Not really MITM; this looks more like a DNS hijacking.
Some providers put this kind of stuff in one of the following cases:
- you didn't paid your bills;
- they have new offers to show you;
- they are just jerks.
Some providers put this kind of stuff in one of the following cases:
- you didn't paid your bills;
- they have new offers to show you;
- they are just jerks.
- I have paid the bills
- Clicking continue just goes into my ISP account panel and not to the actual site, so not really an "offer" popup or anything.
- Yes they definitely are. Most of the "my Internet" now points to their servers. I have no idea how long they're going to take to fix this.
@ OP, what happens when you browse to https://www.stackoverflow.com ?
Regardless of whether it's MITM or DNS hijacking causing the issue, it's clearly your ISP doing it.