What measures should be configured to mitigate unauthorized access attempts from a Tor exit node to a key vault?

To mitigate unauthorized access attempts from a Tor exit node to a key vault, configuring Key Vault firewalls and virtual networks is crucial. This approach enhances security by controlling the network traffic that is allowed to reach the key vault. By setting up a firewall, you can specify IP address ranges that are permitted to access the key vault, effectively blocking requests from any IP addresses associated with Tor exit nodes.

In conjunction with these firewalls, utilizing virtual networks can further restrict access to your key vault resources, permitting only traffic from your specified virtual networks. This means that any unauthorized access attempts, such as those originating from anonymous or untrusted sources like Tor nodes, will be denied entry, thereby protecting your sensitive information stored within the key vault.

While access policy settings, Azure AD permissions, and role-based access control (RBAC) are important for defining who can access what within Azure services, they do not directly address the network-level threats posed by Tor or similar anonymous access networks. Therefore, implementing firewalls and virtual networks provides an essential layer of defense against such unauthorized access.