Berkeley Uni - Netalyzer ICSI

[Fluff]

http://n9.netalyzr.icsi.berkeley.edu/analysis/

Tool to check your internet connection.

Article here... http://www.theregister.co.uk/2010/01...talyzr_debuts/

For me Virgin Media UK (cable modem)

Summary of Noteworthy Events –

Major Abnormalities Your DNS resolver returns results even when no such server exists

Minor Aberrations Certain TCP protocols are blocked in outbound traffic

Direct TCP access to remote RPC servers (port 135) is blocked.
Direct TCP access to remote NetBIOS servers (port 139) is blocked.
Direct TCP access to remote SMB servers (port 445) is blocked.

Network packet buffering may be excessive

Network buffer measurements (?): Uplink 1200 ms, Downlink 290 ms

[SitFlyer]

My noteworthy results:

Minor Aberrations

* Certain TCP protocols are blocked in outbound traffic
* Network packet buffering may be excessive
* Virus filtering appears to be present on your host or network

Direct TCP access to remote RPC servers (port 135) is blocked.
Direct TCP access to remote NetBIOS servers (port 139) is blocked.
Direct TCP access to remote SMB servers (port 445) is blocked.


Network buffer measurements (?): Uplink 570 ms, Downlink 98 ms

[Wulfman]

NOD32 quarantined the applet....

mfg
wulfman

[degrub]

yeah, kapersky did too because of the test file downloaded - it was a false positive according to virus.com and expected.

[VJ]

Nice test!
For some odd reason, my network did not allow some of the timing tests (but maybe because it is a 3G connection).

[Evildead666]

Summary of Noteworthy Events –

Minor Aberrations
Certain TCP protocols are blocked in outbound traffic
Network packet buffering may be excessive
Virus filtering appears to be present on your host or network

Network buffer measurements (?): Uplink 3500 ms, Downlink 370 ms

[Fluff]

Is anyone able to test on a business grade/ fiber internet connection to see if they also have a large uplink buffers?

@Sitflyer What sort of connection do you have? DSL / Cable etc.

[VJ]

I'm not sure what our connection is (university), but it is fast:

This is what the test gives:

Network Access Link Properties –
Network latency measurements (?): Latency: 110ms Loss: 0.0%
The round-trip time (RTT) between your computer and our server is 110 msec, which is good.
We recorded no packet loss between your system and our server.
TCP connection setup latency (?): 120ms
The time it takes your computer to set up a TCP connection with our server is 120 msec, which is good.
Network background health measurement (?): no transient outages
During most of Netalyzr's execution, the applet continuously measures the state of the network in the background, looking for short outages. During testing, the applet observed no such outages.
Network bandwidth measurements (?): Upload >20 Mbit/sec, Download >20 Mbit/sec
Your Uplink: We measured your uplink's sending bandwidth at >20 Mbit/sec. This level of bandwidth works well for many users.
During this test, the applet observed 9 reordered packets.
Your Downlink: We measured your downlink's receiving bandwidth at >20 Mbit/sec. This level of bandwidth works well for many users.
Network buffer measurements (?): Uplink is good, Downlink is good
We were not able to produce enough traffic to load the uplink buffer, or the uplink buffer is particularly small. You probably have excellent behavior when uploading files and attempting to do other tasks.
We were not able to produce enough traffic to load the downlink buffer, or the downlink buffer is particularly small. You probably have excellent behavior when downloading files and attempting to do other tasks.

So apperently, the uplink buffer is very small...

[Evildead666]

Work ADSL line, but its a bog standard connection, not a pro one or anything....


Network latency measurements (?): Latency: 140ms Loss: 0.0%
The round-trip time (RTT) between your computer and our server is 140 msec, which is good.
We recorded no packet loss between your system and our server.
TCP connection setup latency (?): 150ms
The time it takes your computer to set up a TCP connection with our server is 150 msec, which is good.
Network background health measurement (?): no transient outages
During most of Netalyzr's execution, the applet continuously measures the state of the network in the background, looking for short outages. During testing, the applet observed no such outages.
Network bandwidth measurements (?): Upload 680 Kbit/sec, Download 1010 Kbit/sec
Your Uplink: We measured your uplink's sending bandwidth at 680 Kbit/sec. This level of bandwidth works well for many users.
Your Downlink: We measured your downlink's receiving bandwidth at 1010 Kbit/sec. This level of bandwidth works well for many users.
Network buffer measurements (?): Uplink 770 ms, Downlink 660 ms
We estimate your uplink as having 770 msec of buffering. This level can in some situations prove somewhat high, and you may experience degraded performance when performing interactive tasks such as web-surfing while simultaneously conducting large uploads. Real-time applications, such as games or audio chat, may also work poorly when conducting large uploads at the same time.
We estimate your downlink as having 660 msec of buffering. This level can in some situations prove somewhat high, and you may experience degraded performance when performing interactive tasks such as web-surfing while simultaneously conducting large downloads. Real-time applications, such as games or audio chat, may also work poorly when conducting large downloads at the same time.

[Jammrock]

I'm not sure what our connection is (university), but it is fast...

OC-12

[VJ]

How can you tell it is OC-12? Is it just by the speed (there could be some traffic shaper...)?

[Taz]

Virgin UK 50mbps cable

Major Abnormalities

* Your DNS resolver returns results even when no such server exists

Minor Aberrations

* Certain TCP protocols are blocked in outbound traffic
* Network packet buffering may be excessive
* Your computer's clock is slightly fast