Update to use correct Caddy network address format: - network/address instead of address/network - udp/:5060 instead of :5060/udp - Remove invalid tls subdirective from proxy handler
Layer 4 SIP protection with: - SIP traffic matching (REGISTER, INVITE, etc.) - Rate limiting and automatic IP banning - Attack pattern detection (sipvicious, friendly-scanner) - CIDR whitelisting - Admin API for ban management