[CentOS] Bandwidth optimization
James A. Peltier
jpeltier at cs.sfu.ca
Mon Nov 5 15:45:07 UTC 2007
Bazy wrote:
>
> Yes you are right, we should prioritize ack's and dns requests (port 53)
> at first. But this is CentOS not BSD, so we should use tc (show /
> manipulate traffic control settings).
Sorry, as I've said before I'm not familiar with the GNU/Linux
equivalent firewall things. Thanks for pointing out TC.
> Ioannis Vranos: You should connect from a windows machine and check if
> the ping reply and the download speeds are the same as on the linux
> machine. If the windows machine proves to be faster, start debugging the
> linux machine. 160-170 ms to your ISP's gateway seems a lot of latency
> to me. I have a cable modem and an 6 ms latency to my ISP.
You may also want to run a netstat -ia on both machines and verify that
there are not a bazillion connections, which might give an indication of
a system compromise such as rootkit or botkit. 160-170ms seems awful
high to me for such a high speed connection.
--
James A. Peltier
Technical Director, RHCE
SCIRF | GrUVi @ Simon Fraser University - Burnaby Campus
Phone : 778-782-3610
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E-Mail : jpeltier at cs.sfu.ca
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