Port triggering is a configuration option on a NAT-enabled router which allows a host machine to dynamically and automatically forward a specific port back to itself with port forwarding. In layman’s terms port triggering opens an incoming port when your computer is using a specified outgoing port for specific traffic.

So if you use a game that goes out and port 99922 and wants to come back in on 2222 when your router sees outbound traffic on 99922 it automatically opens port 2222 to your P.C. This is more secure than port forwading because it doesn’t leave the port open to internet traffic all of the time!

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Port forwarding (sometimes referred to as tunneling) is the act of forwarding a network port from one network node to another. This technique can allow an external user to reach a port on a private IP address (inside a LAN) from the outside via a NAT-enabled router.

Port forwarding allows remote computers (e.g. public machines on the Internet) to connect to a specific computer within a private LAN.

For example:

• forwarding ports 80 or 443 to run an HTTP webserver
• forwarding port 22 to allow Secure Shell access
• forwarding port 21 to allow FTP access

Modern Linux machines achieve this by adding iptables rules to the nat table: with target DNAT to the PREROUTING chain, and/or with target SNAT in the POSTROUTING chain.

BSD and Mac OS X machines use a similar tool named ipfw. The ipfw tool is likely already running as a built-in part of your operating system’s kernel.

Some common caveats with port forwarding include:

• The need to forward the packets that come to the router’s forwarded port as well as the need to rewrite them so that the machine to which the port is forwarded can reply to the original source address, which in turn leads to the inability of the destination (private) machine to see the actual originator of the forwarded packets, and instead see them as if originating from the router
• Only one networked machine can use one forwarded port at one time
• Traditional port forwarding allows the entire world access to the forwarded port, reducing network security slightly

Port forwarding can also be used within a single machine. Port forwarding is necessary for a standalone computer if any of the following conditions are true:

• The computer is using a shared IP address.
• Internet Connection Sharing is enabled.
• A router is being used with NAT enabled.

In a typical home networking setup, internet access is through a DSL or Cable modem. That modem may be connected to a router, which is then connected to the networked computers by Ethernet or WiFi. The router is the device that the Internet sees; it holds the public IP address. The computer behind the router, on the other hand, is invisible to the Internet as it holds a local IP address. Port forwarding is necessary in the router because computers will send information directed to the public IP address and the router needs to know where to send that information.

Port forwarding is commonly done on Unix-derived computers where port numbers numbered below 1024 can only be accessed by software running as the root user. Running as root can be a security risk, so some people use port forwarding to redirect incoming traffic from a low numbered port to software listening on a higher port. For example, a web server may be listening on a port such as 8080 for traffic redirected from the restricted port 80.

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Port forwarding is call port-by-pass in the speedstream 6520????router series.

IMPORTANT: IN ORDER FOR PORT FORWARDING TO WORK IN THE SIEMENS SPEEDSTREAM SERIES UPnP NEEDS TO BE TURNED OFF!

I dont know why apparaently niether does siemens or my ISP….

1. Select Port By-Pass (NAPT) from the “Address Translation (NAT/NAPT)” window.
2. Click the Configure hyperlink next to Port By-Pass (NAPT). This displays the “Port-By-Pass
Configuration” window.

3. To enable an application for NAPT, click the desired application from the Available Applications
list. The application is moved to the Enabled Applications list.
4. Optionally, click the Add a custom bypass entry hyperlink. This displays the advanced features on
the Port By-Pass Configuration” window. The advanced option allows you to configure special port
access to the Internet.

5. Do one of the following:

??????????????? Select one of the following services from the Select service by name drop-down menu.
????
-Telnet
Telnet is a program that allows you to connect to other computers over the Internet. This
options uses port 23.

-FTP (File Transfer Protocol)
FTP is used to transfer files in both ASCI and Binary format between local and remote
devices. This option uses port 21.

-HTTP (Hyper Text Transfer Protocol)
HTTP is the standard method of transferring all types of information over the Internet. This
option uses port 80.
????
-SNMP (Signaling Network Management Protocol)
SNMP is a protocol used by network management applications to help manage a network.
This option uses port 161.

-SMTP (Simple Mail Transfer Protocol)
SMTP is used for sending email between servers. This port uses port 25.

-PPTP (Point-to-Point Tunneling Protocol)
PPTP is a protocol that allows VPN (Virtual Private Network) applications. This option uses
port 1723.

-Domain
Domain is used for DNS options. This option uses port 53.

??????????????? Select a protocol from the Select Protocol drop-down menu. This can be one of the following:

-TCP (Transmission Control Protocol)
Provides reliable, sequenced, and unduplicated delivery of bytes to a remote or local user.

-UDP (User Datagram Protocol)
A connectionless mode protocol that provides the delivery of packets to a remote or local
user.

-ICMP (Internet Control Message Protocol)
A method by which IP software on a host or Gateway can communicate to pass information
to other machines.

-GRE (Generic Routing Encapsulation)
This protocol is used to provide tunneling for a VPN connection.

6. If you selected a protocol, type the range of UDP or TCP ports in the appropriate boxes.

7. Select one of the following options:

??????????????? Redirect selected protocol/service to this router
The protocol or service that you select is directed to your Gateway.

??????????????? Redirect selected protocol/service to IP Address
The protocol or service that you select is directed to an IP address on your LAN that you type in
the box next to this field.

8. Click Apply.

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If you forgot your password…………hold in the button on the bottom of the router for 10 seconds.

Your user/password is now probably

admin……………..password

admin……………..admin

admin……………..wirelessdsl

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I have run in to the problem of my speedstream 6520 running slow after a massive file transfer or download. I am not sure why it does this my hypothesis is that it has a caching issue. The only way I have figured to get around this is to reboot or reset the router.

Sorry guys!

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