Why did the request to third-party servers suddenly start to hang or slow down?

Question

PHP

VPS server.
The site has been working fine for 2 years. A couple of days ago, problems started at some point.
- All requests from the site to Google servers, such as Google captcha or requests to googleapis.com, started hanging.
The call goes through file_get_contents. In the logs I see:
PHP Warning: file_get_contents(...) failed to open stream: Connection timed out in
- Similarly, an attempt to create an image by a link to a third-party site is hanged by timeout.
- At the same time, here I began to work out git pull to the repository on bitbucket for
a very long time - pages began to open periodically for a very long time (can it somehow be tied to the web sockets that are used?)
Tell me, in which direction to dig?
PS I replaced file_get_contents with curl - it started working, but with brakes.
PSS Now different pages of the site are periodically loaded for a very long time. Moreover, with such brakes, the assembly of the page takes 50-55 seconds. In parallel, pages can be given to another visitor almost instantly, and I'm monitoring top loading - I don't see that there was any load on resources.

Answer 1

towards the quality of the network of your vds