[security-observability] Daily Security Observability Report — 2026-05-29

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Executive Summary

The daily security observability report for 2026-05-29 covers 41 firewall-enabled workflow runs across the github/gh-aw repository. The firewall intercepted 684 blocked requests out of 3,146 total (21.7% block rate) against 10 unique blocked domain identifiers. The largest category of blocks — 579 requests — are classified as (unknown), indicating traffic from browser automation or embedded runtimes whose domain names could not be resolved. Google-related domains account for most identified blocks, consistent with Playwright browser automation workflows inadvertently triggering auto-fill, telemetry, and safe-browsing endpoints. No DIFC integrity-filtered events were recorded in this period, indicating clean data-flow integrity across all agent sessions.

The firewall is operating as expected: legitimate AI inference traffic (api.githubcopilot.com) and telemetry (sentry.io) are consistently allowed, while browser automation side-effects and localhost proxy artifacts are correctly blocked. The high block rate from (unknown) domains warrants investigation to improve domain attribution in firewall logs.

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🔥 Firewall Analysis

Key Firewall Metrics

Metric	Value
Workflows analyzed (firewall-enabled)	41
Total network requests monitored	3,146
✅ Allowed requests	2,462
🚫 Blocked requests	684
Block rate	21.7%
Total unique blocked domains	10

📈 Firewall Request Trends

All 3,146 monitored requests occurred on 2026-05-29, reflecting a single-day snapshot within the 7-day analysis window. The firewall allowed 78.3% of traffic while blocking 21.7%, a pattern consistent with Playwright-heavy workflows generating substantial browser automation side-channel traffic. No anomalous traffic spikes were detected.

Top Blocked Domains

The majority of blocked traffic (84.6% of blocks) is attributed to (unknown) — domain names that the firewall could not resolve, most likely originating from browser-internal requests or pre-DNS traffic from Playwright containers. Google services (auto-fill, safe-browsing, accounts, android clients) account for the remaining identified blocks, which are expected side effects of browser automation workflows that do not require direct Google network access.

Most Frequently Blocked Domains

Domain	Times Blocked	Category
(unknown)	579	Unresolved / browser-internal
content-autofill.googleapis.com:443	20	Google auto-fill (browser side effect)
localhost:8080	18	Local proxy / internal traffic
www.google.com:443	17	Google web (browser side effect)
accounts.google.com:443	13	Google auth (browser side effect)
api-proxy:10002	12	Internal proxy port
android.clients.google.com:443	8	Android client (browser side effect)
api-proxy:10000	8	Internal proxy port
safebrowsingohttpgateway.googleapis.com:443	7	Google Safe Browsing
clients2.google.com	2	Google client services

View Detailed Request Patterns by Workflow

Workflow	Allowed	Blocked	Block Rate
PR Sous Chef	602	159	20.9%
Agent Persona Explorer	184	71	27.8%
CLI Consistency Checker	252	62	19.7%
Package Specification Librarian	176	58	24.8%
Delight	130	40	23.5%
Smoke Claude	78	37	32.2%
UK AI Operational Resilience	121	32	20.9%
Smoke Codex	78	31	28.4%
Outcome Collector	95	28	22.8%
Daily Agent of the Day Blog Writer	96	27	22.0%
Daily SPDD Spec Planner	80	28	25.9%
Breaking Change Checker	31	8	20.5%
Smoke CI	12	0	0.0%

View Complete Blocked Domains List

• (unknown)
• accounts.google.com:443
• android.clients.google.com:443
• api-proxy:10000
• api-proxy:10002
• clients2.google.com
• content-autofill.googleapis.com:443
• localhost:8080
• safebrowsingohttpgateway.googleapis.com:443
• www.google.com:443

🔒 Firewall Security Recommendations

1. Investigate (unknown) domain attribution: 579 requests (84.6% of all blocks) lack domain names. Improve firewall logging to capture pre-DNS or IP-direct traffic from Playwright containers, enabling better attribution and threat assessment.
2. Review localhost:8080 blocks: 18 requests targeting localhost suggest some workflows may be attempting to reach local services that are not available. Verify whether these are intentional proxy calls or misconfigured MCP server endpoints.
3. Review api-proxy:10002 and api-proxy:10000 blocks: Internal proxy ports being blocked may indicate misconfigured network policies. Ensure these are not legitimate MCP gateway traffic that should be allowed.
4. Browser automation workflows: Workflows using Playwright (Agent Persona Explorer, PR Sous Chef, Delight) generate the highest block counts due to browser-internal Google service requests. Consider adding explicit network allowlists for expected Playwright traffic or blocking at the container level before reaching the firewall.
5. Smoke Claude/Codex block rates: Both smoke workflows show block rates >28%, which may indicate test scenarios exercising network-restricted tools. Verify that smoke test assertions are not dependent on blocked domains.

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🔒 DIFC Integrity Analysis

Key DIFC Metrics

Metric	Value
Total filtered events	0
Unique tools filtered	0
Unique workflows affected	0
Most common filter reason	N/A
Busiest day	N/A

✅ No DIFC integrity-filtered events were recorded in the last 7 days. The Data Integrity and Flow Control system did not block any tool calls, indicating that all agent interactions respected declared information flow boundaries.

📈 DIFC Events Over Time

No events recorded. The absence of DIFC filtering activity is a positive security signal: agents are operating within their declared tool boundaries and not attempting to access resources outside their permitted scope.

🔧 Top Filtered Tools

No tool filtering events in the last 7 days.

🏷️ Filter Reasons and Tags

No integrity or secrecy tag violations in the last 7 days.

📋 Per-Workflow DIFC Breakdown

No DIFC-filtered events to report.

�� Per-Server DIFC Breakdown

No DIFC-filtered events to report.

👤 Per-User DIFC Breakdown

No DIFC-filtered events to report.

💡 DIFC Tuning Recommendations

1. Baseline is healthy: Zero filtering events for 7 days indicates DIFC policies are well-calibrated and agents are not attempting out-of-scope operations.
2. Continue monitoring: As new workflows and tools are added (especially those with bypassPermissions mode), re-evaluate DIFC tag coverage to ensure new information flows are properly labeled.
3. Proactive tag review: Periodically audit MCP server tool definitions for missing integrity or secrecy tags to maintain complete coverage before violations occur.

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Generated by the Daily Security Observability workflow (consolidated from Daily Firewall Reporter + Daily DIFC Analyzer)
Analysis window: Last 7 days | Repository: github/gh-aw
Run: §26650665311

Generated by 🔒 Daily Security Observability Report · sonnet46 2.7M · ◷

• expires on Jun 1, 2026, 5:33 PM UTC

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