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Website filtering method and device
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A website and purpose technology, applied in the field of website filtering, can solve the problems of high cost and users unable to access the website.
Pending Publication Date: 2021-01-19
XIAN ZHONGXING NEW SOFTWARE
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Problems solved by technology
The current public filtering scheme is mainly to filter the network through the domain namesystem (DNS, Domain NameSystem) filtering method. When the user initiates a DNS request, it is judged whether the requested website is a website to be filtered, and if so, DNS resolution is not performed. so that the user cannot access the corresponding website
In this method, when the user initiates a DNS request through the client, the website can be well filtered, and when the user initiates a DNS request through the browser, because the DNS resolution is performed and the Internet is obtained when the DNS request is initiated for the first time ( IP, Internet Protocol) address, the IP address will be cached, and if the cached IP address has not expired when the DNS request is initiated, DNS resolution is not required. Therefore, when the user initiates a DNS request through the browser, the cached IP address Websites without expiration cannot be effectively filtered, and this filtering method needs to deploy a dedicated DNS server on the network side, which costs more
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example 1
[0065] In this example, website filtering is performed through the router, such as figure 2 shown, including:
[0066] Step 200, after the user adds website keywords to be filtered on the router setting page, the router internally monitors all application layer messages sent by the user and judges them, and then executes step 201.
[0067] Step 201, the router judges whether the packet is a DNS request packet, and if not, execute step 202. If it is a DNS request message, it is judged whether the current domain name to be resolved contains the keyword of the website to be filtered, if not, it is released, and if it is, the message is discarded;
[0068] Judgment method of DNS request message: According to the characteristics of the DNS request message, search for the TCP message or UDP message sent by the user whose destination port is 53. If found, it means that the message is a DNS request message.
[0069] Step 202, determine whether the message is an HTTP request message...
example 2
[0075] In this example, website filtering is performed through the router, such as image 3 shown, including:
[0076] Step 300 , after the parent user adds the child user's website keywords to be filtered on the router setting page, the router internally monitors all application layer messages sent by the child user and judges them, and then executes step 301 .
[0077] Step 301 , the router judges whether the packet is a DNS request packet, and if not, execute step 302 . If it is a DNS request message, it is judged whether the current domain name to be resolved contains the keyword of the website to be filtered, if not, it is released, and if it is, the message is discarded;
[0078] Judgment method of DNS request message: According to the characteristics of the DNS request message, search for the TCP message or UDP message sent by the user whose destination port is 53. If found, it means that the message is a DNS request message.
[0079] Step 302, determine whether the m...
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Abstract
An embodiment of the invention discloses a website filtering method and device. The website filtering method comprises the following steps that: Internet surfing equipment monitors a message sent by auser or a message returned to the user, wherein the message is an application layer message; when the Internet surfing equipment judges that the message contains the website keyword to be filtered, or judges that the message contains the website keyword to be filtered corresponding to the identification information of the user, or judges that the message contains the website keyword to be filtered corresponding to the message type to which the message belongs, or, judges that the message contains the identification information of the user and the to-be-filtered website keyword corresponding to the message type to which the message belongs, the Internet surfing device discards the message. According to the method disclosed in the embodiment of the invention, the messages of the applicationlayer are filtered through the internet device, and all messages related to internet surfing of a user pass through the internet device, and therefore websites are effectively filtered through the internet device.
Description
technical field [0001] Embodiments of the present invention relate to but are not limited to the field of the Internet, especially a method and device for filtering websites. Background technique [0002] At present, network risks are increasing day by day, so it is imperative to realize the security filtering of websites. The current public filtering scheme is mainly to filter the network through the domain namesystem (DNS, Domain NameSystem) filtering method. When the user initiates a DNS request, it is judged whether the requested website is a website to be filtered, and if so, DNS resolution is not performed. Thus, the user cannot access the corresponding website. In this method, when the user initiates a DNS request through the client, the website can be well filtered, and when the user initiates a DNS request through the browser, because the DNS resolution is performed and the Internet is obtained when the DNS request is initiated for the first time ( IP, Internet ...
Claims
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Application Information
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