5 added 20 characters in body
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What you want is known as a captive portal. Indeed, it is not obligatory to provide a Internet connection.

However, for instance, iOS, Windows, Mac OS and Android test know generic URLs for testing out if Wifi is working, and you might have to setup that for having the wifi icon marked as healthy on the client side.

What you ask is doable, but doing it purely in Linux without installing much software involves some web server/services and DNS server/service trickery (+DCHP and hostpad).

For having an automatic web page/warning for login you need to place WISPr tags in the first page the captive port redirects the device to. The major caveat for someone not experienced on that, is the WISPr tags cannot point again to the same page, as you will have recursive requests then.

For the breadcrumbs clues on how to do it, please visit the following questions on U&L

Captive portal using Apache

Captive portal detection, popup implementation?

Getting WISPr tags from a FON authentication portal

Connecting to wifi network with captive portal login page using wpa_supplicant

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

Can I get dnsmasq to drop/reject/redirect any address queries except one?

related:

Disabling CNA in MacOS

What you want is known as a captive portal. Indeed, it is not obligatory to provide a Internet connection.

However, for instance, iOS, Windows, Mac OS and Android test know generic URLs for testing out if Wifi is working, and you might have to setup that for having the wifi icon marked as healthy on the client side.

What you ask is doable, but doing it purely in Linux without installing much software involves some web server/services and DNS server/service trickery.

For having an automatic web page/warning for login you need to place WISPr tags in the first page the captive port redirects the device to. The major caveat for someone not experienced on that, is the WISPr tags cannot point again to the same page, as you will have recursive requests then.

For the breadcrumbs clues on how to do it, please visit the following questions on U&L

Captive portal using Apache

Captive portal detection, popup implementation?

Getting WISPr tags from a FON authentication portal

Connecting to wifi network with captive portal login page using wpa_supplicant

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

Can I get dnsmasq to drop/reject/redirect any address queries except one?

related:

Disabling CNA in MacOS

What you want is known as a captive portal. Indeed, it is not obligatory to provide a Internet connection.

However, for instance, iOS, Windows, Mac OS and Android test know generic URLs for testing out if Wifi is working, and you might have to setup that for having the wifi icon marked as healthy on the client side.

What you ask is doable, but doing it purely in Linux without installing much software involves some web server/services and DNS server/service trickery (+DCHP and hostpad).

For having an automatic web page/warning for login you need to place WISPr tags in the first page the captive port redirects the device to. The major caveat for someone not experienced on that, is the WISPr tags cannot point again to the same page, as you will have recursive requests then.

For the breadcrumbs clues on how to do it, please visit the following questions on U&L

Captive portal using Apache

Captive portal detection, popup implementation?

Getting WISPr tags from a FON authentication portal

Connecting to wifi network with captive portal login page using wpa_supplicant

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

Can I get dnsmasq to drop/reject/redirect any address queries except one?

related:

Disabling CNA in MacOS

4 Fixed typo.
source | link

What you want is knowknown as a captive portal. Indeed, it is not obligatory to provide a Internet connection.

However, for instance, iOS, Windows, Mac OS and Android test know generic URLs for testing out if Wifi is working, and you might have to setup that for having the wifi icon marked as healthy on the client side.

What you ask is doable, but doing it purely in Linux without installing much software involves some web server/services and DNS server/service trickery.

For having an automatic web page/warning for login you need to place WISPr tags in the first page the captive port redirects the device to. The major caveat for someone not experienced on that, is the WISPr tags cannot point again to the same page, as you will have recursive requests then.

For the breadcrumbs clues on how to do it, please visit the following questions on U&L

Captive portal using Apache

Captive portal detection, popup implementation?

Getting WISPr tags from a FON authentication portal

Connecting to wifi network with captive portal login page using wpa_supplicant

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

Can I get dnsmasq to drop/reject/redirect any address queries except one?

related:

Disabling CNA in MacOS

What you want is know as a captive portal. Indeed, it is not obligatory to provide a Internet connection.

However, for instance, iOS, Windows, Mac OS and Android test know generic URLs for testing out if Wifi is working, and you might have to setup that for having the wifi icon marked as healthy on the client side.

What you ask is doable, but doing it purely in Linux without installing much software involves some web server/services and DNS server/service trickery.

For having an automatic web page/warning for login you need to place WISPr tags in the first page the captive port redirects the device to. The major caveat for someone not experienced on that, is the WISPr tags cannot point again to the same page, as you will have recursive requests then.

For the breadcrumbs clues on how to do it, please visit the following questions on U&L

Captive portal using Apache

Captive portal detection, popup implementation?

Getting WISPr tags from a FON authentication portal

Connecting to wifi network with captive portal login page using wpa_supplicant

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

Can I get dnsmasq to drop/reject/redirect any address queries except one?

related:

Disabling CNA in MacOS

What you want is known as a captive portal. Indeed, it is not obligatory to provide a Internet connection.

However, for instance, iOS, Windows, Mac OS and Android test know generic URLs for testing out if Wifi is working, and you might have to setup that for having the wifi icon marked as healthy on the client side.

What you ask is doable, but doing it purely in Linux without installing much software involves some web server/services and DNS server/service trickery.

For having an automatic web page/warning for login you need to place WISPr tags in the first page the captive port redirects the device to. The major caveat for someone not experienced on that, is the WISPr tags cannot point again to the same page, as you will have recursive requests then.

For the breadcrumbs clues on how to do it, please visit the following questions on U&L

Captive portal using Apache

Captive portal detection, popup implementation?

Getting WISPr tags from a FON authentication portal

Connecting to wifi network with captive portal login page using wpa_supplicant

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

Can I get dnsmasq to drop/reject/redirect any address queries except one?

related:

Disabling CNA in MacOS

3 added 294 characters in body
source | link

What you want is know as a captive portal. Indeed, it is not obligatory to provide a Internet connection.

However, for instance, iOS, Windows, Mac OS and Android test know generic URLs for testing out if Wifi is working, and you might have to setup that for having the wifi icon marked as healthy on the client side.

What you ask is doable, but doing it purely in Linux without installing much software involves some web server/services and DNS server/service trickery.

For having an automatic web page/warning for login you need to place WISPr tags in the first page the captive port redirects the device to. The major caveat for someone not experienced on that, is the WISPr tags cannot point again to the same page, as you will have recursive requests then.

For the breadcrumbs clueclues on how to do it, please visit the following questions on U&L

Captive portal using Apache

Captive portal detection, popup implementation?

Getting WISPr tags from a FON authentication portal

Connecting to wifi network with captive portal login page using wpa_supplicant

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

Can I get dnsmasq to drop/reject/redirect any address queries except one?

related:

Disabling CNA in MacOS

What you want is know as a captive portal. Indeed, it is not obligatory to provide a Internet connection.

However, for instance, iOS, Windows, Mac OS and Android test know generic URLs for testing out if Wifi is working, and you might have to setup that for having the wifi icon marked as healthy on the client side.

What you ask is doable, but doing it purely in Linux without installing much software involves some web server/services and DNS server/service trickery.

For the breadcrumbs clue, please visit the following questions on U&L

Captive portal using Apache

Captive portal detection, popup implementation?

Getting WISPr tags from a FON authentication portal

Connecting to wifi network with captive portal login page using wpa_supplicant

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

Can I get dnsmasq to drop/reject/redirect any address queries except one?

related:

Disabling CNA in MacOS

What you want is know as a captive portal. Indeed, it is not obligatory to provide a Internet connection.

However, for instance, iOS, Windows, Mac OS and Android test know generic URLs for testing out if Wifi is working, and you might have to setup that for having the wifi icon marked as healthy on the client side.

What you ask is doable, but doing it purely in Linux without installing much software involves some web server/services and DNS server/service trickery.

For having an automatic web page/warning for login you need to place WISPr tags in the first page the captive port redirects the device to. The major caveat for someone not experienced on that, is the WISPr tags cannot point again to the same page, as you will have recursive requests then.

For the breadcrumbs clues on how to do it, please visit the following questions on U&L

Captive portal using Apache

Captive portal detection, popup implementation?

Getting WISPr tags from a FON authentication portal

Connecting to wifi network with captive portal login page using wpa_supplicant

Mac Unable to Connect to a Wifi Hotspot - Google Starbucks

Can I get dnsmasq to drop/reject/redirect any address queries except one?

related:

Disabling CNA in MacOS

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