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Cookies are only accessible to a single domain that they are set to. I believe if you are using two sub-domains on the same domain it would be possible to share the cookies, however the browser doesn’t send cookies set on one domain to any others.
How to prevent multiple browser windows from sharing the same session?
Store your main web page in an iframe. Have javascript to check if your web page is still in the parent iframe. If not, then they have opened multiple browser windows. You need to make sure your entire app is iframe friendly.
Is there a way to block cookies in Internet Explorer?
Many people want to limit the amount of information that is gathered about them, and do so by limiting the kind of cookies that their browser accepts and retains. Today, we’re going to look at some quick ways to do this is Internet Explorer, Firefox, and Chrome using whitelists.
Is there a way to never accept cookies from websites?
Under “Accept third-party cookies,” select “Never.” You can also change the first-party cookie setting de-selecting “Accept cookies from sites”. You can click the “Exceptions” button to manually add your most visited websites to the list, enabling them to store cookies for convenient logins and other settings.
Do you need the WPMU domain mapping plugin?
If you’re using an older version, you will need the WordPress MU Domain Mapping plugin. So it appears that the WPMU Domain Mapping plugin is unnecessarily included in the AWS Lightsail Bitnami Multisite package. I just finished troubleshooting a similar issue with subdomain multisite.
This means (A) must write their customer ID to a cookie, which (B) can read, and then (B) can request the data from the web service, and pre-populate the form. This raises two questions: Can website (B) read the cookie for website (A)?
How to share cookies across apps in ASP.NET?
When hosting apps that share cookies across subdomains, specify a common domain in the Cookie.Domain property. To share cookies across apps at contoso.com, such as first_subdomain.contoso.com and second_subdomain.contoso.com, specify the Cookie.Domain as .contoso.com: