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Placing AdderView CATxIP 5000 behind a router or firewallA possible point of contention between the AdderView CATxIP 5000 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 AdderView CATxIP 5000 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.
Adder Technology 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 AdderView CATxIP 5000 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 AdderView CATxIP 5000 correctly using only its network address. The
firewall/router must be informed to transfer any traffic requesting these port
numbers through to the AdderView CATxIP 5000.
When a web server is also on the local network
Port 80 is the standard port used by web (HTTP) servers. If the AdderView
CATxIP 5000 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 AdderView CATxIP 5000 may need to 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 ‘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 AdderView CATxIP 5000.
If you need to change the VNC port number
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 AdderView CATxIP 5000.
Addressing
When the AdderView CATxIP 5000 is situated within the local network, you
will need to give it an appropriate local IP address, IP network mask and default
gateway. This is achieved most easily using the DHCP server option which
will apply these details automatically. If a DHCP server is not available on the
network, then these details need to be applied manually in accordance with the
network administrator.
The firewall/router must then be informed to route incoming requests to port
5900 or port 80 (if available) through to the local address being used by the
AdderView CATxIP 5000.
LOCREMVNC 100 LNK PWR
www.adder.com
Internet
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AdderView CATxIP 5000 has
a local address and net mask,
i.e.
IP address: 192.168.0.3
Net mask: 255.255.255.0
Remote user with VNC viewer
accesses IP address: 129.7.1.10
and automatically uses port
5900.
Firewall/router address:
129.7.1.10
The firewall routes the
request from the VNC viewer
on port 5900 through to the
AdderView CATxIP 5000 at
local address 192.168.0.3