rstudio server: "unexpected response"

[dalejbarr]

Seems to be happening mainly among students accessing the RStudio server from China.

info from J. McClure:

"Advice (local/central and global) is to always have some antivirus/malware software installed, and to keep the system patched. My additional advice would be to run MalwareBytes on a machine with difficulties to run spot check and identify and clear any problems. We have tested the Rstudio Server connection with all the regular browsers and a few irregular (opera, iceweasel etc) without any problems, so it is likely to be an infection/malicious plugin. Considering the nature of the clients, I am quite surprised this is the extent of the problems - we see some pretty messed up machines come through our offices. 1134 users logged in in the last 2 months and 25->250 sessions at any one time, we doing pretty well."