In order for Skype for Business to function properly, the following network ports need to be open OUTBOUND through the network firewall.
| Port | Protocol | Direction |
| 443 | TCP | Outbound |
| 3478 | TCP/UDP | Outbound |
| 5061 | TCP | Outbound |
| 50000-59999 | TCP/UDP | Outbound |
Our IP Addresses are as follows. We would recommend allowing all IP's through your firewall. This will allow your users to utilise local resources if they host meetings closer to a different region.
Global:
185.94.204.0/22**
35.176.92.0 - 35.176.92.15*
2a04:e9c0::/29
North America (California):
13.56.32.160 - 13.56.32.175*
2600:1f1c:353:7600::/56
Asia Pacific (Singapore):
13.228.64.64 - 13.228.64.79*
2406:da18:c3c:cc00::/56
Asia Pacific (Sydney):
103.116.111.0/24
2001:df5:5100::/48
*Please note, these are ranges of IP's and not subnet's. The IP's are therefore inclusive.
**If your organisation utilises VIA Connect, we will only advertise to you and you should only route this subnet to us.
Our URL's:
*.unifiedcaas.net
*.joinvia.com
*.via.co.uk