Bullfrog vs network firewalls
An allowed domain is not a data boundary.
AI agents need shared services like GitHub and package registries to do useful work. But allowing a service does not restrict which account they send data to or which operations they perform. An attacker can target a service your agent already uses.
Bullfrog applies your policy to the request, not just its destination. This comparison isolates IP/domain rules, not firewalls with their own L7 inspection.
How they differ
IP/domain filtering
Allow github.com and both requests get through, including the one to the attacker’s repository.
github.comBullfrog request policy
With a policy allowing only your organization, the attacker’s request stops at Bullfrog.
github.comFeature comparison
| Feature | IP/domain rules | Bullfrog |
|---|---|---|
| Destination restrictions | Allow or block destination IPs or domains | Restrict destinations and apply request policy |
| Accounts and repositories within a service | Same address, no account distinction | Match supported request paths and fields to approved accounts |
| Read versus write operations | Same address, no operation distinction | Allow useful reads and restrict writes with configured rules |
| Remote MCP tool calls | Shared endpoint, no tool-call distinction | Match tool names and arguments in supported remote MCP requests |
What this means in practice
Same service. Different account.
With IP/domain rules
Your organization’s repository and an attacker’s repository can share github.com. Allowing the domain permits access to both. Address rules alone cannot decide which repository may receive your data.
With Bullfrog
Configure request rules that allow writes to your approved organization and block writes elsewhere. Agents retain useful access to the service without permission to send data to every account on it.
Allow useful reads. Block unauthorized writes.
With IP/domain rules
Downloading a dependency and publishing a package can use the same registry. The destination address does not tell you whether the agent is reading public data or uploading your code.
With Bullfrog
Use request methods, paths and supported fields to distinguish operations. For example, allow package downloads while blocking publishing requests. These are configured service rules, not automatic classification of sensitive data.
One MCP endpoint. Different tools.
With IP/domain rules
Remote MCP tools can share one HTTPS endpoint. Allowing that endpoint does not distinguish a read-only tool from a tool that creates an issue or sends data to another account.
With Bullfrog
Match tool names and arguments in supported remote MCP requests. A configured policy can permit read tools while blocking create_issue or restricting its target repository. This applies to remote MCP traffic, not local stdio tool calls.
Bullfrog complements network controls: keep destination restrictions and add request-level boundaries. Coverage depends on supported tools, TLS stacks, protocols, configured policy and enforcement mode.
Contact us at info@bullfrogsec.com