- Products
- Network Security
Next Generation FirewallNext-generation firewall for SMB, Enterprise, and Government
Security ServicesComprehensive security for your network security solution
Network Security ManagerModern Security Management for today’s security landscape
- Advanced Threat Protection
Capture ATPMulti-engine advanced threat detection
Capture Security applianceAdvanced Threat Protection for modern threat landscape
- Access Security
Cloud Edge Secure AccessDeploy Zero-Trust Security in minutes
Secure Mobile AccessRemote, best-in-class, secure access
Wireless Access PointsEasy to manage, fast and secure Wi-FI
SwitchesHigh-speed network switching for business connectivity
- Email Security
Email SecurityProtect against today’s advanced email threats
- Cloud Security
Cloud App SecurityVisibility and security for Cloud Apps
Cloud Firewall (NSv)Next-generation firewall capabilities in the cloud
- Endpoint Security
Capture ClientStop advanced threats and rollback the damage caused by malware
Content Filtering ClientControl access to unwanted and unsecure web content
- Product Widgets
- Product Menu Right Image
-
- Network Security
- Solutions
- Solutions Widgets
- Solutions Image Widgets
-
- Solutions Widgets
- Partners
- Partner Widgets
- Partners Image Widgets
-
- Partner Widgets
- Support
- Support Widget
- Support Image Widgets
-
- Support Widget
- Products
- Network Security
- Next Generation FirewallNext-generation firewall for SMB, Enterprise, and Government
- Security ServicesComprehensive security for your network security solution
- Network Security ManagerModern Security Management for today’s security landscape
- Advanced Threat Protection
- Capture ATPMulti-engine advanced threat detection
- Capture Security applianceAdvanced Threat Protection for modern threat landscape
- Access Security
- Cloud Edge Secure AccessDeploy Zero-Trust Security in minutes
- Secure Mobile AccessRemote, best-in-class, secure access
- Wireless Access PointsEasy to manage, fast and secure Wi-FI
- SwitchesHigh-speed network switching for business connectivity
- Email Security
- Email SecurityProtect against today’s advanced email threats
- Cloud Security
- Cloud App SecurityVisibility and security for Cloud Apps
- Cloud Firewall (NSv)Next-generation firewall capabilities in the cloud
- Endpoint Security
- Capture ClientStop advanced threats and rollback the damage caused by malware
- Content Filtering ClientControl access to unwanted and unsecure web content
- Product Widgets
- Product Menu Right Image
-
- Network Security
- Solutions
- Solutions Widgets
- Solutions Image Widgets
-
- Solutions Widgets
- Partners
- Partner Widgets
- Partners Image Widgets
-
- Partner Widgets
- Support
- Support Widget
- Support Image Widgets
-
- Support Widget
How to enable Denial of Service attack protection in the Email Security?
03/26/2020 
1,042 People found this article helpful
98,551 Views
Description
What is a Denial of Service (DoS) Attack?
An assault on a network that floods it with so many additional requests that regular traffic is either slowed or completely interrupted.
Resolution
To enable Denial of Service attack protection in the Email Security,
1. Please log in to the user interface as an admin user.
2. Navigate to Manage | Security Services | Connection Management and click the checkbox which says Enable DoS protection under Denial of Service (DoS) attack protection.
The Denial of Service attack protection can be triggered on receiving 10 to 7000 (can be configured by the user) connections from any given IP address in a single day. We can either defer future connections from the same IP address for different time intervals (1 hour to 1 year) or block future connections from the same IP address.
Specify the settings:
Trigger -- Specify the number of connections to allow from a given IP address.
Action to take -- Specify either to defer future connections from that IP address for a set amount of time or to block all future connections from that IP address permanently.
3. Please click Apply changes after you enable the Denial of Service Attack protection.
NOTE: Please don't turn on the DoS protection if you are not running email security as a first touch server.
NOTE: If the navigation or the screenshot looks different from the one mentioned above , you may be in an older firmware version and would require a firmware upgrade. Please refer the link below to upgrade the firmware to latest version.
https://www.sonicwall.com/en-us/support/knowledge-base/170504270079039
Related Articles
- SonicWall HES IP address blocklisted by UCEProtect or Backscatter
- How to add O365 connector for domain specific routing
- SonicWall Email Security on Hyper-V Platform
Categories
- Email Security > Email Security Appliance
- Email Security > Email Security Software
- Email Security > Hosted Email Security
YES
NO