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Networking issues
Thanks to its robust security the AdderLink IP offers you great exibility in how
it integrates into an existing network structure. The AdderLink IP is designed
to reside either on an internal network, behind a rewall/router or alternatively
with its own direct Internet connection.
Positioning AdderLink IP in the network
Every network setup is different and great care needs to be taken when
introducing a powerful device such as the AdderLink IP into an existing
conguration. A common cause of potential problems can be in clashes with
rewall congurations. For this reason the AdderLink IP is designed to be
intelligent, exible and secure. With the minimum of effort the AdderLink IP
can reside either behind the rewall or alongside with its own separate Internet
connection.
Placing AdderLink IP behind a rewall
A possible point of contention between the AdderLink IP and a rewall can
occasionally arise over the use of IP ports. Every port through the rewall represents
a potential point of attack from outside and so it is advisable to minimise the
number of open ports. The AdderLink IP usually uses two separate port numbers,
however, these are easily changeable and can even be combined into a single port.
IMPORTANT: The correct conguration of routers and rewalls requires
advanced networking skills and intimate knowledge of the particular network.
Adder Technology cannot provide specic advice on how to congure your
network devices and strongly recommend that such tasks are carried out by a
qualied professional.
Port settings
As standard, the AdderLink 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 AdderLink IP correctly using only its network address. The rewall/router
must be informed to transfer trafc, requesting these port numbers, through to
the AdderLink IP.
When a web server is also on the local network
Port 80 is the standard port used by web (HTTP) servers. If the AdderLink IP is
situated within a local network that also includes a web server or any other device
serving port 80, then the HTTP port number of the AdderLink IP must be changed.
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 ‘200’ and the IP address is ‘192.168.47.10’
then browser users will need to enter:
http://192.168.47.10:200
(Note the single colon that separates the IP address and the port number).
The rewall/router would also need to be informed to transfer all trafc to the
new port number through to the AdderLink IP.
If you need to change the VNC port number
If you change the VNC port to anything other than 5900 (or 80), 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::11500
(Note the double colons that separate the IP address and port number).
The rewall/router would also need to be informed to transfer all trafc to the
new port number through to the AdderLink IP.
LOC REM VNC 100LNK PWR
Internet
LOC REM VNC 100LNK PWR
Internet
AdderLink IP situated
behind the rewall
KVM link to
host system
KVM link to
host system
Firewall/
router
AdderLink IP situated
alongside the rewall
Firewall/
router
Local
network
connection
Local
network
connection
IMPORTANT: When the AdderLink IP is accessible from the public Internet or dial
up connection, you must ensure that sufcient security measures are employed.