Hosted Lync Firewall Ports for Client Networks
When using Thinktel's Hosted Lync 2010 version, you need to allow the below IP/Ports.
These are the ports we use for all ca1.hostedlync.com users.
Outbound port 443 (TCP) to IP 126.96.36.199
Inbound and Outbound port 5061 to/from IP 188.8.131.52
Outbound port 443 (TCP) to IP 184.108.40.206
Outbound port 3478 (TCP/UDP) to IP 220.127.116.11
Inbound and Outbound port 3478 (TCP/UDP) to/from IP 18.104.22.168
Inbound and Outbound ports 50,000-59,999 (TCP/UDP) to/from IP 22.214.171.124