Hi, CMUCL & rtoy CMUCL's networking API do not have standalone BIND function. And it's EXT:CONNECT-TO-INET-SOCKET and EXT:CREATE-INET-SOCKET function do not have any LOCAL-HOST/LOCAL-PORT argument. So a client socket is IMPOSSIBLE to bind to specific local host/port when CONNECT to remote address. I wrote a loadable CMUCL patch, which create a new function BIND-INET- SOCKET, and add LOCAL-HOST, LOCAL-PORT keyword arguments to above two functions to support this feature. I think it's quite safe to merge it in next CMUCL version. Please review it. Regards, Chun Tian (binghe)