It turns out that my caring ISP really has a free firewall service
which is enabled by default.
I asked my ISP to disable it completely and now everything is OK.
Thank you!
29.11.2020 13:08, Stuart Henderson пишет:
> On 2020-11-29, Родин Максим <a23s4a2008@yandex.ru> wrote:
>> The problem is that only port 80 seems to be open from the outside.
>> I used several online port scanners to check this.
>> All of them tell:
>> port 80 OPEN
>> port 443 CLOSED
>
> Could it be blocked by your ISP? Do you receive packets on your external
> interface at all when you test port 443?
>
>
--
С уважением,
Родин Максим
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