[K12OSN] iptables gurus

Jim Kinney jim.kinney at gmail.com
Tue Dec 20 22:54:21 UTC 2011


with upload bandwidth that low, you are at the bottom end of viop/sip
telephony capability. Other than having a setting that detects a phone call
and blocks ftp, I don't see a way to do this with iptables.

Check out the advanced router how-to http://lartc.org/lartc.html and check
on the ftp server and see if there is bandwidth limits you can set there.

On Tue, Dec 20, 2011 at 5:06 PM, Barry R Cisna <brcisna at eazylivin.net>wrote:

> Hello ALL,
> Curious if anyone on the list here would have any ideas on this . This
> is not really K12LTSP specific, but I thought possibly there may be
> someone here that lives and breathes iptables.
> On my K12LTSP server (at home) I also run asterisk on the same server.
> I also have a Vonage phone as well "behind" the Centos 5 server as
> well.
> Anyways voice quality is fine on both my asterisk phones as well as my
> Vonage phone, unless someone is downloading off of the ftp server I have
> running on this server. Once the downloading occurs I can hear the
> caller fine but they can no longer hear me at all.
> I am not sure after reading many many posts from various sip/voip sites
> that the native iptables is capable of doing QoS? I tried the following
> config from a voip site but it didn't make any changes to voice going
> out at download time. I only get about 245kb upload and 3 MB down BTW. I
> am in the sticks.
> /sbin/iptables -A OUTPUT -t mangle -p udp -m udp --sport 4569 -j DSCP
> --set-dscp-class ef
> /sbin/iptables -A OUTPUT -t mangle -p udp -m udp --sport 10000:20000 -j
> DSCP --set-dscp-class ef
> /sbin/iptables -A OUTPUT -t mangle -p udp -m udp --sport 5060 -j DSCP
> --set-dscp-class ef
> Thanks,
> Barry
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James P. Kinney III

As long as the general population is passive, apathetic, diverted to
consumerism or hatred of the vulnerable, then the powerful can do as they
please, and those who survive will be left to contemplate the outcome.
- *2011 Noam Chomsky

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