caddy-sip-guardian/sandbox/Caddyfile

# Sandbox Caddyfile for SIP Guardian Testing
#
# This configuration showcases all the new features:
# - Prometheus metrics endpoint
# - Rate limiting per method (built-in defaults)
# - Suspicious pattern detection
#
# Note: Storage and webhooks are configured in JSON config mode,
# as the L4 handler uses the shared global guardian instance

{
	debug

	admin 0.0.0.0:2019

	layer4 {
		# SIP over UDP
		udp/:5060 {
			@sip sip {
				methods REGISTER INVITE OPTIONS ACK BYE CANCEL INFO NOTIFY SUBSCRIBE MESSAGE
			}

			route @sip {
				sip_guardian {
					max_failures 3          # Lower for faster testing
					find_time 2m            # Shorter window
					ban_time 5m             # Short bans for testing

					# Whitelist legitimate test clients
					whitelist 10.55.0.50/32  # client container
					whitelist 10.55.0.51/32  # linphone container

					# Enumeration detection (low thresholds for testing)
					enumeration {
						max_extensions 10
						extension_window 2m
						sequential_threshold 5
						rapid_fire_count 8
						rapid_fire_window 10s
						ban_time 10m
						exempt_extensions 100 200
					}
				}
				proxy udp/{$SIP_UPSTREAM_HOST}:{$SIP_UPSTREAM_PORT}
			}

			# Unmatched traffic - drop silently
			route {
			}
		}

		# SIP over TCP
		tcp/:5060 {
			@sip sip

			route @sip {
				sip_guardian {
					max_failures 3
					find_time 2m
					ban_time 5m
					whitelist 10.55.0.50/32
					whitelist 10.55.0.51/32
				}
				proxy tcp/{$SIP_UPSTREAM_HOST}:{$SIP_UPSTREAM_PORT}
			}
		}

		# SIP over TLS
		tcp/:5061 {
			@sip sip

			route @sip {
				sip_guardian {
					max_failures 3
					find_time 2m
					ban_time 5m
					whitelist 10.55.0.50/32
					whitelist 10.55.0.51/32
				}
				proxy tcp/{$SIP_UPSTREAM_HOST}:{$SIP_UPSTREAM_TLS_PORT}
			}
		}
	}
}

# Admin API and Metrics
:2020 {
	# SIP Guardian admin endpoints
	handle /api/sip-guardian/* {
		sip_guardian_admin
	}

	# Prometheus metrics endpoint
	handle /metrics {
		sip_guardian_metrics
	}

	# Health check
	handle /health {
		respond "OK" 200
	}

	# Stats (alias for backwards compatibility)
	handle /stats {
		sip_guardian_admin
	}
}