Amaindex enhanced the SagerNet/gvisor repository by implementing promiscuous-mode ICMPv4 Echo handling with temporary address support. This work involved extending the NetworkPacketInfo structure to include LocalAddressTemporary, enabling the system to recognize and process ICMPv4 Echo requests sent to temporary addresses. By adjusting the defaultHandler, Amaindex allowed custom promiscuous-mode processors to independently handle ICMP traffic, bypassing default echo replies and supporting advanced traffic analysis scenarios. The feature was developed in Go, leveraging skills in network programming, protocol implementation, and system programming. The contribution demonstrated focused depth in protocol handling and improved flexibility for specialized network monitoring use cases.