There are certain addons for almost all common web browsers to ignore these CORS-errors and allow those requests even if there is no security header present. For testing purposes in my projects I’m using the “Moesif Origin & CORS Changer” addon, which is available in the Chrome addon store. It either allows to deactivate CORS-checks as a whole or on specific web pages (e.g. localhost).

Bypassing “cross-origin request”-errors on testing a web service locally

Developing a website with a REST-backend and XHR-requests to retrieve data from the underlying database requires a lot of early-on local testing. However, in this case the resource is coming from a different origin and modern web browsers block them (CORS error). Is there any way to bypass this behaviour in the development stage?

How to distinguish a peer by its endpoint IPV4 Address at last Router/Switch in a P2P system

In Peer2Peer System using just IPV4 Endpoint Address, suppose that we have a peer in USA and two other peers in a same office at TUWien. As you know Layer2 Switches (Common Switches used in LAN) broadcast the message to the network and just because the last address that USA peer has is the router just before the switch, we can not distinguish between two local peers in a same office. So how should I distinguish them?

Cannot start apache webserver after installation

After the installation the apache webserver didn't worked because it said that the port neccessary is blocked. But I didn't know why or which other program is using that port.
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