Class SimpleDosDefender

Class that represents a simple DoS defender that will block addresses but not unblock them (until the application is restarted, since state is not persisted). This is helpful only with high connection attempt counts.

Inheritance
System.Object
SimpleDosDefender
Implements
Microsoft.Extensions.Hosting.IHostedService
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Fibula.Security
Assembly: Fibula.Security.dll
Syntax
public class SimpleDosDefender : IDoSDefender, IHostedService

Constructors

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SimpleDosDefender(IOptions<SimpleDosDefenderOptions>)

Initializes a new instance of the SimpleDosDefender class.

Declaration
public SimpleDosDefender(IOptions<SimpleDosDefenderOptions> options)
Parameters
Type Name Description
Microsoft.Extensions.Options.IOptions<SimpleDosDefenderOptions> options

The options for this defender.

Properties

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Options

Gets the options set for this defender.

Declaration
public SimpleDosDefenderOptions Options { get; }
Property Value
Type Description
SimpleDosDefenderOptions

Methods

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BlockAddress(String)

Blocks a given address.

Declaration
public void BlockAddress(string addressStr)
Parameters
Type Name Description
System.String addressStr

The address to block.
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IsBlocked(String)

Checks if a given address is blocked.

Declaration
public bool IsBlocked(string addressStr)
Parameters
Type Name Description
System.String addressStr

The address to check for.
Returns
Type Description
System.Boolean

True if the address is blocked, false otherwise.
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LogConnectionAttempt(String)

Logs a connection attempt.

Declaration
public void LogConnectionAttempt(string addressStr)
Parameters
Type Name Description
System.String addressStr

The address from which the connection attempt took place.
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StartAsync(CancellationToken)

Starts the defender service.

Declaration
public Task StartAsync(CancellationToken cancellationToken)
Parameters
Type Name Description
System.Threading.CancellationToken cancellationToken

A token to observe for cancellation.
Returns
Type Description
System.Threading.Tasks.Task

A System.Threading.Tasks.Task representing the result of the asynchronous operation.
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StopAsync(CancellationToken)

Stops the defender service.

Declaration
public Task StopAsync(CancellationToken cancellationToken)
Parameters
Type Name Description
System.Threading.CancellationToken cancellationToken

A token to observe for cancellation.
Returns
Type Description
System.Threading.Tasks.Task

A System.Threading.Tasks.Task representing the asynchronous operation.

Implements

Microsoft.Extensions.Hosting.IHostedService

Extension Methods