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Re: [K12OSN] iptables gurus


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 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

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


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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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