国外有同样问题的出现者，，但无给出具体解决方法，我认为与兼容性有关。
Shark@Lau /home/dummynet/ipfw3-2012/binary$ ./ipfw.exe -h 0 [main] ipfw 15148 find_fast_cwd: WARNING: Couldn’t compute FAST_CWD poin ter. Please report this problem tothe public mailing list cygwin@cygwin.comipfw syntax summary (but please do read the ipfw(8) manpage): ipfw [-abcdefhnNqStTv] <command>where <command> is one of the following:add [num] [set N] [prob x] RULE-BODY{pipe|queue} N config PIPE-BODY[pipe|queue] {zero|delete|show} [N{,N}]nat N config {ip IPADDR|if IFNAME|log|deny_in|same_ports|unreg_only|reset| reverse|proxy_only|redirect_addr linkspec| redirect_port linkspec|redirect_proto linkspec}set [disable N… enable N…] | move [rule] X to Y | swap X Y | showset N {show|list|zero|resetlog|delete} [N{,N}] | flushtable N {add ip[/bits] [value] | delete ip[/bits] | flush | list}table all {flush | list}RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]ACTION: check-state | allow | count | deny | unreach{,6} CODE | skipto N | {divert|tee} PORT | forward ADDR | pipe N | queue N | nat N | setfib FIB | reassPARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]ADDR: [ MAC dst src ether_type ] [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ] [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }IP6LIST: { ip6 | ip6/bits }[,IP6LIST]IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]OPTION_LIST: OPTION [OPTION_LIST]OPTION: bridged | diverted | diverted-loopback | diverted-output | {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR | {dst-port|src-port} LIST | estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST | iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC | ipttl LIST | ipversion VER | keep-state | layer2 | limit … | icmp6types LIST | ext6hdr LIST | flow-id N[,N] | fib FIB | mac … | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} | setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC | tcpdatalen LIST | verrevpath | versrcreach | antispoofShark@Lau /home/dummynet/ipfw3-2012/binary$ ./ipfw -f flush 0 [main] ipfw 11424 find_fast_cwd: WARNING: Couldn’t compute FAST_CWD poin ter. Please report this problem tothe public mailing list cygwin@cygwin.comipfw: socket: No errormy_socket failed 2, cannot talk to kernel module
具体解决方法即将给出。
有了你，我不再作孤飞于蓝天的雄鹰，
