Pulse/internal/api
rcourtman 1b221cca71 feat: Add configurable allowlist for webhook private IP targets (addresses #673)
Allow homelab users to send webhooks to internal services while maintaining security defaults.

Changes:
- Add webhookAllowedPrivateCIDRs field to SystemSettings (persistent config)
- Implement CIDR parsing and validation in NotificationManager
- Convert ValidateWebhookURL to instance method to access allowlist
- Add UI controls in System Settings for configuring trusted CIDR ranges
- Maintain strict security by default (block all private IPs)
- Keep localhost, link-local, and cloud metadata services blocked regardless of allowlist
- Re-validate on both config save and webhook delivery (DNS rebinding protection)
- Add comprehensive tests for CIDR parsing and IP matching

Backend:
- UpdateAllowedPrivateCIDRs() parses comma-separated CIDRs with validation
- Support for bare IPs (auto-converts to /32 or /128)
- Thread-safe allowlist updates with RWMutex
- Logging when allowlist is updated or used
- Validation errors prevent invalid CIDRs from being saved

Frontend:
- New "Webhook Security" section in System Settings
- Input field with examples and helpful placeholder text
- Real-time unsaved changes tracking
- Loads and saves allowlist via system settings API

Security:
- Default behavior unchanged (all private IPs blocked)
- Explicit opt-in required via configuration
- Localhost (127/8) always blocked
- Link-local (169.254/16) always blocked
- Cloud metadata services always blocked
- DNS resolution checked at both save and send time

Testing:
- Tests for CIDR parsing (valid/invalid inputs)
- Tests for IP allowlist matching
- Tests for bare IP address handling
- Tests for security boundaries (localhost, link-local remain blocked)

Related to #673

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-09 08:31:12 +00:00
..
alerts.go Implement Pulse tag overrides and alert clear persistence 2025-10-25 14:28:32 +00:00
alerts_test.go Allow printable alert IDs for acknowledgements (#550) 2025-10-14 16:48:22 +00:00
auth.go Refactor: Code cleanup and localStorage consolidation 2025-11-04 21:50:46 +00:00
auth_scope_test.go Add API token scopes and standalone host agent 2025-10-23 11:40:31 +00:00
bootstrap_token.go Improve bootstrap token UX for easier discovery 2025-11-06 17:29:49 +00:00
config_handlers.go Fix storage/disk/backup disappearing for clusters with VerifySSL enabled 2025-11-08 23:07:49 +00:00
config_handlers_auto_register_test.go Harden setup token flow and enforce encrypted persistence 2025-10-25 16:00:37 +00:00
config_handlers_cluster_test.go Respect custom ports when discovering Proxmox clusters 2025-10-22 17:42:52 +00:00
config_handlers_setup_script_test.go Refactor: Code cleanup and localStorage consolidation 2025-11-04 21:50:46 +00:00
csrf_store.go Fix critical P0 security and crash issues in API/WebSocket layer 2025-11-07 10:13:15 +00:00
demo_middleware.go Fix demo mode to allow authentication endpoints 2025-11-06 13:48:28 +00:00
diagnostics.go Fix guest agent disk data regression on Proxmox 8.3+ 2025-11-06 18:42:46 +00:00
DO_NOT_EDIT_FRONTEND_HERE.md Fix settings security tab navigation 2025-10-11 23:29:47 +00:00
docker_agents.go Add custom display name support for Docker hosts 2025-11-05 23:18:03 +00:00
docker_metadata.go Consolidate pending changes 2025-10-28 23:20:44 +00:00
frontend_embed.go Improve static asset caching for hashed files 2025-11-06 13:54:26 +00:00
guest_metadata.go Fix settings security tab navigation 2025-10-11 23:29:47 +00:00
host_agents.go Improve host agent onboarding flow 2025-10-25 09:37:29 +00:00
host_agents_test.go perf: reduce polling allocations and guest metadata load 2025-10-25 13:12:47 +00:00
http_metrics.go feat: comprehensive diagnostics and observability improvements 2025-10-21 12:37:39 +00:00
middleware.go feat: comprehensive diagnostics and observability improvements 2025-10-21 12:37:39 +00:00
notification_queue.go Add comprehensive alert system reliability improvements 2025-11-06 16:46:30 +00:00
notifications.go feat: Add configurable allowlist for webhook private IP targets (addresses #673) 2025-11-09 08:31:12 +00:00
oidc_handlers.go Fix settings security tab navigation 2025-10-11 23:29:47 +00:00
oidc_service.go Fix P1: Resource leaks in Recovery Tokens, Rate Limiter, and OIDC Service 2025-11-07 10:18:44 +00:00
rate_limit_config.go Add comprehensive release validation to prevent missing artifacts 2025-11-06 16:33:49 +00:00
rate_limit_config_test.go test: add X-RateLimit-Limit header regression test 2025-10-20 15:10:59 +00:00
ratelimit.go Fix P1: Resource leaks in Recovery Tokens, Rate Limiter, and OIDC Service 2025-11-07 10:18:44 +00:00
README.md Fix settings security tab navigation 2025-10-11 23:29:47 +00:00
recovery_tokens.go Fix P1: Resource leaks in Recovery Tokens, Rate Limiter, and OIDC Service 2025-11-07 10:18:44 +00:00
router.go feat: Add configurable allowlist for webhook private IP targets (addresses #673) 2025-11-09 08:31:12 +00:00
router_integration_test.go Refactor: Code cleanup and localStorage consolidation 2025-11-04 21:50:46 +00:00
security.go Fix CSRF token validation and improve token management 2025-11-05 09:23:44 +00:00
security_oidc.go feat: add professional logging with runtime configuration and performance optimization 2025-10-20 15:13:38 +00:00
security_setup_fix.go Improve bootstrap token UX for easier discovery 2025-11-06 17:29:49 +00:00
security_setup_fix_test.go Refactor: Code cleanup and localStorage consolidation 2025-11-04 21:50:46 +00:00
security_test.go Refactor: Code cleanup and localStorage consolidation 2025-11-04 21:50:46 +00:00
security_tokens.go Refactor: Code cleanup and localStorage consolidation 2025-11-04 21:50:46 +00:00
security_tokens_test.go Add API token scopes and standalone host agent 2025-10-23 11:40:31 +00:00
session_store.go Fix P1/P2 infrastructure issues: panic recovery and optimizations 2025-11-07 09:55:22 +00:00
system_settings.go feat: Add configurable allowlist for webhook private IP targets (addresses #673) 2025-11-09 08:31:12 +00:00
types.go Add per-node temperature monitoring and fix critical config update bug 2025-11-05 14:11:53 +00:00
updates.go Fix settings security tab navigation 2025-10-11 23:29:47 +00:00

Internal API Package

This directory contains the API server implementation for Pulse.

Important Note About frontend-modern/

The frontend-modern/ subdirectory that appears here is:

  • AUTO-GENERATED during builds
  • NOT the source code - just a build artifact
  • IN .gitignore - never committed
  • REQUIRED BY GO - The embed directive needs it here

Frontend Development Location

👉 Edit frontend files at: /opt/pulse/frontend-modern/src/

Why This Structure?

Go's //go:embed directive has limitations:

  1. Cannot use ../ paths to access parent directories
  2. Cannot follow symbolic links
  3. Must embed files within the Go module

This is a known Go limitation and our structure works around it.