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About GLAD:'s Anti-DDoS solution

This document will explain the following:

  • What is GLAD?
  • Explanation of the product and its features
  • Overview of product packages

What is GLAD?

GLAD (Global Low-Latency anti-DDoS protection) is a collection of in-house tools that we offer at, that can prevent, detect, and thwart a strike. It's important to understand what is meant by a "strike" and what strikes can do to disrupt services, and how our GLAD product can deter such attacks. For more information about how attacks work and how they can impact services, see DDoS attack types overview.

GLAD features / tools

Below is an explanation of our's GLAD's tooling and how each functionality can help to thwart DDoS attacks.

What's included in the Basic package

1. Default ACL (Access Control Lists) on VLAN

Preset Access Control Lists ( ACL ) rules that protect against diverse attack types, such as DNS (Domain Name System) and/or UDP attacks. The rules are consistently updated and maintained throughout to ensure ongoing security.

2. Automatic detection and auto null route

With automatic detection, it will discover incoming DDoS attacks. Once an attacker network is detected, this service blocks all traffic from it. Also, null routing silently discards (or "drops") malicious incoming traffic. The undesired traffic is directed to a route that goes nowhere, protecting the infrastructure. Null routing renders the target server inaccessible to anyone, including clean traffic.

What's included in the Advanced package:

(Advanced also includes the features from the Basic package above.)

1. Custom ACL (Access Control Lists) on VLAN

With this feature, you can preset their own ACL rules to protect against most of attack types. For example, they can set the specific ports, protocols, IP addresses that need to be protected from attacks.

2. Rate limit

If it is not certain if a network or IP is a risk, it can be set to receive a limited amount of traffic from a certain destination.

What's included in the Premium package:

(Premium also includes the features from the Advanced and Basic packages above.)

1. Warden

For unparalleled anti-DDoS protection, Warden is our custom software that filters traffic on a dynamic whitelist furnished by the customer. Its capabilities provide inline filtering, which allows you to achieve a higher level of specificity and detail when filtering their traffic stream.

In other words, only IPs explicitly listed in the whitelist can pass through. One of the key advantages of Warden is its ability to operate without introducing latency. By bypassing the operating system (OS) and directly receiving traffic through the network interface card (NIC), Warden offloads the filtering process from the OS, ensuring efficient and high-performance filtering.

Warden is designed to be flexible and adaptable. New features are continuously added whenever technically feasible, enabling you to benefit from the latest advancements in traffic filtering technology. In the event of server failures, Warden follows a fail-open system. If two servers fail, instead of blocking traffic, Warden allows all traffic to pass through. This ensures that your network remains operational even in challenging situations.

Warden also supports Active-Active setups, allowing horizontal scaling. This means you can expand the capacity of your filtering infrastructure by adding more instances of Warden, distributing the workload, and ensuring scalability.

Warden allows you to specify IPs (through API) to whitelist or blacklist at line rate speeds and takes effect within seconds of adding the IP to the specified lists.

2. Byte matching

Byte matching is a technique used to identify and filter out malicious or undesirable traffic from incoming network packets based on specific byte patterns. Customers can tailor specified signatures. As a result, it blocks the bytes that are not supposed to enter the network by taking appropriate actions to safeguard the targeted infrastructure.

3. API support

This feature allows you to be able to tailor their own protection as needed by managing protection profiles and white/black-lists through API.

Product packages overview

Below is an overview our product packages and what features are included.

Features Basic Advanced Premium
Default ACL on VLAN X X X
Automatic detection and auto null route X X X
Custom ACL on VLAN X X
Rate limit X X
Warden X
Byte matching X
API support X

Read more about how DDoS attacks can impact services.