Avocent SPC420 manual Appendix B TCP and UDP Ports, KVM switch ports

356DSView 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 59.

DSView 3 software clients may communicate with the DSView 3 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, and the Syslog server port, 4514, must be configured as open on your firewall.

NOTE: You can change the SSH server port and Syslog server port. See Enabling the SSH server on page 187 and Enabling the Syslog server on page 187.

KVM switch ports

A user may initiate a KVM session with a target device on a KVM 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 KVM switch using TCP/IP port 3871 to authorize the session. The KVM data is sent to the KVM 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 KVM switch. Figure B.1 illustrates the ports used with a non-proxied KVM switch connection.

UDP port 3211 is used by the DSView 3 server to initialize the IP configuration of KVM switches. TCP/IP port 3211 is also used by the DSView 3 server to perform management functions on KVM 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 258.