Author Topic: What maximum speed can I expect from using a VPN?  (Read 29050 times)

Offline Reuben

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What maximum speed can I expect from using a VPN?
« on: August 07, 2007, 12:36:11 AM »
Now you may be wondering, how come I don't get my maximum advertised speed even on the well seeded ubuntu torrent?

This faq assumes that you have

a) A perfect line or close to perfect one (good SNR and attenuation)
b) No routing issues with TM
c) No other background programs that use the internet running
d) No seeder/peer ratio issues
e) TCP optimization has been performed

Please check the speed troubleshooting guide if you wish to know how to tune your computer to close to achieving these conditions.

Most ISPs use the PPPoE protocol. This protocol has some overhead which results in around 10-15% loss in effective throughput. This PPPoE overhead is ALWAYS there regardless of VPN or not. Even your HTTP downloads are still subject to this.

Furthermore, the use of a proxy/VPN results in some overhead as well. We estimate this to be in the 10% region.

Now the figures given below are more or less theoretical and is still subject to loss on your ISP's line and I have not even factored in BT overhead or upload saturation.

1024 kbit Line (1 Mbit)

Quote
1024 kbit = 128 kB/sec

Take off PPPoE overhead (15%)

0.85 x 128 = 108.8 kB/sec

Now take off VPN/proxy overhead (around 10%)

0.9 x 108.8 = 97.9 kB/sec (Expected max speed roughly)

512 kbit Line

Quote
512 kbit = 64 kB/sec

Take off PPPoE overhead (15%)

0.85 x 64 = 54.4 kB/sec

Take off VPN/proxy overhead (10%)

0.9 x 54.4 = 49.0 kB/sec (Expected max speed roughly)

1536 kbit Line (1.5 Mbit)

Quote
1536 kbit = 192 kB/sec

Take off PPPoE overhead (15%)

0.85 x 192 kB/sec = 163.2 kB/sec

Now take off VPN/proxy overhead (around 10%)

0.9 x 163.2 = 146.9 kB/sec (Expected max speed roughly)

2048 kbit Line (2.0 Mbit)

Quote
2048 kbit = 256 kB/sec

Take off PPPoE overhead (15%)

0.85 x 256 kB/sec = 217.6 kB/sec

Now take off VPN/proxy overhead (around 10%)

0.9 x 163.2 = 195.8 kB/sec (Expected max speed roughly)

4096 kbit Line (4.0 Mbit)

Quote
4096 kbit = 512 kB/sec

Take off PPPoE overhead (15%)

0.85 x 512 kB/sec = 435.2 kB/sec

Now take off VPN/proxy overhead (around 10%)

0.9 x 435.2 = 391.7 kB/sec (Expected max speed roughly)
« Last Edit: June 08, 2010, 12:28:16 PM by Reuben »
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Re: What maximum speed can I expect from using a VPN?
« Reply #1 on: August 07, 2007, 10:17:22 AM »
I remember reading somewhere that DHT costs another 4kB/s or something like that. However, you get a lot more peers by enabling DHT unless you manage to get a good source tracker.

jackhorace

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Re: What maximum speed can I expect from using a VPN?
« Reply #2 on: August 12, 2007, 09:48:16 PM »
any one try soho package already? I am a Soho user .

Offline Reuben

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Re: What maximum speed can I expect from using a VPN?
« Reply #3 on: August 12, 2007, 09:58:07 PM »
There's little difference between normal streamyx and soho streamyx.

Perhaps better contention rate with soho but even that is debatable.

This means it should work with your SOHO streamyx with no problems as it is basically the same setup.
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DarthVaderAsip

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Re: What maximum speed can I expect from using a VPN?
« Reply #4 on: March 07, 2008, 10:44:08 PM »
it wont work if using SDSL rite?

Offline Reuben

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Re: What maximum speed can I expect from using a VPN?
« Reply #5 on: March 07, 2008, 10:48:48 PM »
It should work. But not sure if SDSL is throttled.
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DarthVaderAsip

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Re: What maximum speed can I expect from using a VPN?
« Reply #6 on: March 07, 2008, 10:51:47 PM »
it would be great if using the new streamyx 4mbps...
could get 0.5MBps...

longman

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Re: What maximum speed can I expect from using a VPN?
« Reply #7 on: March 08, 2008, 12:09:35 PM »
any one try soho package already? I am a Soho user .

i'm using soho 1mbps.... initially max 120KBPS (after 2-3days connection problem, newbie maaa)... now average 80KBPS... i'm considering it as ok...

PatrinaY

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Re: What maximum speed can I expect from using a VPN?
« Reply #8 on: December 27, 2008, 12:16:47 PM »
i'm a new user of bolehvpn. and i've tried downloading with utorrent, max speed i can get is around 40-50 kBps/sec. but mine is a 1 Mbit line. according to the info given above, i'm supposed to get around 90 kBps/sec. i have used the tcp optimiser n also the patcher and still getting the same speed. is it my internet connection? or is the speed considered ok?
when i download and surf(eg. facebook), the web takes longer to load, am i supposed to reconfigure the firefox settings? as i have read from the blog, i only need to change the config for privacy reasons etc.

any solutions? :)

Thanks!


freeman85

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Re: What maximum speed can I expect from using a VPN?
« Reply #9 on: December 27, 2008, 12:51:00 PM »
do the tmnet speedtest
check if tmnet miscapped your speed

PatrinaY

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Re: What maximum speed can I expect from using a VPN?
« Reply #10 on: December 27, 2008, 01:38:48 PM »
how to do the speedtest?

PatrinaY

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Re: What maximum speed can I expect from using a VPN?
« Reply #11 on: December 27, 2008, 02:21:31 PM »
i tried the speedtest, but it kept on saying network timeout...server is taking too long to reply

Offline Reuben

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PatrinaY

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Re: What maximum speed can I expect from using a VPN?
« Reply #13 on: December 27, 2008, 04:48:41 PM »
download speed 325 kb/sec. upload 106kb/sec. is that ok speed?

PatrinaY

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Re: What maximum speed can I expect from using a VPN?
« Reply #14 on: December 27, 2008, 05:13:12 PM »
i still get a speed of around 40-50 kbps/sec for downloading. i have done almost everything, ping average is 487. did tcp optimiser and patcher. my router has network cables that connects to 2 computers in my house. and my laptop uses wireless connection.
i'm at loss...

any advise?