Increase download speed of torrents

October 2016

Torrents is used to download huge chunks of data from the internet. These days, torrents like Vuze or uTorrent are increasingly used to download audios, videos, games etc. in a much more efficient way. Torrents reduce the load from a single download source. It redistributes the load to multiple users who can act as hosts. In this system, all of the users can move around the data files both ways at the same time as each other. If the users still find that the speed is not enough, they can optimize the Torrents to their maximum potential by tweaking the necessary settings.


I'm using BSNL Ev-Do wireless internet modem. I have already installed DAP-9 i to achieve a good speed for downloading MP3 and wallpapers, but it could not enhance the download speed of the torrents. Right now I am using Vuze torrents - is there any way to enhance the speed I am getting, around about 1 kbps, which is insufficient to download large files?


uTorrent was very slow for me until recently when I applied a few tweaks. Here's what I did:
Note: Some of the settings mentioned below are optimized for 256k connection. If you want to calculate the optimal settings for your connection, check at the end of this tutorial. But I suggest you to read the entire tutorial for guidance on other settings.

First go to Options>Preferences>Network
1. Under 'Port used for incoming connections', enter any port number. It is best to use a port number above 10000. I use 45682.
2. Randomise port each time utorrent starts: UNCHECKED. I leave this unchecked because I have a router. If you do not have a router or a firewall, and want extra security,check this option.
3. Enable UPnP port mapping (Windows XP or later only): UNCHECKED. I leave this unchecked because I have experienced it slowing down speeds. It is not needed if you manually port forward.
4. Include utorrent in your Windows Firewall exceptions (Windows XP SP2 or later only): UNCHECKED (do this only if you have Windows firewall disabled)
5. Global Maximum upload rate (kb/s): [0: unlimited]: 22 (for 256k connection)
6. Protocol Encryption: ENABLED. I would recommend everyone to enable this. This can help increase speeds with many ISPs.
7. Allow incoming Legacy Connections: CHECKED

1. Global Maximum Number of Connections: 130 (for 256k connection). This number should not be set too low or the amount of connections made to your torrents will be limited. Setting it too high may cause too much bandwidth to be used and can cause slowdowns.
2. Maximum Number of connected peers per torrent: 70 (for 256k connection). If you see that the peers connected to a specific torrent are exactly this number, or very close, increase this number to improve speeds.
3. Number of upload slots per torrent: 3 (for 256k connection). This depends on how much you want to upload to other users. Do not set too low or it may affect download speeds.
4. Use additional upload slots if upload speed <90%: CHECKED
5. Maximum number of active torrents: 2 (for 256k connection)
6. Maximum number of active downloads: 1 (for 256k connection)
7. Enable DHT Network: CHECKED. This is recommended to be checked to improve speeds. More people will be available for sharing if this is checked.
8. Enable DHT for new torrents: CHECKED
9. Enable Peer Exchange: CHECKED
10. Enable scrapping: CHECKED
11. Pre-allocate all files: CHECKED
12. Append .!ut to incomplete files: UNCHECKED

net.max_halfopen: 50

If you use Windows XP SP2, patch tcpip.sys with LvlLord's Event ID 4226 Patcher to get better performance.

DO NOT CHANGE THIS OPTION unless you have Windows XP SP2 and have patched tcpip.sys.
You can also patch tcpip.sys with xp-Antispy
If you have a firewall:
  • Open up the options/preferences/settings for the firewall - usually your firewall will have an icon to click on in the taskbar
  • Look for the keywords "allow list" or "programs"
  • Add the application you want to give access to the internet
  • Make sure to save your settings when you are done

If you have a router

1. Go to start>run>type CMD, press enter>type ipconfig, press enter
2. Remember both your ip address and your default gateway
3. Type in your default gateway into your default browser; a password prompt may come up. The default username and password are admin for my router
4. Under 'Applications' fill out one line for each p2p client you use
5. You need to use your ip address, the correct port range and set either tcp or udp
6. You can find and change the ports in the actual p2p client's settings, just make sure they are the same in the router
7. Most p2p apps need both tcp and udp checked, if you are not sure check your p2p client's FAQ
8. Save your settings
  • Check to forward ports for uTorrent.
  • Some of the settings I mentioned above are relative to my bandwidth.

How to calculate optimal settings for your connection:
  • In order to apply the following tips you need to know your maximum upload and download speeds. You can test your bandwidth over here.

Maximum upload speed:
  • If you use your Maximum upload speed, there won't be enough space left for the files you are downloading. So you have to cap your upload speed.
  • This is how I calculate my optimal upload speed...
  • upload speed * 80%
  • Maximum download speed
  • Setting your maximum download speed to unlimited will hurt your connection. So use this to calculate your optimal setting:

download speed * 90%
  • Maximum connected peers per torrent
  • upload speed * 1.3
  • Maximum upload slots
  • 1 + (upload speed / 6)
  • Disable Windows Firewall
  • Windows Firewall hates p2p so disable it and get yourself a decent firewall like Zone Alarm.
  • And lastly, optimize your Internet connection with TCP Optimizer.
  • Know any other tricks to increase uTorrent's download speed? Please share them here.

Thanks to Sam for this tip on the forum.

Related :

This document entitled « Increase download speed of torrents » from CCM ( is made available under the Creative Commons license. You can copy, modify copies of this page, under the conditions stipulated by the license, as this note appears clearly.