From: Justin Mason (jm at domain jmason.org)
Date: Tue 16 May 2000 - 15:16:20 IST
Sean McGrath said:
> Well I could use ftp but it would be better if I could use something
> which doesn't require logging in as the script will be running very
> frequently. tcpblast sends a specified number of 1024 byte blocks to the
> tcp or udp port 9 (--> /dev/null) and measures the bandwidth that way.
tcpblast was an old favourite of Alan Judge as I recall. I didn't think
it was still around though... one possible reason I can see, is that after
some DoS attacks a few years ago, people stopped running and started
filtering those low ports (echo, discard etc.). So using tcpblast on the
public internet may not be as useful as it used to be.
A paper came out just there (see http://www.arstechnica.com/ ) which
discussed a new, more reliable way of measuring throughput, as well as
other things. However it requires firewall filters (ie. ipchains)
installed to do the measurement.
--j.
--
Justin Mason Work: http://www.netnoteinc.com/ <jm at domain netnoteinc.com>
Personal: http://jmason.org/ <jm at domain jmason.org>
"It's true that some sharks get cancer. I said this in my book."
-- William Lane, author of _Sharks Don't Get Cancer_
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