Nokia A032 - Page 208

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Nokia A032 Advanced User Guide
For each NAT hole, you need to specify the
following:
As an example, if you set the following NAT
hole parameters:
Port number: 80
Name: WWW
Protocol: TCP
IP address: 192.168.0.77
and your static external IP address is 200.1.2.3,
an external user would enter the following
URL:
http://200.1.2.3
but would actually access port 80 on machine
with IP address 192.168.0.77. The NAT firewall
would make the required address translation.
Parameter Description
Port number
Here are some well-known port
assignments:
• 21 – FTP
• 23 – Telnet
• 25 – SMTP
• 53 – DNS
• 68 – BOOTP
• 69 – TFTP
• 80 – WWW
• 110 – POP3
• 162 – SNMP
Protocol The protocol to be used (e.g. TCP).
IP Address The IP address of the machine hosting
the service on your local network.
The port number
selects the required
service and
distinguishes, for
example, Web server
requests from FTP
requests.
A032-Adv.book Page 202 Monday, November 13, 2000 10:47 AM