On Networks N150R User Manual - Manual (Page 43)

Security Settings
43
N150 WiFi Router (N150R)
- Time . This setting specifies the time of day to send the log. This is relevant when the
log is sent daily or weekly.
Note: If the Weekly, Daily, or Hourly option is selected and the log fills up
before the specified period, the log is automatically emailed to the
specified email address. After the log is sent, it is cleared from the
router’s memory. If the router cannot email the log file, the log buffer
might fill up. In this case, the router overwrites the log and discards
its contents.
Port Forwarding and Triggering
By default, the router blocks inbound traffic from the Internet to your computers except
replies to your outbound traffic. You might need to create exceptions to this rule for these
purposes:
• To allow remote computers on the Internet to access a server on your local network.
•
To allow certain applications and games to work correctly when your router does not
recognize their replies.
Your router provides two features for creating these exceptions: port forwarding and port
triggering. The next sections provide background information to help you understand how
port forwarding and port triggering work, and the differences between the two.
Remote Computer Access Basics
When a computer on your network needs to access a computer on the Internet, your
computer sends your router a message containing the source and destination address and
process information. Before forwarding your message to the remote computer, your router
has to modify the source information and create and track the communication session so that
replies can be routed back to your computer.
Here is an example of normal outbound traffic and the resulting inbound responses:
1. You open a browser, and your operating system assigns port number 5678 to this
browser session.
2. You type http://www.example.com into the URL field, and your computer creates a web
page request message with the following address and port information. The request
message is sent to your router.
Source address . Your computer’s IP address.
Source port number . 5678, which is the browser session.
Destination address
. The IP address of www.example.com, which your computer finds
by asking a DNS server.