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单口NAT问题，抄cico官方配置，却不通？在线等......
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  whelks 离线
  1. 单口NAT问题，抄cico官方配置，却不通？在线等......
HP : 0 / 116
MP : 15 / 1262
EXP : 67%
江湖小虾


成员等级: 5
发表总数: 47
金币总数: 95
所属组别: 普通成员
注册日期: 2005/04/30

 今天拿了台1721的路由做试验，想做一下单口的NAT，具体配置如下：

Building configuration...

Current configuration : 1258 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname aaa
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$i7CQ$DYvP.0tX9oMaQKav.H5Q1.
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
ip cef
!
!
!
no ip domain lookup
no ftp-server write-enable
!
!
!
!
interface Loopback0
ip address 10.0.1.1 255.255.255.252
ip nat outside
!
interface Ethernet0
ip address 192.168.66.88 255.255.255.0 secondary
ip address 10.0.0.2 255.255.255.0
ip nat inside
ip policy route-map nat-loop
half-duplex
!
interface FastEthernet0
no ip address
shutdown
speed auto
!
ip nat pool external 192.168.66.5 192.168.66.6 prefix-length 30
ip nat inside source list 10 pool external overload
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.66.66
no ip http server
!
access-list 10 permit 10.0.0.0 0.0.0.255
access-list 102 permit ip any 192.168.66.4 0.0.0.3
access-list 102 permit ip 10.0.0.0 0.0.0.255 any
access-list 177 permit icmp any any
access-list 177 permit icmp any any log
route-map nat-loop permit 10
match ip address 102
set ip next-hop 10.0.1.2
!
!
line con 0
line aux 0
line vty 0 4
password cisco
login
!
!
end

aaa#

Connection to host lost.
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
在路由器上看 nat转换时，可以看的到转换的条目：
aaa#show ip nat translations
Pro Inside global Inside local Outside local Outside global
udp 192.168.66.6:1214 10.0.0.112:1214 202.96.128.68:53 202.96.128.68:53
udp 192.168.66.6:1214 10.0.0.112:1214 202.96.128.143:53 202.96.128.143:53
icmp 192.168.66.6:768 10.0.0.112:768 202.96.128.143:768 202.96.128.143:768
udp 192.168.66.6:3 10.0.0.112:138 10.0.0.255:138 10.0.0.255:138
aaa#
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

可是在下面的电脑上却是ping不通的，为什么？？？

极度郁闷，，，难道路由有问题？还是我的配置哪有问题？　　请指点，，，


accept , challenge , brightness
发表于2006/03/6, 13:54
      Top
  whelks 离线
2. Re:单口NAT问题，抄cico官方配置，却不通？在线等.........
HP : 0 / 116
MP : 15 / 1262
EXP : 67%
江湖小虾


成员等级: 5
发表总数: 47
金币总数: 95
所属组别: 普通成员
注册日期: 2005/04/30

 下面是我debug的输出：
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
User Access Verification

Password:
aaa>en
Password:
aaa#show
aaa#de
aaa#deb
aaa#debug ip pac
aaa#debug ip packet
IP packet debugging is on
aaa#ter
aaa#terminal mi
aaa#terminal min
aaa#terminal mino
aaa#terminal m
aaa#terminal moo
aaa#terminal mo
aaa#terminal mon
aaa#terminal monitor
aaa#
*Mar 1 00:31:45.999: IP: s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0), len 63, se
nding
*Mar 1 00:31:46.143: IP: tableid=0, s=10.0.0.5 (Ethernet0), d=10.0.0.2 (Etherne
t0), routed via RIB
*Mar 1 00:31:46.143: IP: s=10.0.0.5 (Ethernet0), d=10.0.0.2 (Ethernet0), len 40
, rcvd 3
*Mar 1 00:31:46.239: IP: tableid=0, s=10.0.0.5 (Ethernet0), d=10.255.255.255 (E
thernet0), routed via FIB
*Mar 1 00:31:46.239: IP: tableid=0, s=10.0.0.5 (Ethernet0), d=10.0.0.2 (Etherne
t0), routed via RIB
*Mar 1 00:31:46.243: IP: s=10.0.0.5 (Ethernet0), d=10.0.0.2 (Ethernet0), len 42
, rcvd 3
*Mar 1 00:31:46.243: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:46.243: IP: s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0), len 42, se
nding
*Mar 1 00:31:46.259: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:46.579: IP: tableid=0, s=192.168.66.154 (Ethernet0), d=192.168.66.
255 (Ethernet0), routed via RIB
*Mar 1 00:31:46.579: IP: s=192.168.66.154 (Ethernet0), d=192.168.66.255 (Ethern
et0), len 202, rcvd 3
*Mar 1 00:31:46.579: IP: tableid=0, s=192.168.66.154 (Ethernet0), d=192.168.66.
255 (Ethernet0), routed via RIB
*Mar 1 00:31:46.579: IP: s=192.168.66.154 (Ethernet0), d=192.168.66.255 (Ethern
et0), len 78, rcvd 3
*Mar 1 00:31:47.095: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:47.099: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:47.327: IP: tableid=0, s=192.168.66.154 (Ethernet0), d=192.168.66.
255 (Ethernet0), routed via RIB
*Mar 1 00:31:47.327: IP: s=192.168.66.154 (Ethernet0), d=192.168.66.255 (Ethern
et0), len 78, rcvd 3
*Mar 1 00:31:47.863: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.143 (Loopback
0), g=10.0.1.2, len 70, forward
*Mar 1 00:31:47.863: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.68 (Loopback0
), g=10.0.1.2, len 70, forward
*Mar 1 00:31:47.863: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.14
3 (Ethernet0), routed via FIB
*Mar 1 00:31:47.867: IP: s=192.168.66.6 (Loopback0), d=202.96.128.143 (Ethernet
0), g=192.168.66.66, len 70, forward
*Mar 1 00:31:47.867: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.68
(Ethernet0), routed via FIB
*Mar 1 00:31:47.867: IP: s=192.168.66.6 (Loopback0), d=202.96.128.68 (Ethernet0
), g=192.168.66.66, len 70, forward
*Mar 1 00:31:47.871: IP: tableid=0, s=202.96.128.143 (Ethernet0), d=192.168.66.
6 (Ethernet0), routed via RIB
*Mar 1 00:31:47.871: IP: s=202.96.128.143 (Ethernet0), d=192.168.66.6 (Ethernet
0), len 335, rcvd 3
*Mar 1 00:31:47.875: IP: tableid=0, s=10.0.0.2 (local), d=202.96.128.143 (Ether
net0), routed via FIB
*Mar 1 00:31:47.875: IP: s=10.0.0.2 (local), d=202.96.128.143 (Ethernet0), len
56, sending
*Mar 1 00:31:47.875: IP: tableid=0, s=202.96.128.68 (Ethernet0), d=192.168.66.6
(Ethernet0), routed via RIB
*Mar 1 00:31:47.875: IP: s=202.96.128.68 (Ethernet0), d=192.168.66.6 (Ethernet0
), len 303, rcvd 3
*Mar 1 00:31:48.079: IP: tableid=0, s=192.168.66.154 (Ethernet0), d=192.168.66.
255 (Ethernet0), routed via RIB
*Mar 1 00:31:48.079: IP: s=192.168.66.154 (Ethernet0), d=192.168.66.255 (Ethern
et0), len 78, rcvd 3
*Mar 1 00:31:48.115: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:48.123: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:48.135: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:48.139: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:48.523: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.68 (Loopback0
), g=10.0.1.2, len 56, forward
*Mar 1 00:31:48.523: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.68
(Ethernet0), routed via FIB
*Mar 1 00:31:48.527: IP: s=192.168.66.6 (Loopback0), d=202.96.128.68 (Ethernet0
), g=192.168.66.66, len 56, forward
*Mar 1 00:31:48.531: IP: tableid=0, s=202.96.128.68 (Ethernet0), d=192.168.66.6
(Ethernet0), routed via RIB
*Mar 1 00:31:48.531: IP: s=202.96.128.68 (Ethernet0), d=192.168.66.6 (Ethernet0
), len 131, rcvd 3
*Mar 1 00:31:48.535: IP: tableid=0, s=10.0.0.2 (local), d=202.96.128.68 (Ethern
et0), routed via FIB
*Mar 1 00:31:48.535: IP: s=10.0.0.2 (local), d=202.96.128.68 (Ethernet0), len 5
6, sending
*Mar 1 00:31:49.155: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:49.163: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:49.167: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:49.171: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.143 (Loopback
0), g=10.0.1.2, len 60, forward
*Mar 1 00:31:49.171: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.14
3 (Ethernet0), routed via FIB
*Mar 1 00:31:49.171: IP: s=192.168.66.6 (Loopback0), d=202.96.128.143 (Ethernet
0), g=192.168.66.66, len 60, forward
*Mar 1 00:31:49.179: IP: tableid=0, s=202.96.128.143 (Ethernet0), d=192.168.66.
6 (Ethernet0), routed via RIB
*Mar 1 00:31:49.179: IP: s=202.96.128.143 (Ethernet0), d=192.168.66.6 (Ethernet
0), len 60, rcvd 3
*Mar 1 00:31:49.519: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.68 (Loopback0
), g=10.0.1.2, len 56, forward
*Mar 1 00:31:49.519: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.68
(Ethernet0), routed via FIB
*Mar 1 00:31:49.519: IP: s=192.168.66.6 (Loopback0), d=202.96.128.68 (Ethernet0
), g=192.168.66.66, len 56, forward
*Mar 1 00:31:49.527: IP: tableid=0, s=202.96.128.68 (Ethernet0), d=192.168.66.6
(Ethernet0), routed via RIB
*Mar 1 00:31:49.527: IP: s=202.96.128.68 (Ethernet0), d=192.168.66.6 (Ethernet0
), len 131, rcvd 3
*Mar 1 00:31:49.527: IP: tableid=0, s=10.0.0.2 (local), d=202.96.128.68 (Ethern
et0), routed via FIB
*Mar 1 00:31:49.527: IP: s=10.0.0.2 (local), d=202.96.128.68 (Ethernet0), len 5
6, sending
*Mar 1 00:31:50.187: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:50.195: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:50.207: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:50.211: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:50.519: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.68 (Loopback0
), g=10.0.1.2, len 56, forward
*Mar 1 00:31:50.519: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.68
(Ethernet0), routed via FIB
*Mar 1 00:31:50.519: IP: s=192.168.66.6 (Loopback0), d=202.96.128.68 (Ethernet0
), g=192.168.66.66, len 56, forward
*Mar 1 00:31:50.527: IP: tableid=0, s=202.96.128.68 (Ethernet0), d=192.168.66.6
(Ethernet0), routed via RIB
*Mar 1 00:31:50.527: IP: s=202.96.128.68 (Ethernet0), d=192.168.66.6 (Ethernet0
), len 131, rcvd 3
*Mar 1 00:31:50.527: IP: tableid=0, s=10.0.0.2 (local), d=202.96.128.68 (Ethern
et0), routed via FIB
*Mar 1 00:31:50.527: IP: s=10.0.0.2 (local), d=202.96.128.68 (Ethernet0), len 5
6, sending
*Mar 1 00:31:51.227: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:51.227: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:52.247: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:52.255: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:52.347: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.112 (Ethernet0
), routed via RIB
*Mar 1 00:31:52.347: IP: s=10.0.0.2 (local), d=10.0.0.112 (Ethernet0), len 40,
sending
*Mar 1 00:31:52.347: IP: s=10.0.0.2 (local), d=10.0.0.112 (Ethernet0), len 40,
encapsulation failed
*Mar 1 00:31:52.519: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.68 (Loopback0
), g=10.0.1.2, len 56, forward
*Mar 1 00:31:52.519: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.68
(Ethernet0), routed via FIB
*Mar 1 00:31:52.519: IP: s=192.168.66.6 (Loopback0), d=202.96.128.68 (Ethernet0
), g=192.168.66.66, len 56, forward
*Mar 1 00:31:52.527: IP: tableid=0, s=202.96.128.68 (Ethernet0), d=192.168.66.6
(Ethernet0), routed via RIB
*Mar 1 00:31:52.527: IP: s=202.96.128.68 (Ethernet0), d=192.168.66.6 (Ethernet0
), len 131, rcvd 3
*Mar 1 00:31:52.527: IP: tableid=0, s=10.0.0.2 (local), d=202.96.128.68 (Ethern
et0), routed via FIB
*Mar 1 00:31:52.527: IP: s=10.0.0.2 (local), d=202.96.128.68 (Ethernet0), len 5
6, sending
*Mar 1 00:31:53.271: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:53.271: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:54.291: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:54.295: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:54.659: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.143 (Loopback
0), g=10.0.1.2, len 60, forward
*Mar 1 00:31:54.659: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.14
3 (Ethernet0), routed via FIB
*Mar 1 00:31:54.659: IP: s=192.168.66.6 (Loopback0), d=202.96.128.143 (Ethernet
0), g=192.168.66.66, len 60, forward
*Mar 1 00:31:54.671: IP: tableid=0, s=202.96.128.143 (Ethernet0), d=192.168.66.
6 (Ethernet0), routed via RIB
*Mar 1 00:31:54.671: IP: s=202.96.128.143 (Ethernet0), d=192.168.66.6 (Ethernet
0), len 60, rcvd 3
*Mar 1 00:31:55.311: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:55.311: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:56.327: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:56.519: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.68 (Loopback0
), g=10.0.1.2, len 56, forward
*Mar 1 00:31:56.519: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.68
(Ethernet0), routed via FIB
*Mar 1 00:31:56.519: IP: s=192.168.66.6 (Loopback0), d=202.96.128.68 (Ethernet0
), g=192.168.66.66, len 56, forward
*Mar 1 00:31:56.527: IP: tableid=0, s=202.96.128.68 (Ethernet0), d=192.168.66.6
(Ethernet0), routed via RIB
*Mar 1 00:31:56.527: IP: s=202.96.128.68 (Ethernet0), d=192.168.66.6 (Ethernet0
), len 131, rcvd 3
*Mar 1 00:31:56.527: IP: tableid=0, s=10.0.0.2 (local), d=202.96.128.68 (Ethern
et0), routed via FIB
*Mar 1 00:31:56.527: IP: s=10.0.0.2 (local), d=202.96.128.68 (Ethernet0), len 5
6, sending
*Mar 1 00:31:57.343: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:57.343: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:58.359: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:31:59.371: IP: tableid=0, s=10.0.0.2 (local), d=10.0.0.5 (Ethernet0),
routed via FIB
*Mar 1 00:32:00.159: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.143 (Loopback
0), g=10.0.1.2, len 60, forward
*Mar 1 00:32:00.159: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.14
3 (Ethernet0), routed via FIB
*Mar 1 00:32:00.159: IP: s=192.168.66.6 (Loopback0), d=202.96.128.143 (Ethernet
0), g=192.168.66.66, len 60, forward
*Mar 1 00:32:00.167: IP: tableid=0, s=202.96.128.143 (Ethernet0), d=192.168.66.
6 (Ethernet0), routed via RIB
*Mar 1 00:32:00.167: IP: s=202.96.128.143 (Ethernet0), d=192.168.66.6 (Ethernet
0), len 60, rcvd 3
*Mar 1 00:32:00.523: IP: s=192.168.66.6 (Ethernet0), d=202.96.128.143 (Loopback
0), g=10.0.1.2, len 49, forward
*Mar 1 00:32:00.527: IP: tableid=0, s=192.168.66.6 (Loopback0), d=202.96.128.14
3 (Ethernet0), routed via FIB
*Mar 1 00:32:00.527: IP: s=192.168.66.6 (Loopback0), d=202.96.128.143 (Ethernet
0), g=192.168.66.66, len 49, forward


accept , challenge , brightness
发表于2006/03/6, 13:58
      Top
  wyn_82 离线
3. Re:单口NAT问题，抄cico官方配置，却不通？在线等.........
HP : 0 / 261
MP : 51 / 3946
EXP : 46%
武林奇才


成员等级: 11
发表总数: 154
金币总数: 272
所属组别: 普通成员
注册日期: 2003/11/11

 set ip next-hop 10.0.1.2
这条命令应该改为：set ip next-hop 10.0.1.1
发表于2006/03/8, 13:20
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  whelks 离线
4. RE: 单口NAT问题，抄cico官方配置，却不通？在线等.........
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江湖小虾


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QUOTE
set ip next-hop 10.0.1.2
这条命令应该改为：set ip next-hop 10.0.1.1


指定下一跳为10.0.1.2也是对的，因为loopback口设的子网掩码是255.255.255.252，发往10.0.1.2的数据包会丢向loopback 0端口的，达到了经过loopback 0 中转的目的，
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
我做了一个loopback 0 做nat inside的配置，NAT on a stick 就可以正常使用，可是做为 nat ouside的时候就不可以了，，，

aaa# show ru
Building configuration...

Current configuration : 1019 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname aaa
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$i7CQ$DYvP.0tX9oMaQKav.H5Q1.
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
ip cef
!
!
!
no ip domain lookup
no ftp-server write-enable
!
!
!
!
interface Loopback0
ip address 172.24.75.1 255.255.255.0
ip nat inside
!
interface Ethernet0
no ip address
shutdown
half-duplex
!
interface FastEthernet0
ip address 10.10.10.88 255.255.255.0 secondary
ip address 192.168.66.88 255.255.255.0
ip nat outside
ip policy route-map map
speed auto
!
ip nat inside source list 1 interface FastEthernet0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.66.66
no ip http server
!
access-list 1 permit 10.10.10.0 0.0.0.255
route-map map permit 10
match ip address 1
set interface Loopback0
!
!
line con 0
line aux 0
line vty 0 4
password cisco
login
!
!
end



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cisco官方网站就是这样写的，
http://www.cisco.com/en/US/tech/tk648/tk36...080094430.shtml




accept , challenge , brightness
发表于2006/03/8, 14:16
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  langhua 离线
5. Re:单口NAT问题，抄cico官方配置，却不通？在线等.........
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注册日期: 2003/10/28

 恩。
不行就对了

认真判断数据流的方向
发表于2006/03/10, 14:13
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