This note details the DSView 3.x software configuration when going through a firewall.
In a typical network configuration, the DSView software client is located outside of the firewall and the DSView server and managed appliances reside inside the firewall. In this case, the firewall must be configured to allow two TCP/IP ports inside the firewall.
The first TCP port (Default=443) is used for the HTTPS web browser connection between the DSView software client and the DSView software server. The second TCP port (Default=1078) is used for the Avocent Proxy Protocol (Tunnels Video and Telnet traffic). Both ports are configurable.
Avocent recommends the following:
Place the DSView software server and all managed appliances within the same firewall Demilitarized Zone (DMZ). If the managed appliances are not in the same DMZ with the DSView server, configure the firewall so all data may pass between the zones using TCP/IP ports 22 (SSH), 3211, 2068, 8192 and 3871. The User Datagram Protocol (UDP) port 3211 must also be configured so it may pass through the firewall for initial network discovery of appliances that do not have an IP address.
DSR switch and Dell digital switch ports
A user may initiate a KVM session with a target device on a Dell or DSR switch by clicking KVM Session for the appropriate target device or by clicking the KVM Session icon or text from a Unit Overview window. The client contacts the DSView 3 server, which checks the permissions of the target device. If the logged in user has permissions to establish Video Viewer sessions to the selected target device, the server will establish a connection to the Dell or DSR switch using TCP/IP port 3871 to authorize the session. The KVM data is sent to the DS1800 digital switch or DSR switch using ports 8192 and 3871. Port 8192 contains the video portion of the KVM data. Port 2068
contains the keyboard and mouse portion of the KVM data. In a non-proxied connection, the video data from port 8192 and the keyboard and mouse data from port 2068 are sent directly from the client to the Dell or DSR switch. Figure B.1 illustrates the ports used with a non-proxied Dell or DSR switch connection. UDP port 3211 is used by the DSView 3 server to initialize the IP configuration of DS1800 digital switches and DSR switches. TCP/IP port 3211 is also used by the DSView 3 server to perform management functions on Dell and DSR switches, such as configuring settings.
NOTE: When using a non-proxied connection, video performance over a slower network connection may be less than optimal. Since certain color settings (such as grayscale) use less network bandwidth than others (such as
Best Color), changing the color settings may increase video performance. For optimal video performance over a slower network connection, a color setting such as grayscale/Best Compression or Low Color/High Compression is recommended.
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