Lindy Switch manual Networking issues, Positioning Lindy KVM IP in the network, Port settings

Networking issues

Thanks to its robust security the LINDY KVM IP offers you great flexibility in how it integrates into an existing network structure. The LINDY KVM IP is designed to reside either on an internal network, behind a firewall/router or alternatively with its own direct Internet connection.

Positioning LINDY KVM IP in the network

Every network setup is different and great care needs to be taken when introducing a powerful device such as the LINDY KVM IP into an existing configuration. A common cause of potential problems can be in clashes with firewall configurations. For this reason the LINDY KVM IP is designed to be intelligent, flexible and secure. With the minimum of effort the LINDY KVM IP can reside either behind the firewall or alongside with its own separate Internet connection.

Internet Internet

Firewall/ router

Firewall/ router

Placing LINDY KVM IP behind a router or firewall

A possible point of contention between the LINDY KVM IP and a firewall can occasionally arise over the use of IP ports. Every port through the firewall represents a potential point of attack from outside and so it is advisable to minimise the number of open ports. The LINDY KVM IP usually uses two separate port numbers, however, these are easily changeable and can even be combined into a single port.

IMPORTANT: The correct configuration of routers and firewalls requires advanced networking skills and intimate knowledge of the particular network. LINDY cannot provide specific advice on how to configure your network devices and strongly recommend that such tasks are carried out by a qualified professional.

Port settings

As standard, the LINDY KVM IP uses two ports to support its two types of viewer:

•Port 80 for users making contact with a web browser, and

•Port 5900 for those using the VNC viewer.

When these port numbers are used, VNC viewers and web browsers will locate the LINDY KVM IP correctly using only its network address. The firewall/router must be informed to transfer traffic, requesting these port numbers, through to the LINDY KVM IP.

When a web server is also on the local network

Port 80 is the standard port used by web (HTTP) servers. If the LINDY KVM IP is situated within a local network that also includes a web server or any other device serving port 80 then, if you want to use the web browser interface from outside the local network environment, the HTTP port number of the LINDY KVM IP must be changed.

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IP

Access Switch Plus

LOC REM VNC 100 LNK PWR

KVM link to host system

IP

Access Switch Plus

LOC REM VNC 100 LNK PWR

	Local	KVM link to
	network
		host system
Local	connection
network
connection

When you change the HTTP port to anything other than 80, then each remote browser user will need to specify the port address as well as the IP address. For instance, if you set the HTTP port to ‘8000’ and the IP address is ‘192.168.47.10’ then browser users will need to enter:

http://192.168.47.10:8000

(Note the single colon that separates the IP address and the port number).

The firewall/router would also need to be informed to transfer all traffic to the new port number through to the LINDY KVM IP.

If you need to change the VNC port number

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LINDY KVM IP situated	LINDY KVM IP situated
behind the firewall	alongside the firewall

IMPORTANT: When the LINDY KVM IP is accessible from the public Internet or dial up connection, you must ensure that sufficient security measures are employed.

If you change the VNC port to anything other than 5900, then each VNC viewer user will need to specify the port address as well as the IP address. For instance, if you set the VNC port to ‘11590’ and the IP address is ‘192.168.47.10’ then VNC viewer users will need to enter:

192.168.47.10::11590

(Note the double colons that separate the IP address and port number).

The firewall/router would also need to be informed to transfer all traffic to the new port number through to the LINDY KVM IP.

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