NETGEAR RangeMax™ Dual Band Wireless-N Router WNDR3300 Reference Manual

“When you initiate a session with destination port 6667, you must also allow incoming traffic on port 113 to reach the originating computer.” Using steps similar to the preceding example, the following sequence shows the effects of the port triggering rule that you have defined:

1.You open an IRC client program, beginning a chat session on your computer.

2.Your IRC client composes a request message to an IRC server using a destination port number of 6667, the standard port number for an IRC server process. Your computer then sends this request message to your router.

3.Your router creates an entry in its internal session table describing this communication session between your computer and the IRC server. Your router stores the original information, performs Network Address Translation (NAT) on the source address and port, and sends this request message through the Internet to the IRC server.

4.Noting your port triggering rule, and having observed the destination port number of 6667, your router creates an additional session entry to send any incoming port 113 traffic to your computer.

5.The IRC server sends a return message to your router using the NAT-assigned source port (as in the previous example, let’s say port 33333) as the destination port. The IRC server also sends an “identify” message to your router with destination port 113.

6.Upon receiving the incoming message to destination port 33333, your router checks its session table to determine whether there is an active session for port number 33333. Finding an active session, the router restores the original address information replaced by NAT and sends this reply message to your computer.

7.Upon receiving the incoming message to destination port 113, your router checks its session table and learns that there is an active session for port 113, associated with your computer. The router replaces the message’s destination IP address with your computer’s IP address and forwards the message to your computer.

8.When you finish your chat session, your router eventually senses a period of inactivity in the communications. The router then removes the session information from its session table, and incoming traffic is no longer accepted on port numbers 33333 or 113.

To configure port triggering, you need to know which inbound ports the application needs. Also, you need to know the number of the outbound port that will trigger the opening of the inbound ports. You can usually determing this information by contacting the publisher of the application or user groups or newsgroups.

Note: Only one computer at a time can use the triggered application.

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Fine-Tuning Your Network

v1.0, February 2008

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NETGEAR WNDR3300 manual V1.0, February
Page 71 Page 73

WNDR3300 specifications

The NETGEAR WNDR3300 is a versatile and powerful wireless router designed to deliver reliable network performance for homes and small offices. Launched as part of NETGEAR's popular RangeMax series, the WNDR3300 encompasses several advanced technologies to ensure robust connectivity and seamless internet access for multiple devices.

One of the standout features of the WNDR3300 is its dual-band capability. Supporting both the 2.4 GHz and 5 GHz frequency bands, the router enables users to connect multiple devices without interference. The 2.4 GHz band offers broader coverage and is ideal for basic web browsing and email, while the 5 GHz band is designed for high-bandwidth activities such as video streaming and online gaming. This dual-band operation helps to alleviate congestion, improve performance, and enhance the overall user experience.

With its 802.11n wireless technology, the WNDR3300 boasts impressive speeds of up to 300 Mbps. The router utilizes MIMO (Multiple Input Multiple Output) technology, which employs multiple antennas for both transmitting and receiving signals, resulting in improved range and coverage. This technology is particularly beneficial in larger homes where traditional single-antenna routers might struggle to provide strong signals in distant rooms.

Another significant aspect of the WNDR3300 is its built-in firewall and security features. The router offers WPA/WPA2 encryption, which protects users from unauthorized access and secures personal data while browsing. Additionally, the router includes parental control features, enabling users to manage their family's internet usage effectively. These controls allow for the restriction of specific websites, scheduling of internet access times, and monitoring of online activity.

The WNDR3300 also includes several Ethernet ports, allowing for wired connections to desktops, gaming consoles, and other devices. With four LAN ports, users can easily connect multiple devices for stable and high-speed internet access. Moreover, the router supports dynamic DNS and VLAN support, making it a suitable option for advanced users looking to customize their network setup.

Installing and configuring the WNDR3300 is straightforward, thanks to its user-friendly web interface. NETGEAR also provides a WPS (Wi-Fi Protected Setup) button, allowing users to connect devices securely with just a push of a button, simplifying the connection process.

In conclusion, the NETGEAR WNDR3300 is an excellent choice for users seeking a reliable and fast wireless networking solution. With its dual-band capabilities, advanced security features, and user-friendly setup, it effectively meets the demands of modern internet usage, making it a valuable addition to any home or small office network.
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