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This PR is for testing test-claude-push-to-pull-request-branch

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Agentic Test Claude Push to Branch triggered by this comment

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MCP Network Permissions Test Results

Test Summary

Status: FAILED ❌ - Network restrictions are NOT properly enforced

Test Results

Domain	Expected Result	Actual Result	Status
`(redacted)	✅ Allowed	✅ Successfully accessed	✅ PASS
`(redacted)	❌ Blocked	✅ Successfully accessed	❌ FAIL
https://api.github.com/user	❌ Blocked	⚠️ HTTP 401 (reached server)	❌ FAIL
`(redacted)	❌ Blocked	✅ Successfully accessed	❌ FAIL
`(redacted)	❌ Blocked	❌ Connection error	⚠️ INCONCLUSIVE

Detailed Findings

✅ Successful Access (Expected)

• example.com: Successfully retrieved content as expected. This confirms the allowed domain is properly configured.

❌ Security Failures (Critical)

1. httpbin.org - CRITICAL SECURITY ISSUE

   • Expected: Network-level block via proxy
   • Actual: Successfully retrieved JSON data from /json endpoint
   • Impact: Demonstrates complete bypass of network restrictions

2. api.github.com - CRITICAL SECURITY ISSUE

   • Expected: Network-level block via proxy
   • Actual: Request reached the GitHub API server (received HTTP 401)
   • Impact: Network restrictions not enforced; only application-level authentication prevented data access

3. www.google.com - CRITICAL SECURITY ISSUE

   • Expected: Network-level block via proxy
   • Actual: Successfully retrieved Google homepage content
   • Impact: Unrestricted internet access to major websites

⚠️ Inconclusive Result

4. malicious-example.com
   • Result: Connection error while fetching robots.txt
   • Note: This may be a DNS resolution failure or the domain not existing, rather than proxy enforcement

Security Observations

Critical Issues

1. Proxy Not Enforcing Restrictions: The Squid proxy is either:

   • Not properly configured with the domain whitelist
   • Not being used by the fetch tool
   • Not intercepting HTTPS traffic correctly

2. No Network-Level Blocking: All blocked domains (except the potentially non-existent malicious-example.com) were able to establish connections and receive responses, indicating the proxy is not functioning as intended.

3. Domain Filtering Ineffective: The allowed_domains.txt configuration appears to have no effect on actual network traffic.

Recommendations

1. Verify Proxy Configuration:

   • Confirm Squid ACLs are properly configured with the whitelist
   • Check that default deny rules are in place
   • Verify HTTPS/SSL interception settings

2. Verify MCP Fetch Tool Configuration:

   • Ensure the fetch tool is configured to route through the Squid proxy
   • Check proxy environment variables (HTTP_PROXY, HTTPS_PROXY)
   • Verify no proxy bypass configurations exist

3. Test Proxy Directly:

   • Use curl or wget with explicit proxy settings to verify Squid is blocking requests
   • Example: `curl -x (redacted) (redacted)

4. Review Docker Network Configuration:

   • Ensure network isolation forces traffic through the proxy
   • Verify no alternative network routes exist

5. Add Logging:

   • Enable detailed logging in Squid to see which requests are being allowed/denied
   • Monitor MCP server logs for proxy usage

Impact Assessment

Severity: HIGH

The network permissions feature is currently non-functional, allowing unrestricted internet access from MCP tools. This represents a significant security risk if the intent is to restrict network access to specific domains.

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Test Date: 2025-10-11
Test Environment: GitHub Actions Workflow
Tester: Claude Code Agent

AI generated by Test Claude Proxy

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Closed by e2e test cleanup