We have been informed that this is a connection issue with the ACM VPN service. We apologize for any extended downtime. We are currently investigating possible solutions. There is currently no ETA on this issue, however we will update here as more information is known.
If you have any questions, please let an ACM SysAdmin know by emailing sig-sysadmin [at] acm.cs.uic.edu or by messaging the #sig-sysadmin channel on Slack.
Sorry for the inconvenience,
ACM/LUG Systems Administrator 2016-2018