Multi-Homing Security Gateway User’s Manual
WAN 1
WAN 2
DNS Server
Bandwidth Monitor
1
2
3
4
5
6
URL Host Map
7
8
9
10
DNS Request
DNS Reply
HTTP Request
HTTP Reply
11
HTTP Server
In the example above, the client is making a DNS request.
(1). The request is sent to the DNS server of MH-1000 through WAN2.
(2). WAN2 will route this request to the embedded DNS server of MH-1000.
(3). MH-1000 will analyze the bandwidth of both WAN1 and WAN2 and decide which WAN IP to reply to the
request.
(4). After the decision is made, MH-1000 will route the DNS reply to the user through WAN2.
(5). The user will receive the DNS reply with the IP address of WAN1.
(6). The browser will initiate an HTTP request to the WAN1 IP address.
(7). The HTTP request will be send to MH-1000’s URL Host Map.
(8). The Host Map will then redirect the HTTP request to the HTTP server.
(9). The HTTP server will reply.
(10). The URL Host Map will route the packet through WAN1 to the user.
(11). Finally, the client will receive an HTTP reply packet.
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