Merge pull request #231233 from vhorne/sec-end-end

add firewall basic

Author: prmerger-automator[bot]

articles/security/fundamentals/end-to-end.md

@@ -55,7 +55,7 @@ The [Microsoft cloud security benchmark](/security/benchmark/azure/introduction)
 | [VPN Gateway](../../vpn-gateway/vpn-gateway-about-vpngateways.md) | A virtual network gateway that is used to send encrypted traffic between an Azure virtual network and an on-premises location over the public Internet and to send encrypted traffic between Azure virtual networks over the Microsoft network. |
 | [Azure DDoS Protection](../../ddos-protection/ddos-protection-overview.md) | Provides enhanced DDoS mitigation features to defend against DDoS attacks. It is automatically tuned to help protect your specific Azure resources in a virtual network. |
 | [Azure Front Door](../../frontdoor/front-door-overview.md) | A global, scalable entry-point that uses the Microsoft global edge network to create fast, secure, and widely scalable web applications. |
-| [Azure Firewall](../../firewall/overview.md) | A cloud-native and intelligent network firewall security service that provides threat protection for your cloud workloads running in Azure. It's a fully stateful firewall as a service with built-in high availability and unrestricted cloud scalability. Azure Firewall is offered in two SKUs: [Standard](../../firewall/features.md) and [Premium](../../firewall/premium-features.md). |
+| [Azure Firewall](../../firewall/overview.md) | A cloud-native and intelligent network firewall security service that provides threat protection for your cloud workloads running in Azure. It's a fully stateful firewall as a service with built-in high availability and unrestricted cloud scalability. Azure Firewall is offered in three SKUs: [Standard](../../firewall/features.md), [Premium](../../firewall/premium-features.md), and [Basic](../../firewall/overview.md#azure-firewall-basic). |
 | [Azure Key Vault](../../key-vault/general/overview.md) | A secure secrets store for tokens, passwords, certificates, API keys, and other secrets. Key Vault can also be used to create and control the encryption keys used to encrypt your data. |
 | [Key Vault Managed HSM](../../key-vault/managed-hsm/overview.md) | A fully managed, highly available, single-tenant, standards-compliant cloud service that enables you to safeguard cryptographic keys for your cloud applications, using FIPS 140-2 Level 3 validated HSMs. |
 | [Azure Private Link](../../private-link/private-link-overview.md) | Enables you to access Azure PaaS Services (for example, Azure Storage and SQL Database) and Azure hosted customer-owned/partner services over a private endpoint in your virtual network. |