Example 5: Redirect an external URL to an internal URL
Example Inc. wants to hide its actual server room configuration from users to improve security on its Web servers.
To do this, you would create a rewrite action with the values as shown in the following tables. For request headers, the action in the table modifieswww.example.comto web.hq.example.net. For response headers, the action does the opposite, translatingweb.hq.example.nettowww.example.com.
| Action Name |
Type of Rewrite Action |
Expression to choose target reference |
String expression for replacement text |
| Action-Rewrite-Request_Server_Replace |
REPLACE |
HTTP.REQ.HOSTNAME.SERVER |
“Web.hq.example.net” |
| Action-Rewrite-Response_Server_Replace |
REPLACE |
HTTP.RES.HEADER(“Server”) |
“www.example.com” |
The first policy checks incoming requests to see if they are valid, and if they are, it performs the Action-Rewrite-Request_Server_Replace action. The second policy checks responses to see if they originate at the serverweb.hq.example.net. If they do, it performs the Action-Rewrite-Response_Server_Replace action.
Examples of rewrite action and policy for redirecting an external URL.
添加修改法案ion Action-Rewrite-Request_Server_Replace REPLACE HTTP.REQ.HOSTNAME.SERVER '"Web.hq.example.net"'
添加修改法案ion Action-Rewrite-Response_Server_Replace REPLACE HTTP.RES.HEADER("Server") '"www.example.com"'
add rewrite policy Policy-Rewrite-Request_Server_Replace HTTP.REQ.HOSTNAME.SERVER.EQ("www.example.com") Action-Rewrite-Request_Server_Replace NOREWRITE
add rewrite policy Policy-Rewrite-Response_Server_Replace HTTP.REQ.HEADER("Server").EQ("Web.hq.example.net") Action-Rewrite-Response_Server_Replace
Finally, you would bind the rewrite policies, assigning each a priority of 500 because they are in different policy banks and therefore will not conflict. You should set the goto expression to NEXT for both bindings.
bind rewrite global Policy-Rewrite-Request_Server_Replace 500 END -type REQ_DEFAULT
bind rewrite global Policy-Rewrite-Response_Server_Replace 500 END -type RES_DEFAULT
All instances ofwww.example.comin the request headers are now changed toweb.hq.example.net, and all instances ofweb.hq.example.netin response headers are now changed towww.example.com.
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