Question:

Can you provide a list of sites and IP addresses that OpenRoads ConceptStation needs to access?

Answer:

https://connect-contextservices.bentley.com/ (for GeoCoordination Services)

For Update 7 or newer

https://connect-geoportalmapservice.bentley.com/ (for Map Control)

For Update 6 or older

https://api.mapbox.com (for Map control)

https://a.tiles.mapbox.com (for Map control)

https://b.tiles.mapbox.com (for Map control)

ftp://rockyftp.cr.usgs.gov (for USGS files)

https://prd-tnm.s3.amazonaws.com  (for USGS files)

https://dds.cr.usgs.gov (for USGS files)

https://s3-us-west-2.amazonaws.com (for USGS files)

https://www.openstreetmap.org/

http://overpass-api.de (for OpenStreetMap)

For Bing Maps:

https://dev.virtualearth.net
http://dev.virtualearth.net   
http://ecn.t*.tiles.virtualearth.net

Also, please see this article for the connection requirements for CONNECT: http://communities.bentley.com/products/licensing/w/licensing__wiki/6857.connecting-to-the-bentley-servers-through-firewalls-and-proxy-servers-faq