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Port Settings
The Port Settings screen is where you can setup the following items:
•
Port Forwarding
•
Port Triggering
•
DMZ Host
As stated previously, most users will never need to change these settings. However, if you are running
certain applications (such as an FTP server or a web server) or playing online video games you may need to
adjust settings in this section. Not all Internet applications require changes to the port settings. As a general
rule of thumb, if your application or device worked fine when connected directly to your modem but does not
work when connected behind your V-Portal, you may need to customize port settings.
Although not required, we recommend you assign a static IP address to the PC when implementing Port
Forwarding or a DMZ Host. This will prevent the situation where your port settings may stop working and
need to be reassigned as a result of your PC receiving a new IP address. For example, if DHCP is enabled
on your PC and there is a power failure, when the power comes back on the PC may have a different IP
address. All of your port settings will stop functioning. Assigning a static IP address eliminates this
possibility.
Let's take a closer look at each of these.
Port Forwarding
Port Forwarding is a technique where incoming packets destined for a specific port on a machine are re-
directed or 'forwarded' to a different port and/or machine. Network clients do not know that port forwarding is
being done. It is all done transparently.
Port Forwarding is used when you want to provide public access to services running on your private LAN
(such as a web server, e-mail server or FTP server). When a firewall is enabled, certain ports on a LAN may
be blocked. Port forwarding allows incoming traffic from the Internet and directs it to specific services on
your LAN based on the configured IP address and port number. In other words, requests from users are
sent to your network via the Internet, and the V-Portal will forward these requests to the appropriate port on
the PC.
The specific port forwarding rules you need to implement will be detailed in the applications' documentation.
For your convenience, we have included a table of commonly used port numbers below.
View the Terms of Service by visiting the Vonage website at www.vonage.com/tos. Pay particular attention to
Section 11 which explains limitations on Warranty, Remedy and Liability.
Vonage V-Portal User Guide
Service
Protocol
HTTP
TCP
FTP
TCP
TFTP
UDP
SMTP
Both
POP3
TCP
NNTP
TCP
Telnet
Both
IRC
TCP
SNMP
Both
Finger
TCP
Gopher
TCP
Whois
TCP
Rtelnet
TCP
LDAP
Both
UUCP
TCP
Port Number
80
21
69
25
110
119
23
194
161
79
70
43
107
389
540
40
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