Hi,
I have just tested it. The rF2 server is running, I was just on server 1. It takes a few minutes, however, to reload the missing files. Patience is essential. And the right game version is required. Currently the v1109 is running. To set up on the Steam main page, right-click on rFactor2 / Properties / Betas. Then look for the right version in the dropdown menu.
The hacker attack that Marc talks about affects only rFactor, not rFactor2.
ciao, alibaba
P.S. Excuse me, I have to correct myself. As Timothy Weatherly from ISI just told me on my request, some rF2 servers were also affected. Meanwhile, everything is running on Steam.