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・ Captive Hearts, Captive Minds
・ Captive helicopter
・ Captive import
・ Captive insurance
・ Captive killer whales
・ Captive market
・ Captive Market (short story)
・ Captive Media
・ Captive Nations
・ Captive Nations Week
・ Captive NTFS
・ Captive odorant
・ Captive of Billy the Kid
・ Captive of the Desert
・ Captive plane
Captive portal
・ Captive Primate Safety Act
・ Captive Pursuit
・ Captive Queens
・ Captive service
・ Captive Souls
・ Captive supply
・ Captive unit
・ Captive Universe
・ Captive white tigers
・ Captive Wild Woman
・ Captive Witness
・ Captive Women
・ Captive! (Paulsen novel)
・ CaptiveAire Systems


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Captive portal : ウィキペディア英語版
A captive portal is a special web page that is shown before using the Internet normally. The portal is often used to present a login page.(CaptivePortal ) This is done by intercepting most packets, regardless of address or port, until the user opens a browser and tries to access the web. At that time the browser is redirected to a web page which may require authentication and/or payment, or simply display an acceptable use policy and require the user to agree. Captive portals are used at many Wi-Fi hotspots, and can be used to control wired access (e.g. apartment houses, hotel rooms, business centers, "open" Ethernet jacks) as well.Since the login page itself must be presented to the client, either that login page is locally stored in the gateway, or the web server hosting that page must be "whitelisted" via a closed platform to bypass the authentication process. Depending on the feature set of the gateway, multiple web servers can be whitelisted (say for iframes or links within the login page). In addition to whitelisting the URLs of web hosts, some gateways can whitelist TCP ports. The MAC address of attached clients can also be set to bypass the login process.This technique has occasionally been referred to as UAM (Universal Access Method) in implementations and standards forums.==Implementation==There is more than one way to implement a captive portal.

A captive portal is a special web page that is shown before using the Internet normally. The portal is often used to present a login page.〔(CaptivePortal )〕 This is done by intercepting most packets, regardless of address or port, until the user opens a browser and tries to access the web. At that time the browser is redirected to a web page which may require authentication and/or payment, or simply display an acceptable use policy and require the user to agree. Captive portals are used at many Wi-Fi hotspots, and can be used to control wired access (e.g. apartment houses, hotel rooms, business centers, "open" Ethernet jacks) as well.
Since the login page itself must be presented to the client, either that login page is locally stored in the gateway, or the web server hosting that page must be "whitelisted" via a closed platform to bypass the authentication process. Depending on the feature set of the gateway, multiple web servers can be whitelisted (say for iframes or links within the login page). In addition to whitelisting the URLs of web hosts, some gateways can whitelist TCP ports. The MAC address of attached clients can also be set to bypass the login process.
This technique has occasionally been referred to as UAM (Universal Access Method) in implementations and standards forums.
==Implementation==

There is more than one way to implement a captive portal.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「A captive portal is a special web page that is shown before using the Internet normally. The portal is often used to present a login page.(CaptivePortal ) This is done by intercepting most packets, regardless of address or port, until the user opens a browser and tries to access the web. At that time the browser is redirected to a web page which may require authentication and/or payment, or simply display an acceptable use policy and require the user to agree. Captive portals are used at many Wi-Fi hotspots, and can be used to control wired access (e.g. apartment houses, hotel rooms, business centers, "open" Ethernet jacks) as well.Since the login page itself must be presented to the client, either that login page is locally stored in the gateway, or the web server hosting that page must be "whitelisted" via a closed platform to bypass the authentication process. Depending on the feature set of the gateway, multiple web servers can be whitelisted (say for iframes or links within the login page). In addition to whitelisting the URLs of web hosts, some gateways can whitelist TCP ports. The MAC address of attached clients can also be set to bypass the login process.This technique has occasionally been referred to as UAM (Universal Access Method) in implementations and standards forums.==Implementation==There is more than one way to implement a captive portal.」の詳細全文を読む



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