you use as steps in your workflow.

What are two of the connectors most commonly used in computing? ›

There are two types of USB connectors, namely Type A, that connects to the USB port of a PC, and Type B, that connects peripheral devices to a PC. Type A is highly standardized, while Type B can be different sizes.

What are the authentication type supported when creating custom connector? ›

The different types of authentication that are currently supported are:
  • No authentication.
  • Basic authentication.
  • Api Key based authentication.
  • Oauth 2.0.
Jan 4, 2023

What is the default behavior for custom connectors with respect to DLP policies? ›

By default, the pattern is set as Ignore for new DLP policies. Ignore ignores DLP classification for all connectors in this tenant-level policy, and defers evaluation of a pattern to other environments or tenant-level policies to attribute them into the Business, Non-Business, or Blocked grouping as appropriate.

Which of these could be used to create a custom connector in power? ›

Sign in to Power Apps or Power Automate. On the left pane, select Data > Custom connectors. Select New custom connector > Create from blank. Enter a name for the custom connector, and then select Continue.

Can you have 2 Azure AD Connect servers? ›

Having more than one Azure AD Connect sync server connected to a single Azure AD tenant is not supported. The exception is the use of a staging server. This topology differs from the one below in that multiple sync servers connected to a single Azure AD tenant is not supported.

How many connection limits does Azure Web app have? ›

Bandwidth165 MBUnlimited, data transfer rates apply
Application architecture32-bit32-bit
Web sockets per instance7535
Outbound IP connections per instance600600
29 more rows

What is the maximum concurrent connections for Azure Web app? ›

For Azure Web PubSub the Concurrent Connections per Unit is 1,000 and the Max Units is 100 that means the instance max number of Concurrent Connections per Unit is (100*1000=100000).

What are the limits of Azure logic app SQL connector? ›

Workflow definition limits
Single action - Maximum combined inputs and outputs size209,715,200 bytes (210 MB)
Expression character limit8,192 characters
description - Maximum length256 characters
parameters - Maximum number of items50 parameters
10 more rows
Apr 19, 2023

How many instances of Azure AD Connect are needed? ›

Azure AD Connect supports syncing from multiple forests. It supports only one instance of Azure AD Connect syncing to Azure AD. In cases where Azure AD is already installed in one forest, the existing instance of Azure AD Connect must be updated to sync from the other forest.

Can single tenant have multiple Azure subscriptions? ›

When it comes to your specific scenario - Tenant 1: Production and Tenant 2: Development , you'll need one subscription per tenant, since an Azure Subscription can only have a one to one (1:1) relationship with an Azure AD Tenant.

Can two Azure subscriptions be merged into a single subscription? ›

Here are some key takeaways about Azure subscriptions. The first one is, you need an Azure Active Directory account to manage a subscription. Second, there can only be one account administrator. Third, you can't merge two subscriptions into a single subscription.

What is the maximum number of connections for webserver? ›

On the TCP level the tuple (source ip, source port, destination ip, destination port) must be unique for each simultaneous connection. That means a single client cannot open more than 65535 simultaneous connections to a single server. But a server can (theoretically) serve 65535 simultaneous connections per client.

What is the maximum number of simultaneous client connections Web server can handle? ›

For all the requests it gets, it establishes a new socket. And since there are only 65535 TCP ports, it means that a server cannot have more than that amount of concurrent connections .

How many connection limits are there in web server? ›

Most modern browsers allow six connections per domain. Most older browsers allow only two connections per domain. The HTTP 1.1 protocol states that single-user clients should not maintain more than two connections with any server or proxy.

What is limit concurrency in Azure? ›

The limit-concurrency policy prevents enclosed policies from executing by more than the specified number of requests at any time. When that number is exceeded, new requests will fail immediately with the 429 Too Many Requests status code.

What is the maximum number of devices per user in Azure? ›

You can configure the maximum allowed devices per user in MEM Intune and Azure Active Directory. You might get the following error “The maximum number of devices that can be joined to the workplace by the user has been reached.” The default value of the maximum number of devices per user in Azure AD is 50 devices.

What is the Internet limit in Azure? ›

Flow limits and active connections recommendations

Today, the Azure networking stack supports 1M total flows (500k inbound and 500k outbound) for a VM.

What is the maximum connection limit in SQL? ›

SQL Server allows a maximum of 32,767 user connections.

What are the 3 types of connectors available in Azure logic app? ›

In Azure Logic Apps, connectors are available in either a built-in version, managed version, or both.

What are the connection limits for Azure Synapse? ›

Azure Synapse limits for workspaces
ResourceDefault limitMaximum limit
Synapse workspaces in an Azure subscription per region20100


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