Any Computer Issue

Monday, September 04, 2006

Speed

BSNL, Calcutta Telephones Free Broadband Speed Checker.

Your current bandwidth reading is:

215.30kbps

which means you can download at 26.91 KB/sec. from www.calcuttatelephones.com server located at Territa Bazar, Kolkata.

28.8 kbps dial-up
33.6 kbps dial-up
53.3 kbps dial-up
56 kbps ISDN
128 kbps ISDN
215.3 kbps My Connection
256 kbps BROADBAND
384 kbps DSL
768 kbps DSL
1000 kbps DSL
1500 kbps DSL/T1/Cable Modem

UPnP is Cool!!

If you want to use UPnP you have to open it, not close, like some people suggested, right

You have Green light because you forwarded port.
You get "Unable to map UPnP", because obviously your UPnP is closed. Ok, OPEN it then.

With UPnP opened, you DO NOT need to forward port at all.

UPnP allows dynamically open/close ports required for uTorrent (or another UPnP enabled app)

If your modem supports Upnp, goto Windows XP firewall setting, check(open) UPnP Framework. Make sure UPnP is enabled in uTorrent.

That's it.

I found that with UPnP downloads are much faster (and you don't have to mess with your modem forwarding a port).

By Slishnevsky.

Port Forwarding Problems and uPnP

Typed http://192.168.1.1 >admin>password. Clicked on Advance>Virtual Server. So far so good but then it says "“You must enter an IP address on Lan Clients page to enter this setup”.". This wasn't mentioned on Portforwarding.com. To take care of this error:

Lan settings> Ip address from TCP/IP properties of your Network connections (192.168.1.3 for me). Host= Anyname.

Make sure DHCP is set to static, as static IP is required for Port Forwarding. We need the router to manually assign an IP address for the PC.

Note: SSDP Discovery Service enables discovery of UPnP devices on your home network. UPnP Port Works ("UPnPPW") - b1.0a (Beta) 50K software can be used for modifying or viewing port forwarding entries.

URL: http://www.UPnPworks.alcidelic.com/

Gyan- Upnp protocol allows devices to communicate with each other without your intervention. Upnp is not supported by all routers and even when it is supported, it comes with its own problems!

When the settings made on DLink Homepage is not saved, make sure you use, the save and reboot feature in Miscellaneous section. You can also save your settings by exporting it. This way you dont have to reconfigure everything while customizing connections.

Rinku

Demilitarize Zone DMZ

If you setup ur Static IP as 192.168.1.3, your PC still uses the Gateway of 192.168.1.1 to access the Internet. But if you enable DMZ, your PC is no longer hidden. Use DMZ mode in the router as a last resort if applications are not connecting to the Internet.

Rinku

Action Files Photoshop

Action files .atn can be just dragged and drop in the Action Pallete.

How to open ports- DLink DSL 502T

How to open ports (DLink DSL 502T Firmware v2.xx)

Step 1 Open your web browser and enter the IP address of the router (10.1.1.1). Enter user name (admin) and your password (admin).

Step 2 Add LAN Client (Workstation) into the router before you can open any ports. Go to Advanced > LAN Clients. Type in the IP address of the Workstation (e.g. 10.1.1.2). You can specify the name of this workstation under Host Name (optional). Click Add and then Apply.

Step 3 Go to Advanced > Virtual Server (Port Forwarding). There is a list of pre-set ports in the router which you can choose from.

Step 3a If your specific application is not listed there, you can add the necessary ports yourself (Select the 'User' Category and click on Add button below).

Step 3b Enter the name for this entry under Rule Name. Then select the necessary protocol. If there is a range of ports to open, specify the starting port under Port Start and the ending port under Port End. If you need to open just one port, specify this port number in all fields including the Port Map. Click Apply.

Step 4. Go to Advanced > Virtual Server and under LAN IP select your LAN Client (which we added in Step 2). This is the computer where the required traffic will be redirected to. Select the Category and the desired Rule or select "User" Category and you should see the rule which you have created in Step 3b. Select it and then click on Add > to move it to Applied Rules section. Click Apply .

Step 5 (Optional) If you are opening ports for FTP, Telnet or other service, please make sure this service is not additionally blocked by the router's firewall. You can verify this under Advanced > Firewall > Service Filtering.

Step 6 To save the new settings into the router's memory go to Tools > (System) > Save & Reboot. Click on Save & Reboot button. The router will save the settings and restart.

Because our routers use NAT (Network Address Translation), you can only open a specific port to one computer at a time. For example: If you have 2 web servers on your network, you cannot open port 80 to both computers. You will need to configure 1 of the web servers to use port 81. Now you can open port 80 to the first computer and then open port 81 to the other computer.

Note that the computer/device you are opening ports for should have static IP:
Under Control Panel > Network Connections > Local Area Connection > Properties > Internet protocol TCP/IP > Properties:
IP address: 10.1.1.5 (each computer will require a different IP)
Subnet mask: 255.0.0.0
Gateway: 10.1.1.1
DNS: 202.129.64.198 (or whichever your provider is using)

Please note that from inside your LAN you will not be able to access your server using its public IP address or name. On your LAN you will need to use its local IP address instead (10.1.1.2).

Be aware that many Internet Providers are blocking commonly used ports like 80 and 21, hence you will not be able to host a WEB site or FTP site even if you will open the necessary ports in the router.

needs edit

DMZ is an option that most routers have that basically forwards every port to one IP. Try using it and see if that works.

UPnP Port Forwarding
I've been recently researching UPnP Port Forwarding support for Peer Impact and here are some of my findings.

Between 60-75% of the users on the Peer Impact network are behind some kind of firewall whether it is a software application like Zone Alarm running on a user’s PC or a hardware device like a D-Link home router that is connected to a user’s PC. The job of those applications are to block any incoming network requests so they don’t reach a user’s PC protecting it from attackers and viruses. Having 60-75% of your network behind firewalls is not the optimal situation for a p2p network because this doesn’t allow users who are behind a firewall to share with other users who are behind a firewall which means they can only share with users not behind a firewall.(This does not mean that users behind cannot share, it just means that users who are behind a firewall cannot share with other users behind a firewall which extremely limits their ability to participate/share in the network and earn Peer Cash.) That was a mouth full :)

There are a couple solutions to enable a user’s PC to accept incoming connections so they can share with everyone while still keeping their PC protected from attackers or viruses, but the solution that works the best is called “Port Forwarding”. Every software or hardware firewall has the capability to “Port Forward” and once properly configured, incoming requests that are received by the firewall that match the target IP and port will be forwarded on to the appropriate PC. This technique will work and allows your Peer Impact application to accept incoming connection from other Peer Impact applications or peers, but it has a few downfalls.
- In order to configure your firewall to “Port Forward” it takes a good amount of technical skill to do it correctly. I don’t know how many people I have helped configure “Port Forwarding” on their firewall and it took us weeks to finally get it to work.
- Most of the people who are using a firewall are also using the device’s DHCP server to obtain an IP. Once you are assigned an IP there is no guarantee that the DHCP server will let you have that IP forever. There is a good chance it will change which means you will have to reconfigure your firewall to work with the new IP. Especially if you are running Peer Impact on a laptop that is moving from location to location.

Luckily, there is a better solution to this problem that uses the UPnP (Universal Plug and Play) protocol to talk to your firewall and ask it to do the port forwarding for you with no technical skills required. UPnP is a relatively new set of protocols that allow devices to interact with each other more easily. One protocol called the Internet Gateway Device (IGD) Standardized Device Control Protocol V 1.0 allows other devices to get information and configure Internet Gateway devices like a D-Link or Linksys router. Fortunately, a lot of the main Internet Gateway or home router manufactures are supporting this protocol which makes it practical for applications like Peer Impact to use the protocol for port forward. Using this protocol Peer Impact can configure any Internet Gateway device that supports UPnP to enable port forwarding without any interaction from the user.

Using the UPnP protocol would make everything a lot easier because people would not need to know the following.
- Their internal IP of their computer
- What port or ports to forward
- What Internet protocols to use when forwarding.(TCP or UDP or both)
- The IP address of their Internet Gateway so they can configure it manually
- The user name and password to login to their Internet Gateway.
- How to find and use the configuration screens on the device to port forward

Now using the UPnP protocol to port forward does comes with it’s downfalls.
- Not all Internet Gateway devices support UPnP
- Even the ones that have support for UPnP don’t work properly
- On some devices and platforms UPnP support isn’t turned on by default
- Microsoft’s support and SDK implementation of the Internet Gateway Device (IGD) Standardized Device Control Protocol V 1.0 is buggy and very unpredictable. Some days it works and some days it doesn’t.

In the end I think trying to use UPnP to “Port Forward” is worth the effort because if it doesn’t work people can still fallback to manually configuring their device to “Port Forward”. Plus, one would hope that support for UPnP on the Windows platform and Internet Gateway devices can only improve over time. So look for this feature in an upcoming release of Peer Impact.

NOTE: I have also looked at some open source code that should work when Peer Impact decides to support other platforms like Linux and Mac OSX. I haven’t done enough research to comment on how reliable these implementations are.

For more information on port forwarding visit PortForward.com