[转贴]DY SITE-SITE VPN
<TABLE width="92%" border=0><TBODY><TR><TD colSpan=3><TABLE cellSpacing=0 cellPadding=0 width="100%" align=center border=0><TBODY><TR><TD align=middle> </TD></TR><TR><TD> </TD></TR><TR><TD style="FONT-WEIGHT: normal; FONT-SIZE: 16pt; LINE-HEIGHT: normal; FONT-STYLE: normal; FONT-VARIANT: normal" height=20><B><FONT color=#003399>动态地址Site-to-Site VPN</FONT></B></TD></TR><TR><TD height=20><SPAN class=hui>来源：<FONT color=blue>ChinaITLab 收集整理</FONT></SPAN></TD></TR><TR><TD width="100%" height=20><SPAN class=hui>2004-10-29 16:11:00</SPAN></TD></TR><TR><TD align=left width="100%"> </TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=0 width="98%" align=center border=0><TBODY><TR><TD class=content style="WORD-BREAK: break-all"><P><BR> 利用Internet 出口线路建立VPN通道实现总、分公司之间的互联，是目前许多公司热衷的方案。以往要建立这样的VPN，需要至少一端使用静态的IP地址。当前很多公司都通过ADSL方式上网，如果要求电信提供静态地址，费用将会大大增加（如深圳512K固定IP的ADSL月租是RMB5000）。现在Cisco IOS 12.3(4)T中新增了根据DNS名称来建立VPN peer 的命令，借助希网(3322.org)、88ip等动态域名解释系统的配合，可以在VPN两端都使用动态地址的ADSL线路,节省大笔费用。<BR> <BR> 关键命令：<BR> set peer {host-name | ip-address}<BR> 说明：<BR> host-name 指定IPSec peer的DNS主机名称，如：myhost.example.com。<BR> dynamic (可选参数) 指定 IPSec peer 的主机名在需要建立IPSec通道的时候才通过DNS服务器解释为IP地址。<BR> ip-address 直接给出IPSec peer的IP地址（传统的配置方式）。<BR> <BR> 示例拓扑图：<BR> <IMG src="http://www.chinaitlab.com/www/imgfiles/2004.10.29.16.11.55.1.jpg"><BR> <BR> 为简单起见实验中使用的是静态地址，实际环境中局域网内应在一台机器上运行动态域名解释客户端程序，以将主机名nbo.3322.org注册到服务器，注册地址是路由器的外网端口地址。<BR> <BR> 配置:<BR> VPN-1(省略了部分无关配置):<BR> <BR> version 12.3<BR> !<BR> hostname vpn-1<BR> !<BR> aaa new-model<BR> !<BR> aaa authentication login authen group radius local<BR> aaa authorization network author local<BR> aaa session-id common<BR> ip subnet-zero<BR> !<BR> ip cef<BR> ip name-server 202.96.134.133<BR> !<BR> crypto isakmp policy 10<BR> authentication pre-share<BR> group 2<BR> crypto isakmp key cisco address 0.0.0.0 0.0.0.0<BR> !<BR> crypto ipsec transform-set s2s esp-des esp-sha-hmac<BR> !<BR> crypto dynamic-map dymap 1<BR> set peer 对端IP<BR> set transform-set s2s<BR> match address 110<BR> !<BR> crypto map mymap 1 ipsec-isakmp dynamic dymap<BR> !<BR> interface FastEthernet0/0<BR> description VPN<BR> ip address 202.11.22.11 255.255.255.248<BR> ip nat outside<BR> crypto map mymap<BR> !<BR> interface FastEthernet0/1<BR> description INSIDE_GATEWAY<BR> ip address 172.16.10.110 255.255.0.0<BR> ip nat inside<BR> !<BR> ip nat inside source route-map nonat interface FastEthernet0/0 overload<BR> ip classless<BR> ip route 0.0.0.0 0.0.0.0 FastEthernet0/0<BR> no ip http server<BR> !<BR> access-list 110 permit ip 172.16.0.0 0.0.255.255 172.30.1.0 0.0.0.255<BR> access-list 120 deny ip 172.16.0.0 0.0.255.255 172.30.1.0 0.0.0.255<BR> access-list 120 permit ip 172.16.0.0 0.0.255.255 any<BR> route-map nonat permit 10<BR> match ip address 120<BR> !<BR> end<BR> <BR> VPN-2(省略了部分无关配置):<BR> <BR> version 12.3<BR> !<BR> hostname vpn-2<BR> !<BR> username mize password 0 http://mize.netbuddy.org<BR> no aaa new-model<BR> ip subnet-zero<BR> !<BR> ip cef<BR> ip name-server 202.96.134.133<BR> !<BR> crypto isakmp policy 1<BR> authentication pre-share<BR> group 2<BR> crypto isakmp key cisco hostname nbo.3322.org<BR> !<BR> crypto ipsec transform-set s2s esp-des esp-sha-hmac<BR> !<BR> crypto map mymap 10 ipsec-isakmp<BR> set peer <FONT color=#f70997>nbo.3322.org</FONT> dynamic 既然是动态IP那 外接口还配置公网IP<BR> set transform-set s2s<BR> match address 110<BR> !<BR> interface FastEthernet0/0<BR> ip address 202.11.22.43 255.255.255.248<BR> ip nat outside<BR> crypto map mymap<BR> !<BR> interface FastEthernet0/1<BR> ip address 172.30.1.1 255.255.255.0<BR> ip nat inside<BR> !<BR> ip nat inside source route-map nonat interface FastEthernet0/0 overload<BR> ip classless<BR> ip route 0.0.0.0 0.0.0.0 FastEthernet0/0<BR> !<BR> access-list 110 permit ip 172.30.1.0 0.0.0.255 172.16.0.0 0.0.255.255<BR> access-list 120 deny ip 172.30.1.0 0.0.0.255 172.16.0.0 0.0.255.255<BR> access-list 120 permit ip 172.30.1.0 0.0.0.255 any<BR> route-map nonat permit 10<BR> match ip address 120<BR> !<BR> end<BR> <BR> 相关调试命令：<BR> show cry isa sa<BR> show cry ipsec sa </P></TD></TR></TBODY></TABLE><FONT color=#44bb74>有点不明白？？？？？</FONT> 请说得具体点，好么 没错，你可以设置一下试试。动态IP和外网不冲突。
页:
[1]