At least in a single case ajax.aspnetcdn.com is blocked with DPI.
Direct HTTP/HTTPS connections to its 40.118.185.161 and 152.199.19.160 addresses generally work fine, according to ping-admin points.
https://ajax.aspnetcdn.com test — Южно-Сахалинск point can’t establish the connection to the same IP, while the previous tests were fine.