Cisco Collaboration: Cisco CallManager Express (CME) SIP Trunking - Route XP Private Network Services
![SIP Trunk and SIP Phones coming in over VPN - Network Protection: Firewall, NAT, QoS, & IPS - UTM Firewall - Sophos Community SIP Trunk and SIP Phones coming in over VPN - Network Protection: Firewall, NAT, QoS, & IPS - UTM Firewall - Sophos Community](https://community.sophos.com/cfs-file/__key/telligent-evolution-components-attachments/13-15-00-00-00-00-03-01/Screen-Shot-2013_2D00_11_2D00_12-at-18.40.32.png)
SIP Trunk and SIP Phones coming in over VPN - Network Protection: Firewall, NAT, QoS, & IPS - UTM Firewall - Sophos Community
![Peer Sip Trunk with two UCM 6510 with Site to Site VPN in Sophos - UCM62xx/UCM6510 IP PBX Appliance - Peer Sip Trunk with two UCM 6510 with Site to Site VPN in Sophos - UCM62xx/UCM6510 IP PBX Appliance -](https://forums.grandstream.com/uploads/default/original/2X/6/633f72de878b9b3f9913e31c35404a4958570202.png)
Peer Sip Trunk with two UCM 6510 with Site to Site VPN in Sophos - UCM62xx/UCM6510 IP PBX Appliance -
![SIP Firewall Rules - Phones cant reach SIP server - Network Protection: Firewall, NAT, QoS, & IPS - UTM Firewall - Sophos Community SIP Firewall Rules - Phones cant reach SIP server - Network Protection: Firewall, NAT, QoS, & IPS - UTM Firewall - Sophos Community](https://community.sophos.com/cfs-file/__key/telligent-evolution-components-attachments/00-54-00-00-00-04-19-40/UTM-FW-Manual-Rules.png)
SIP Firewall Rules - Phones cant reach SIP server - Network Protection: Firewall, NAT, QoS, & IPS - UTM Firewall - Sophos Community
![SIP Trunk and SIP Phones coming in over VPN - Network Protection: Firewall, NAT, QoS, & IPS - UTM Firewall - Sophos Community SIP Trunk and SIP Phones coming in over VPN - Network Protection: Firewall, NAT, QoS, & IPS - UTM Firewall - Sophos Community](https://community.sophos.com/cfs-file/__key/telligent-evolution-components-attachments/13-15-00-00-00-00-03-03/Screen-Shot-2013_2D00_11_2D00_12-at-19.25.49.png)