Created question in FIWARE Q/A platform on 22-03-2021 at 09:03
Please, ANSWER this question AT https://stackoverflow.com/questions/66742992/how-to-access-fiware-context-behind-wilma-pep-proxyavoiding-cors-restrictions

Question:
How to access Fiware context behind WILMA PEP proxyavoiding CORS restrictions?

Description:
I am accessing a dockerized orin context broker through a React App. All works fine in the local network but when I deploy to a remote server the request gets blocked by CORS.
i create the request using ngsijs library:
componentDidMount() {
var connection = new NGSI.Connection("http://172.16.2.30:1027", {
headers:

});

All works with my local address.
I tried to disable cross scripting protection in wilma context broker in the environment configuration of the docker container :

• PEP_PASSWORD=pep_proxy_bc0e6...
• PEP_PROXY_PDP=idm
• PEP_PROXY_MAGIC_KEY=1234
• PEP_PROXY_PUBLIC_PATHS=/version
• PEP_PROXY_CORS_ORIGIN=false
• PEP_PROXY_CORS_METHODS=GET,HEAD,PUT,PATCH,POST,DELETE
• PEP_PROXY_CORS_MAX_AGE=true`

The error which I receive is

Access to fetch at 'http://my_public_domain.net:1027/v2/entities? type=SimpleSensor' from origin 'http://87.254.4.166:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.

The Keyrock IDM works on the exposed domain without any problem allowing identity management.
We are using Apache to redirect the calls to the docker server.