Android Device Whitelisting Guide (Microtouch w/ Esper)

Last updated: August 8, 2026

What are the domains/IP addresses that I need to whitelist for my GRUBBRR device(s) to function?


The table below lists the essential whitelisting options for your GRUBBRR kiosk. 

Address(es)PortsFunction
portal.grubbrr.com443Allows the kiosk to download data from and upload data to the GRUBBRR Portal
pushy.me443Allows the kiosk to receive notifications from the GRUBBRR Portal

13.248.224.0/24
13.248.225.0/24
13.248.226.0/24
13.248.227.0/24
13.248.228.0/24
13.248.229.0/24
13.248.230.0/24
13.248.231.0/24
13.248.232.0/24
13.248.233.0/24
18.34.0.0/19
18.34.232.0/21
2600:1f68:8000::/39
2600:1fa0:8000::/39
2600:1ff0:8000::/39
2600:1ff8:8000::/40
2600:1ff9:8000::/40
2600:1ffa:8000::/40
3.5.0.0/19
44.192.134.240/28
44.192.140.64/28
52.216.0.0/15
54.231.0.0/16
76.223.100.0/24
76.223.101.0/24
76.223.102.0/24
76.223.103.0/24
76.223.104.0/24
76.223.95.0/24
76.223.96.0/24
76.223.97.0/24
76.223.98.0/24
76.223.99.0/24

 Allows the kiosk to communicate with media storage servers. These host the kiosk screensavers, images, and other UI elements of the kiosk software.
*.amazonaws.comTCP: 443 (HTTPS), TCP: 8883 (MQTT)Allows the kiosk to download updated software versions from application storage servers. 
mqtt.shoonyacloud.comTCP: 1883 (MQTT)Allows MQTT communication with the kiosk
services.shoonyacloud.comTCP: 443 (HTTPS)Provisioning services and Remote Viewer APK
turn.shoonyacloud.comTCP/UDP: 3478 (SCTP), TCP/UDP: 5349 (SCTP), UDP: 49152 - 65535For Remote Viewer and Remote Control services
dpcdownloads.esper.cloudTCP: 443 (HTTPS)For the 6-tap QR code method of provisioning and Remote Viewer APK
grubbrr.esper.cloudTCP: 443 (HTTPS)Grants access to the Esper Console when operating under a network with a restricted outbound firewall
grubbrr-api.esper.cloudTCP: 443 (HTTPS)For communicating from the device to the Esper Endpoint. (example: device status events and command success/failure messages)
mqtt-telemetry-prod.esper.cloudTCP: 1883 (MQTT)Deep telemetry from devices
13.52.132.230TCP: 40000 - 50000Allows secure remote ADB access to the kiosk

fcm.googleapis.com
firebaseinstallations.googleapis.com 

TCP: 443 (HTTPS), TCP: 5228 (HTTPS), TCP: 5229 (HTTPS), TCP: 5230 (HTTPS)Backup channel, also used for ping command to wake up a device (Only for GMS devices)

firebasestorage.googleapis.com

mqtt.googleapis.com
player.cloudfunctions.net
storage.googleapis.com
https://login.skykit.com/

443Enables Remote Assistance through Microtouch