# Port Reference In Dual DMZ configuration with HALB for Forwarding Parallels Secure Client Gateways and Multiple Parallels Secure Client Gateways, the redundant Parallels Publishing Agent and mixed desktop scenario, the following port are used: On the Firewall facing the Internet: TCP 80, 135, 445, 49179 UDP 80 (if RDP-UDP is enabled) TCP 443 (if SSL is enabled) UDP 443 (if SSL and RDP-UDP is enabled) TCP 3389 (if RDP Load Balancing is enabled) On the HALB appliance externally: TCP 80 TCP 443 (if SSL is enabled) On the HALB appliance internally: TCP 80 TCP 443 (if SSL is enabled) TCP 31006 UDP 31006 RAW 112 (VRRP) Forwarding Parallels Secure Client Gateways communicates via: TCP 80 UDP 80 (if RDP-UDP is enabled) TCP 443 (if SSL is enabled) UDP 443 (if SSL and RDP-UDP is enabled) TCP 3389 (if RDP Load Balancing is enabled) UDP 20000 (Gateway Lookup) UDP 20009 (if Client Manager is enabled) Parallels Secure Client Gateways communicates via: TCP 80 UDP 80 (if RDP-UDP is enabled) TCP 443 (if SSL is enabled) UDP 443 (if SSL and RDP-UDP is enabled) TCP 3389 (if RDP Load Balancing is enabled) UDP 20000 (Gateway Lookup) UDP 20009 (if Client Manager is enabled) TCP 20030 TCP 20020 (HTML5) Parallels Publishing Agents communicate via: TCP 20001 Redundancy Service. Communication with other Publishing Agents TCP 20002 Publishing Agent Service Port (communications with RAS Secure Client Gateways and the RAS Console) TCP 20003 Terminal Server Agent Port (communications with Terminal Server agents) TCP 20010 TCP 20030 Communication between Publishing Agents running in the same site Outbound TCP 443- Communication with Parallels Licensing Server (https://ras.parallels.com) TCP 30008 Publishing Agent (RAS Console and Reporting) TCP 50005 Parallels Client (Client Manager, shadowing) Parallels Terminal Server Agents communicate via: TCP 30004 Terminal Server Agent Communication Port UDP 30004 Terminal Server Agent Communication Port UDP 30004 Server for connection requests from PA TCP 30005 Server for internal commands (memshell) TCP 30004 Server for agent requests TCP 3389 Standard RDP Connections UDP 3389 Standard RDP Connections UDP 20003 TCP 30005 Terminal Server Agent Communication Port (Shell + Printer Redirector) Parallels VDI Agents communicate via: UDP 30004 Used when the VDI Agent is verified TCP 30006 VDI Agent Communication Port UDP 30006 VDI Agent Communication Port TCP 30007 VDI Agent Communication Port TCP 30009 VDI Agent Communication Port Parallels Remote PC Agents communicate via: UDP 30004 Remote PC Agent Communication Port TCP 30005, TCP 30004 TCP 3389 Standard RDP Connections UDP 3389 Standard RDP Connections Parallels Client communicates via: TCP 80 UDP 80 (if RDP-UDP is enabled) TCP 443 (if SSL is enabled) UDP 443 (if SSL and RDP-UDP is enabled) TCP 3389 Standard RDP Connections UDP 3389 Standard RDP Connections UDP 20009 Client Manager Internal Firewall Ports: Remote Install Push/Takeover of Software: TCP 135, 445, 49179 For Active Directory and Active Directory Domain Services Port Requirements see this article: https://technet.microsoft.com/en-us/library/dd772723%28v=ws.10%29.aspx For Remote Application Server firewall requirements, see this article: http://kb.parallels.com/en/123255