GcpConceptBeginner · 3 min read

What is Cloud Armor in GCP: Overview and Usage

Cloud Armor in Google Cloud Platform (GCP) is a security service that protects your applications from internet threats like attacks and unwanted traffic. It works by filtering and blocking harmful requests before they reach your services using customizable security rules.

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How It Works

Imagine Cloud Armor as a security guard standing at the entrance of your building. It checks every visitor (internet request) and decides if they are allowed in or not based on rules you set. These rules can block bad visitors like hackers or bots trying to cause trouble.

Cloud Armor uses a list of conditions like IP addresses, geographic locations, or request patterns to filter traffic. It works with Google’s global network to stop attacks early, so your applications stay safe and fast.

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Example

This example shows how to create a simple Cloud Armor security policy that blocks traffic from a specific IP address.

bash

gcloud compute security-policies create my-security-policy --description "Block bad IP"
gcloud compute security-policies rules create 1000 --security-policy my-security-policy --expression "origin.ip == '203.0.113.1'" --action deny-403 --description "Block IP 203.0.113.1"

Output

Created [https://www.googleapis.com/compute/v1/projects/PROJECT_ID/global/securityPolicies/my-security-policy]. Created rule 1000 in security policy [my-security-policy].

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When to Use

Use Cloud Armor when you want to protect your websites or applications from attacks like DDoS (flooding your site with traffic) or unauthorized access. It is helpful for businesses that need to keep their online services available and secure.

For example, if you run an online store, Cloud Armor can block suspicious traffic from countries you don’t serve or stop bots trying to scrape your prices. It also helps meet security rules required by some industries.

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Key Points

Cloud Armor protects applications by filtering harmful internet traffic.
You create rules to allow or block traffic based on IP, geography, or request details.
It integrates with Google’s global network for fast and reliable protection.
Commonly used to defend against DDoS attacks and unauthorized access.

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Key Takeaways

Cloud Armor filters and blocks harmful internet traffic to protect your apps.

You set custom rules based on IPs, locations, and request patterns.

It helps prevent attacks like DDoS and unauthorized access.

Cloud Armor works globally with Google’s network for fast defense.