In listener.c listen_init() calls rl_init() rl_init loops mainconfig.list mainconfig.list is generally 0x0 at that point, since mainconfig.c:1045 looks like this ----------------------- if (listen_init(buffer, &listener) < 0) { exit(1); } if (!listener) { radlog(L_ERR|L_CONS, "Server is not configured to listen on any ports. Exiting."); exit(1); } listen_free(&mainconfig.listen); mainconfig.listen = listener; ----------------------- later...... proxy.c:536 request->proxy_listener->send segv