To ensure full access to the app and to meet the security requirements, the following IP addresses/domains should be whitelisted in the firewall:

IPv4:

• 20.52.214.40
• 20.170.3.149
• 20.113.162.111 (from 08/19/23)

TCP/80 (only for redirects) TCP/443 (HTTP 1.1 and HTTP 2!)

• .flipcorp.de
• .flip-app.com
• .flipcms.de
  
  
• *.getflip.com
• *.getflip.email
• *.getflip.cloud
• *.getflip.dev
• *.getflip.link

Open ports 5228, 5229, 5230 for Firebase communication.
Opened communication at proxy level between the source server and following URLs:

• fcm.googleapis.com
• gcm-http.googleapis.com
• accounts.google.com
• flipnext-prod.firebaseio.com
  
  

Apple APNs:

• https://support.apple.com/en-gb/HT203609
  
  

Source IP: <intern>
Destination HOST/IP : meet.flipapp.de / IPv4: 142.132.155.149 and IPv6: 2a01:4f8:261:2b5a::f0
TCP/80
TCP/443
TCP/5349
UDP/10000
UDP/3478

Push-Notifications

• *.flipcorp.de
• https://device-provisioning.googleapis.com/checkin
• https://firebaseinstallations.googleapis.com
• https://fcmtoken.googleapis.com/register
• https://iid.googleapis.com/iid/register
• https://fcmregistrations.googleapis.com