application/octet-stream through nginx + php-fpm

[pdemichele]

Hi there,
since today I'm experiencing a very weird issue with VestaCP
I'm running Ubuntu 16.04 with nginx + php-fpm configuration
I noticed that last night Ubuntu did the security updates and the day after the server has been restarted as per custom configuration
Here the apt history log:

Start-Date: 2019-06-07 06:16:11
Commandline: /usr/bin/unattended-upgrade
Upgrade: php7.0-cgi:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-cli:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-fpm:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-gd:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-opcache:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-pspell:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-common:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-json:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-mbstring:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-readline:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-xml:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-curl:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-ldap:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-mcrypt:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-imap:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-intl:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-soap:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), libapache2-mod-php7.0:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5), php7.0-mysql:amd64 (7.0.33-0ubuntu0.16.04.4, 7.0.33-0ubuntu0.16.04.5)
End-Date: 2019-06-07 06:16:45

Start-Date: 2019-06-08 06:26:00
Commandline: /usr/bin/unattended-upgrade
Remove: linux-modules-extra-4.4.0-145-generic:amd64 (4.4.0-145.171), linux-modules-4.4.0-145-generic:amd64 (4.4.0-145.171), linux-headers-4.4.0-145:amd64 (4.4.0-145.171), linux-image-4.4.0-145-generic:amd64 (4.4.0-145.171), linux-headers-4.4.0-145-generic:amd64 (4.4.0-145.171)
End-Date: 2019-06-08 06:26:09

After that, I'm experiencing a really weird issue when I'm trying to contact my website through the port 80
As per configuration already did in past, when someone requires a website in this form (domain.tld) nginx will redirect the link in https (https://domain.tld)
That configuration is working for more than a year because I do not usually change a production environment
What happened now?
If I try to reach a website as explained before the browser give me the possibility to download an application/octet-stream without visualising the website
If I try to reach directly the website through the port 443 (https://domain.tld) it works as expected
I tried to compare 2 different VestaCP web server but the configurations seemed the same
It seems like the nginx is not handling correctly the requests through its proxy and serving it through php-fpm

If you need more detail or some configure files just let me know
Thanks in advance for your collaboration

[pdemichele]

Any advice or anyone have something in mind?