isa vpn site to site 实质（之二）

前面文章里我们讲了isa vpn site to site他的实质就是按需拨号路由，按需拨号路由分为单向的，双向的，此isa的是双向拨号路由，那么符合双向拨号路由的特征是什么呢？

双向拨号路由具有以下的特征：

Both routers are configured as LAN and WAN routers.

User accounts are added for both routers so that the authentication credentials of the calling router are accessed and validated by the answering router.

Demand-dial interfaces are fully configured on both routers and include the phone number of the answering router and user account credentials to authenticate the calling router.

Static routes are configured on both routers.

 

我们着重看最后一点，双向拨号路由必须有静态路由的，那么在配置isa vpn的时候是怎样配置的呢？看下图：

配置完毕后在查看一下rras：

 

 

静态路由是双向的，这下应该明白了吧。