65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: +359 56/820027, Fax: +359 56/836700
E-mail: office@devabroadcast.com
Web: www.devabroadcast.com
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IP ROUTER AND PORT TRANSLATION
Now that broadband Internet connections are so common and NAT routers are more widespread
than ever, your connection to the Internet might be going through a NAT
router
or a
firewall
. If
you have a home network or DSL service, you’re likely to have one of these. These devices can
improve the security of your computer, and can allow a single Internet address to be shared by
more than one computer on your network.
NAT stands for
network address translation
and allows multiple computers or devices to access
the internet through a single internet connection and single IP address. The computers or devices
on the inside of the network, known as an intranet, are given IP addresses that are non-routable
(meaning non-internet addresses). The router translates the outgoing requests from your computer
or device into requests from the single IP address on the WAN (or Internet side of the router). On
the other hand the router will NOT forward requests originating from the outside of the network
and pass them on to the local network
unless very specifically configured to do so
.
On the picture below is presented an example of DB8000 to router connection:
In this way, the hardware router, designed not to permit any unsolicited packets from an external
host to be delivered to an internal host acts as a router firewall and can be a problem for client
programs to reach your distant Deva Broadcast’s device.
The solution to this problem is to configure the
port forwarding
feature of the router to allow
certain packets to reach the Deva Broadcast’s device. Аs each make and model of router has a
different procedure for setting up port forwarding, please refer to the specific router’s manual for
guidance and further details. Usually the port forwarding can be done in the NAT section from the
router’s menu.
Required ports for Server and Client services and applications
The following list shows the ports that must be open on your router or firewall to allow specific
types of data flows through the router:
Port Description
DB8000 Defaults
FTP Command Port
21
FTP Data Port
20
NOTE:
If you customize the DB8000 FTP ports, please consider the same port values must be
used to configure router’s forwarding.
