loopback - Dave's Blog

Windows.Web.UI.Interop.WebViewControl localhost access

2018 Jul 25, 5:34

If you're developing with the new Windows.Web.UI.Interop.WebViewControl you may have noticed you cannot navigate to localhost HTTP servers. This is because the WebViewControl's WebView process is a UWP process. All UWP processes by default cannot use the loopback adapter as a security precaution. For development purposes you can allow localhost access using the checknetisolation command line tool on the WebViewControl's package just as you can for any other UWP app. The command should be the following:

checknetisolation loopbackexempt -a -n=Microsoft.Win32WebViewHost_cw5n1h2txyewy

As a warning checknetisolation is not good on errors. If you attempt to add a package but get its package family name wrong, checknetisolation just says OK:

C:\Users\davris>checknetisolation LoopbackExempt -a -n=Microsoft.BingWeather_4.21.2492.0_x86__8wekyb3d8bbwe
OK.

And if you then list the result of the add with the bad name you'll see the following:

[1] -----------------------------------------------------------------
    Name: AppContainer NOT FOUND
    SID:  S-1-15-...

There's also a UI tool for modifying loopback exemption for packages available on GitHub and also one available with Fiddler.

As an additional note, I mentioned above you can try this for development. Do not do this in shipping products as this turns off the security protection for any consumer of the WebViewControl.

RFC 5514 - IPv6 over Social Networks

2009 Apr 1, 10:42Lol at actual Facebook app that does IPv6 over Facebook. "...most network users are not aware of what IPv6 is or are even afraid by IPv6 because it is unknown. On the other hand, Social Networks (like Facebook, LinkedIn, etc.) are well-known by users and the usage of those networks is huge... With IPv6 over Social Network (IPoSN): * Every user is a router with at least one loopback interface; * Every friend or connection between users will be used as a point-to-point link... A working prototype has been developed by the author and is freely available: IPv6 over Facebook Social Network [IPv6overFacebook]."

humor social network ipv6 ip iposn facebook ietf rfc