Appendix B: Tcp And Udp Ports; Dsr Switch And Ds1800 Digital Switch Ports - Avocent DSView 3 Installer/User Manual

310 DSView 3 Software Installer/User Guide

Appendix B: TCP and UDP Ports

The DSView 3 software client accesses the server and performs commands using a standard web
browser. The communication protocol used between the client web browser and the 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
Server Properties on page 49.
DSView 3 software clients may communicate with the DSView 3 software 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.
When data logging is used, the SSH server port, 4122, must be configured as open on your firewall.

DSR switch and DS1800 digital switch ports

A user may initiate a KVM session with a target device on a DS1800 digital switch 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 software 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 DS1800 digital switch 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 DS1800 digital switch or DSR switch. Figure B.1
illustrates the ports used with a non-proxied DS1800 digital switch or DSR switch connection.
UDP port 3211 is used by the DSView 3 software server to initialize the IP configuration of
DS1800 digital switches and DSR switches. TCP/IP port 3211 is also used by the DSView 3
software server to perform management functions on DS1800 digital switches 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. See Color depth on page 205.