User guide

426 DSView Installer/User Guide
Appendix B: TCP Ports
The DSView Client accesses the DSView Server and perform commands using a standard web
browser. The communication protocol used between the DSView Client web browser and the
DSView Server is the HTTPS protocol. By default, TCP/IP port 443 is used for HTTPS
connections, but you may change the port using the DSView Server Network Properties window.
NOTE: The port used for the HTTPS connection may be changed using the DSView Server Network Properties
window. The HTTPS port must be specified in the web browser URL if changed from the default (port 443). See
Hub DSView Server Properties on page 56 for more information.
DSView Clients may communicate with the DSView Server through a standard connection or
using a proxy server. By default, TCP/IP port 1078 is used for proxied connections. If a proxy
connection has not been created, TCP ports 22, 2068 and 8192 must be configured as open on
your firewall.
DSR switch ports
A DSView user may initiate a KVM session with a target device on a 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 DSView Client contacts the DSView Server, which checks the permissions of the target
device. If the logged in DSView user has permissions to establish Video Viewer sessions to the
selected target device, the DSView Server will establish a connection to the DSR switch using
TCP/IP port 3871 to authorize the session. The KVM data is sent to the 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 DSView Client to the DSR switch. Figure B.1 illustrates the
ports used with a non-proxied DSR switch connection.
UDP port 3211 is used by the DSView Server to initialize the IP configuration of DSR switches.
TCP/IP port 3211 is also used by the DSView Server to perform management functions on 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 Gray Scale) use less network bandwidth than others (such a
Best Color), changing the color settings may increase video performance. For optimal video performance over a
slower network connection, a color setting such as Gray Scale/Best Compression or Low Color/High
Compression is recommended. See Adjusting color depth on page 251 for more information.