NEC ZA-SA3500G, Руководство по эксплуатации функций

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56 Function Specification |
3.3.10. URL Filter (UF ）
Viewing is limited by specifying the website category prepared beforehand.
As a result, access to harmful sites and non-business related sites are blocked.
During web browsing, access to known site (URL) is intercepted based on the website category. It is set beforehand
which category is to be blocked. Initially, all categories are set to “Pass” (Do not block).
*Depending on the version of the firmware, the TCP port used in this function differs.
In order to use this function, an environment where TCP port can communicate is necessary.
Port
TCP port =443
[Detection contents]
Traffic to a website of a specified category is detected and access to the concerned website is blocked.
Type of Traffic Description
HTTP traffic The URL host name and path name are used to determine whether traffic is to a
dangerous website
HTTPS traffic The URL host name is used to determine whether traffic is to a dangerous website
When it is determined it is traffic to a website of a specified category, access to the concerned website is blocked
according to the following.
Type of Traffic Description
HTTP traffic (GET) The screen “Page Forbidden“ is displayed.
HTTP traffic (POST) Communication to the concerned website is blocked.
HTTPS traffic
(GET, POST) SSL handshake with the concerned site fails.
[Protocols to be detected]
Protocol Description
HTTP Port number to be detected : 80
HTTP detection method : GET, POST
Known site （ URL ）
Internet
User Network
SA3500G
Block according to
the category