Shulou(Shulou.com)05/31 Report--

How to carry out URL filtering, in view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and easy way.

Url filtering

1 create a class-map (class map) to identify the transport traffic.

The network segment of the first intranet

Second, define regular expressions that determine the (domain name) keywords contained in url

Third, check whether the header of the IP message is http traffic.

2 create policy-map (policy map) and associate class-map

Or allow this link

Or discard this link

Policies are usually applied to inside (inbound) interfaces

Only one policy map can be applied to an interface

3 apply class-map to the interface.

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/ / define ACL access control list aclfile//

Access-list aclfile extended permit tcp 192.168.100.0 255.255.255.0 any eq www

Establish a class map aclclass

Class-map aclclass

Match access-list aclfile / / match access control list / /

/ / define a regular expression that specifies that you need to filter websites that are not allowed to visit / /

Regex url "\ .accp\ .com" / / * be careful not to write the slash backwards * / /

Establish a class map urlclass

Class-map type regex match-any urlclass

Match regex url / / call matching regular expression / /

Httpclass / / establish a class map for checking traffic / /

Class-map type inspect http httpclass

Match request header host regex class urlclass / / calls the previously configured urlclass1//

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Policy-map type inspect http httppolicy / / establish policy mapping / /

Class httpclass / / call to check the class mapping of the http header / /

Drop-connection log / / discard and log / /

Policy-map insidepolicy / / A pair of access control lists are operated to define the corresponding policies / /

Class aclclass / / call the class mapping of the access control list / /

Inspect http httppolicy / / check the defined policy map / /

Service-policy insidepolicy interface inside / / apply on the port / /

This is the end of the answer to the question on how to filter URL. I hope the above content can be of some help to you. If you still have a lot of doubts to solve, you can follow the industry information channel to learn more about it.

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