This guide shows how to speed up downloads in the freeware bittorrent client, µTorrent. All bittorrent programs need to have their incoming and outgoing communications flow freely in order to achieve the highest download speeds and that is what this guide is about.

This guide was put together using information given by the developers of bittorrent programs at their forums, guides and FAQs. There are no secret tricks, just the real basics of proper set up of a bittorrent program. Following these simple steps should result in increased download speed.

These are the basic principles of optimizing a bittorrent client, like µTorrent, for speed:

• Choose a proper port to avoid ISP blocks and conflicts with other programs
• Forward that port through any software firewall and router to allow incoming connections
• Adjust internal settings based upon upload capacity of the internet connection to allow room for outgoing communications and to distribute upload efficiently.

There are some programs that claim to optimize speed in µTorrent.Such programs are a scam and generally contain adware or spyware. I have seen it said, by the developers of all bittorrent programs, that nothing will increase your download speed in a bittorrent client more than the basic steps set forth herein.

This guide will work for all versions of µTorrent and BitTorrent 6.1 (and later). Screen shots are from µTorrent 1.8.2 as the options menus had been changed starting with that version.

If you are not using µTorrent or BitTorrent, there are several other specific guides for other clients and a general guide here:
Optimizing Bittorrent Clients

Choosing A Proper Port

To avoid messing up a network connection that is already cleared, first check and see if your communications are blocked or are already clear. Have µTorrent running while you test the port.

Click to Test Your PortSuccess-just go to Adjusting Internal Settings.Error- follow all steps.

If you failed the port test above, then you should first set your port to a proper one.The most important choice here is to avoid using a port within the 6881-6999 range. This was the range originally used by bittorrent programs and is often blocked by Internet Service Providers (ISPs). (If your port was in this range, change and re-test). The safest choice is a port in the 49152-65534 range as this will avoid ISP blocks and possible conflicts with other applications.
Azureus-Wiki: Port is Blacklisted
Also, the Randomize port each start option should be disabled as this could affect router and firewall settings and rarely serves any useful purpose.

Forwarding The Port

Introduction
A router will block incoming communications unless an exception is made. All software firewalls will block incoming communications and most will also block outgoing communications, unless an exception is made. If you are "firewalled", then other people will not be able to initiate connections with you (see Why Is Being Firewalled Bad).
As there are many firewalls and routers, this guide can not give explanations as to each. However, there are guides available, on the internet for most firewalls and routers and this guide will link you to them.

Software Firewall - The permission should be set to allow TCP and UDP in both directions. Generally, you will have a choice to set permission for the µTorrent port or for the µTorrent program. Setting permission for the port is the safer choice. You can check these options for guides:

• The help file of your software firewall is the best place to look
•  The µTorrent forum has some guides posted
•  PortForward.com Firewall Guides(choose firewall and then µTorrent) also has some guides.

Router - There are two choices here. The easier way is to use UPnP. However, this has a possible security issue. Using UPnP allows any program to create a port mapping through the router without consent of the owner. The other choice is to manually forward the port through the router. This does not have that security issue, but involves going through several steps to accomplish. Using the guides linked herein, this should not be that difficult and is the preferred method.

UPnP (NAT-PMP in Apple) - The Easy Way -  Enable UPnP (NAT-PMP in Apple) in µTorrent and router.

Manual Forwarding-The Preferred Way

1. UPnP (NAT-PMP) Must be disabled in µTorrent (see image above)
2. Use the Static IP Guide 
3. Set permission for µTorrent port. This should be set to allow both TCP and UDP communications.
   You can check these options for guides:

• The help file of your router is the best place to look
• Portforward.com µTorrent Router Indexhas guides for most routers

Click Here to Re-Test Port  Success-Proceed to next step. Error- re-do steps or seek help in Forums. Have µTorrent running while re-testing the port.

Adjusting Internal Settings

Introduction
The most important setting here is to cap upload in µTorrent to 80% of your overall upload capacity. Setting upload in µTorrent is a fine line. The more upload you give, the more download you will get from other peers. However, if upload is set too high, or to unlimited, then download speeds will suffer as outgoing communications (acknowledgment signals, resend requests etc) will be interfered with. Other adjustments are made here to distribute your upload so that you receive back the most download from other peers.

Speed Test: Speedtest.net (Click for Test)
First the upload capacity of your internet connection must be determined by taking an online speed test. Speedtest.net has test locations worldwide and will highlight the one closest to you.
To take the test you must have Flash installed and javascript enabled.

Before taking the speed test, press Settings in the upper left of the speedtest.net page and make certain the Speed Measurement is set to kilobytes. This will help in inputting into the calculator below.

 

 

 

 

 

You should stop all internet activity, including torrents, before taking the test and the test should be taken a few times to obtain a reliable average. Results will now show in KiloBytes. It is the upload rate that is important here.

Another Way To Test Upload Speed
For most people these test results will be reliable (Comcast users see Note). However, you may wish to do a double check on real life upload speed. When you are active on a torrent with a good number of peers and you are using your upload cap, set upload to unlimited and watch for about 5-10 minutes and see where upload settles in at. Then input that number into the calculator in the kiloBytes section.

Note: Some ISPs will show inaccurate results on the speed test. If your ISP has anything like Comcast's PowerBoost, then your results will show higher than the actual speed of your connection. PowerBoost provides a burst of download and upload speeds above your provisioned download and upload speeds for the first 10MB and 5MB respectively. Since the speed test involves relatively small files, this will skew results upward. If you have PowerBoost, or something similar, you should initially use the speed test results and then use the test method in the paragraph above.

Calculator  :  Azureus Upload Settings Calculator
Once you have an average upload speed for your connection go to the online Azureus Upload Settings Calculator. Although designed for Azureus, this calculator will work for all bittorrent clients.
This calculator was created by the8472 a contributor to Vuze (fka Azureus) and part of the team that created Bittorrent Protocol Encryption.

Enter your average upload speed in the appropriate box

Input Results Into µTorrent - Screen shots of locations in µTorrent of settings to be adjusted

 

Peer Sources & Encryption

Having the proper peer sources enabled, such as Peer Exchange (PEX) and Distributed Hash Table (DHT), will help download speeds as they will help you find additional seeds and peers for a torrent.
Encryption was primarily designed to thwart Internet Service Providers interference with bittorrent. Having encryption enabled and allowing incoming legacy (non-encrypted) connections will provide you with the largest pool of seeds/peers to select from.

These settings are at Options>Preferences>BitTorrent and should be set as in this image:

Good Torrents

The general rule here is to choose torrents that have a high seed to peer ratio. Seeds have 100% of the content associated with the torrent and are only uploading to peers. Peers also upload to other peers, but are also looking for other peers to upload to themselves and their download capacity is almost always higher than their upload capacity.

This applies even though one swarm has significantly more active users than another. For example, a torrent with 30 seeders and 70 peers (30% seeders) will generally be faster than one with 500 seeders and 2500 peers (20% seeders) as the average upload capacity available to the peers will be higher. ( TorrentFreak).

For more information see Good Torrents

TechRiz.