slow torrent : torrent, slow

May 17, 2008 07:22am pdt

1. Nopius 100,209
2. shakoush... 55,437
3. ravenpl 42,851
4. noci 37,415
5. omarfarid 29,333
6. Redimido 22,095
7. uetian1707 18,000
8. arnold 13,852
9. arrkerr1024 12,520
10. Tintin 11,750
11. WizRd-Linux 10,375
12. PeturIng... 10,292
13. KeremE 10,180
14. rindi 10,022
15. grblades 8,750

1. jlevie 726,902
2. Redimido 400,105
3. pablouru... 397,760
4. ravenpl 322,340
5. Nopius 285,271
6. wesly_chen 255,118
7. noci 180,410
8. rindi 143,219
9. ahoffmann 123,555
10. alextoft 110,594
11. KeremE 91,137
12. grblades 87,108
13. jar3817 77,310
14. pjedmond 76,703
15. e-tsik 73,472

01.08.2006 at 09:01AM PST, ID: 21688457

	[x] Attachment Details

[x]

The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

The Grade of the Solution
The Zone Rank of the Expert Providing the Solution
The Number of Author and Expert Comments
The Number of Experts Contributing
The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

8.4

slow torrent

Zone: Linux Networking

Tags: torrent, slow

I need help to speed up torrent downloads.
The fastest i ever get is about 35Kbps.
I have an internal network behind a NAT firewall (with DSL modem)
I have a static ip.
I have forwarded ports 6881-6889 tcp/udp.

What next?

Start your free trial to view this solution

Question Stats

Zone: Networking

Question Asked By: omom

Solution Provided By: jlevie

Participating Experts: 1

Solution Grade: A

Translate:

Loading Advertisement...

Microsoft

Internet Protocols
Applications

Development
OS

Hardware
Windows Security

Apple

Operating Systems
Hardware

Programming
Networking

Software

Internet

Search Engines
File Sharing
WebTrends / Stats
Spy / Ad Blockers

Web Browsers
New Net Users
Web Development
Chat / IM

Anti Spam
Web Servers
Anti-Virus
Email Clients

Gamers

Tips
Online / MMORPG
Puzzle
Emulators

Action / Adventure
Role Playing
Consoles
Game Programming

Strategy
Sports
Misc
Computer Games

Digital Living

Hardware
New Net Users
New Users

Software
Digital Music
Gaming World

Home Security
Apple
Networking Hardware

Virus & Spyware

Vulnerabilities
IDS
Encryption
Anti-Virus

Operating Systems Security
Software Firewalls
WebApplications
Cell Phones

Operating Systems
Internet
Hardware Firewalls

Hardware

Handhelds / PDAs
Displays / Monitors
Components
Networking Hardware

Peripherals
Laptops/Notebooks
Storage
Servers

Desktops
New Users
Misc
Apple

Software

System Utilities
Industry Specific
Network Management
Photos / Graphics
Page Layout
VMWare
Misc
Web Development

OS
CYGWIN
Voice Recognition
Message Queue
Quality Assurance
Security
Firewalls
MultiMedia Applications

Development
Database
Office / Productivity
Business Management
OS/2 Apps
Server Software
Internet / Email

ITPro

OS
Storage
Encryption
Operating Systems Security
Apple Hardware
Laptops & Notebooks
Servers
Networking Hardware
Peripherals

Devices
Displays / Monitors
WebTrends / Stats
Search Engines
Firewalls
WebApplications
IDS
Vulnerabilities
Email Clients

File Sharing
Spy / Ad Blockers
Web Browsers
Web Servers
Networking
Anti-Virus
Chat / IM
Anti Spam

Developer

Web Servers
Web Browsers
Game Programming
Dev Tools
Industry Specific
Office / Productivity

Database
CYGWIN
Web Development
Search Engines
File Sharing
WebTrends / Stats

Programming
Content Management
Application Servers
Protocols

Storage

Removable Backup Media
Storage Technology
Servers

Grid
Remote Access
Backup / Restore

Misc
Hard Drives

Miscellaneous
Security
Development
Linux
VMWare

MainFrame OS
Unix
Apple
OS / 2
AS / 400

BeOS
Microsoft
VMS / OpenVMS

Database

Oracle
Miscellaneous
MySQL
Software
Sybase
Contact Management
PostgreSQL
Data Manipulation
Clarion
InterSystems Cache

Siebel
MUMPS
OLAP
SQLBase
SAS
GIS & GPS
4GL
Berkeley DB
DB2
Informix

Interbase / Firebird
FoxPro
Reporting
LDAP
Filemaker Pro
MS SQL Server
dBase
MS Access

Security

Misc
Web Browsers
Software Firewalls
Operating Systems Security
File Sharing

Spy / Ad Blockers
Vulnerabilities
WebApplications
IDS
Anti-Virus

Encryption
Anti Spam
Email Clients
VPN
Chat / IM

Programming

Editors IDEs
Installation
Handhelds / PDAs
Multimedia Programming
System / Kernel

Algorithms
Game
Signal Processing
Project Management
Open Source

Database
Misc
Languages
Processor Platforms
Theory

Web Development

Scripting
Blogs
Web Servers
Software
Search Engines
Web Graphics
Images

Internet Marketing
Images and Photos
Components
Document Imaging
Web Languages/Standards
Illustration
WebApplications

Fonts
WebTrends / Stats
Authoring
Digital Camera Software
Miscellaneous

Networking

Protocols
Apple Networking
Network Management
Message Queue
Application Servers
Content Management
File Servers
Email Servers
Misc
Java Editors & IDEs

Wireless
Networking Hardware
Backup / Restore
System Utilities
ISPs & Hosting
Web Servers
Storage Technology
Removable Backup Media
Servers
Broadband

Grid
OS / 2
Novell Netware
Unix Networking
Windows Networking
Security
Telecommunications
Operating Systems
Linux Networking

Other

Community Advisor
Lounge
Community Support
New Net Users

Philosophy / Religion
Math / Science
Miscellaneous
URLs

Expert Lounge
Politics
Puzzles / Riddles

Community Support

Suggestions
New to EE
New Topics
Community Advisor

CleanUp
Announcements
General

Feedback
Input
EE Bugs

01.08.2006 at 09:18AM PST, ID: 15642219

Rank: Sage

jlevie:

Assuming that there's not a lot of other local traffic on your Internet connection that's causing Torrent to have to compete for bandwidth, the only other common local problem would be a mis-negotiated ethernet link. That happens when the link mode is different at each end (i.e., one end using half duplex and the othe using full duplex). A link in that mode will still work, but transfers will be in the tens of Kb/sec.

If your DSL modem is using PPPoE it may be necessary to set the MTU down to 1400.

Other possible local causes might include a flaky NIC at either end of the link or an interrupt problem on the local machine. But those are relatively rare cases and all nework activity will be slow (local or Internet).

If there are no obvious local problems, the slow speed could be just congestion upstream of your DSL modem.

01.08.2006 at 10:04AM PST, ID: 15642543

omom:

As a test I just downloaded openoffice.
104.2 mb in 11minutes 25 seconds
It starts out downloading at 1500 Kbps and decreases steadily down to 100 Kbps by the end.
Why does it do this?

Still, if i could torrent at 100Kbps, that would be a great improvment.

>>the link mode is different at each end (i.e., one end using half duplex and the othe using full duplex
where are these ends?
both in my realm, or is one part of the phone company's?

How do I determine of my mode is using PPPoE?
I have a ActionTec modem.
There is a web page I can go to for it.

How do I determine the MTU of my PPP/PPPoE?

01.08.2006 at 10:41AM PST, ID: 15642837

Rank: Sage

jlevie:

> It starts out downloading at 1500 Kbps and decreases steadily down to 100 Kbps by the end.
> Why does it do this?

How fast does the speed decrease? How were you doing the download (HTTP, FTP, or what)?

> where are these ends?
> both in my realm, or is one part of the phone company's?

I'm talking about the local ethernet connections. You can use 'ethtool eth0' or 'mii-tool eth0' to find out what the local link mode is. The documentation for your modem may state what it is supposed to be using.

If your modem config requires a usename and password to connect to the Internet it is almost certainly using PPPoE. Because of the encapsulation PPPoE requires it may be necessary to set the MTU for the local ethernet interface to 1400. That can be done dynamically with 'ifconfig eth0 mtu 1400'.

01.08.2006 at 11:00AM PST, ID: 15642940

omom:

The OO download was via http.
The speed decreases steadily, though the rate at which it decreases is itself decreasing.
(hope that's clear)

i guess i don't have eth0 (only eth1 and lo show up in ifconfig)

# /usr/sbin/ethtool eth1
Settings for eth1:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: yes

So there's mention of link modes in there.
what does this mean?

01.08.2006 at 11:28AM PST, ID: 15643076

Rank: Sage

jlevie:

Which ActionTec model do you have?

01.08.2006 at 12:34PM PST, ID: 15643383

omom:

GT701-WG

01.08.2006 at 01:28PM PST, ID: 15643639

Rank: Sage

jlevie:

Are you connecting to the modem via USB, wireless, or Ethernet?

01.08.2006 at 01:40PM PST, ID: 15643690

omom:

ethernet

01.08.2006 at 02:17PM PST, ID: 15643874

Rank: Sage

jlevie:

In that case my guess is that the slow speed is as a result of network congestion upstream of your modem. That could probably be proved by looking at the directions and time stamps of the torrent packet traffic with a sniffer (like tcpdump or ethereal). If your system looks like it is waiting on data packets the problem is most likely upstream.

Accepted Solution

01.13.2006 at 10:07AM PST, ID: 15693794

omom:

so, this is interesting

I did a tcpdump when I am doing *nothing* internet-wise and i see things like this:

11:00:50.093221 IP 219.254.35.196.53128 > myComputerName.myDomainName.com.ssh: . ack 1 win 5840 <nop,nop,timestamp 3477035636 11112236>
11:00:50.143770 IP myComputerName.myDomainName.com.ssh > 219.254.35.196.53128: P 1:24(23) ack 1 win 1448 <nop,nop,timestamp 11112563 3477035636>

Browsing on 219.254.35.196 shows that it is http://www.musicedu.net, a site which i have nothing to do with.
Is this a security breach?

01.15.2006 at 08:40PM PST, ID: 15708174

Rank: Sage

jlevie:

That trace is part of an ssh session. It may be just an ssh probe looking trying to guess a valid login name & password, or it may be an active ssh session. The former happens all the time and isn't that much of a problem assuming you have good passwords on all accounts. The later would mean that the system has been compromised. Try a 'last' command and see what login sessions there've been.

01.22.2006 at 06:43AM PST, ID: 15760316

omom:

No unusual logins, so i guess all is well.

I've since tried using a couple other torrent sites.
One gives the download speeds i usually get ( 1Kbps < speed < 40), but the other is usually in between 50 and 120.
So i guess it is dependent on the other end.

20080236-EE-VQP-29