Remote KVM devices KVM switch

there 2 types of remote kvm devices best described local remote , kvm on ip.

local remote (including kvm on usb)

local remote kvm device design allows users control computer equipment 1,000 feet (300 m) away user consoles (keyboard, monitor , mouse). need direct cable connection computer kvm switch console , include support standard category 5 cabling between computers , users interconnected switch device. in contrast, usb powered kvm devices able control computer equipment using combination of usb, keyboard, mouse , monitor cables of 5 metres (16 ft).

kvm on ip (ipkvm)

kvm on ip devices use dedicated micro-controller , potentially specialized video capture hardware capture video, keyboard, , mouse signals, compress , convert them packets, , send them on ethernet link remote console application unpacks , reconstitutes dynamic graphical image. kvm on ip subsystem typically connected system s standby power plane s available during entire bios boot process. these devices allow multiple computers controlled locally or globally use of ip connection. there performance issues related lan/wan hardware, standard protocols , network latency user management commonly referred near real time .

access remote or kvm on ip devices today use web browser can switch between 2 or more hard drives, although many of stand-alone viewer software applications provided many manufacturers reliant on activex or java.

security note: kvm chipsets or manufacturers require whitelisting or authority connect implicitly enabled. without whitelist addition, device not work. design , required connect non-standard usb devices kvm s. completed noting device id s (usually copied device manager in windows), or documentation manufacturer of usb device.

generally hid or consumer grade usb peripherals exempt, more exotic devices tablets, or digitisers or usb toggles require manual addition white list table of kvm.

in comparison conventional methods of remote administration (for example in-band virtual network computing or terminal services), kvm switch has advantage doesn t depend on software component running on remote computer, allowing remote interaction base level bios settings , monitoring of entire booting process before, during, , after operating system loads. modern kvm on ip appliances or switches typically use @ least 128-bit data encryption securing kvm configuration on wan or lan (using ssl).

kvm on ip devices can implemented in different ways. regards video, pci kvm on ip cards use form of screen scraping pci bus master kvm on ip card access , copy out screen directly graphics memory buffer, , result must know graphics chip working with, , graphics mode chip in contents of buffer can interpreted correctly picture data. newer techniques in opma management subsystem cards , other implementations video data directly using dvi bus. implementations can emulate either ps/2 or usb based keyboards , mice. embedded vnc server typically used video protocol in ipmi , intel amt implementations.