Angular 6 project with PHP back-end is given (on a classic Apache server).
Everything works very well from localhost and production server as well. But once my friend tried to login from his university (he was behind a proxy there), it didn't work.
We can see the followings in the OPTIONS request response headers:
Connection: close
Content-Type: text/html
Transfer-encoding: chunked
Via: 1.0 firewall.uninamehere.com:3128 (squid)
X-Cache: MISS from firewall.uninamehere.com
X-Cache-Lookup: MISS from firewall.uninamehere.com:3128
That's all.
After OPTIONS a login POST request should start. But it doesn't...
He said that the proxy is shhh for a while, and sometimes WIFI also does not work.
The questions are: