To enable our web based products to operate without error, there may be occasions when certain URLs/Hosts will need to be added to your firewall's whitelist / allowed URLs, generally we recommend you do this by DNS/Domain Name - NOT by IP address, our IP address lists are prone to change overtime and we cannot always communicate this information to you in a timely manner.
It may not be necessary to add all of the below, if you are having issues, we suggest you add the minimum to overcome any issues you are having. If you are unsure which of the below will fix your issue, add them all and then remove one at a time until the issue reoccurs, this will indicate the URL(s) that needs to remain in your firewall's whitelist.
Permit access to the following URLs/Hosts:
*guestline.net
*ap.guestline.net
*eu.guestline.net
*roomlynx.net
*rezlynx.net
*guestline.com
*rezlynx.org
*roomlynx.org
*guestline.app
static.zdassets.com
*zendesk.com
app.getbeamer.com
fonts.googleapis.com
fonts.gstatic.com
unpkg.com
gloc0174e07bae700dc2.blob.core.windows.net
*gravatar.com
optimizely.com
*.optimizely.com
If you have issues with the operation of any of our web based products after adding the above, please contact the Support Desk.