QoS : very simple script needed

hi,

i try to read howto's and other papers about QoS with Linux... i must
say i understood a little how stuff works, but i cant figure out, how to
make a very simple script.

From what i read, i only need to change the TOS headers.

I have several applications :

1)
- Games
- Interactive stuff ( browsing )

2)
- Web server
- FTP server
- Game Server

3)
- mldonkey

I know the port use for each apps.

So i just want to tag ML donkey to use the slowest fifo(n° 2) in the
fifo_fast.

All my servers ( web,ftp,game) must use the fifo n° 1

And game packet must use the fifo n°0

How could i do this ????

I use iptables for forwarding and firewall rules.

Thanks for any help
Seb.

my linux : RedHat9, i.e. kernek 2.4.80.x

MagicFr wrote:
> hi,
>
> i try to read howto's and other papers about QoS with Linux... i must
> say i understood a little how stuff works, but i cant figure out, how to
> make a very simple script.
>
> From what i read, i only need to change the TOS headers.
>


port 27000:27030 is port used for Counter Strike
port 4662 is used by 'emule'

Seems that it's not working, when i play CS i have 10ms of ping.
If i launch emule , my ping drop beetween 50 to 120 ms.
If i understood correclty the TOS thing, i should not see any diffrence
because emule packet should always wait for other packet to have acces
to internet before them.

CS and emule are running from windows connected to linux gateway by
ethernet card, internet connection is by ethernet too.

ISP www.free.fr Freebox fastpath activated.

My mangle configuration.

*mangle
:PREROUTING ACCEPT [58750:53452959]
:INPUT ACCEPT [57439:53485156]
:FORWARD ACCEPT [4668:345779]
:OUTPUT ACCEPT [41183:5423214]
:POSTROUTING ACCEPT [48551:5947829]

-A PREROUTING -p tcp --sport 27000:27030 -j TOS --set-tos Minimize-Delay
-A PREROUTING -p tcp --dport 27000:27030 -j TOS --set-tos Minimize-Delay
-A PREROUTING -p tcp --dport 4662 -j TOS --set-tos Maximize-Throughput
-A PREROUTING -p udp --dport 4662 -j TOS --set-tos Maximize-Throughput
-A PREROUTING -p tcp --sport 4662 -j TOS --set-tos Maximize-Throughput
-A PREROUTING -p udp --sport 4662 -j TOS --set-tos Maximize-Throughput

-A OUTPUT -p tcp --sport 27000:27030 -j TOS --set-tos Minimize-Delay
-A OUTPUT -p tcp --dport 27000:27030 -j TOS --set-tos Minimize-Delay
-A OUTPUT -p tcp --dport 4662 -j TOS --set-tos Maximize-Throughput
-A OUTPUT -p udp --dport 4662 -j TOS --set-tos Maximize-Throughput
-A OUTPUT -p tcp --sport 4662 -j TOS --set-tos Maximize-Throughput
-A OUTPUT -p udp --sport 4662 -j TOS --set-tos Maximize-Throughput

regards,
Seb

On Sat, 04 Sep 2004 17:43:56 +0200, MagicFr wrote:

> i try to read howto's and other papers about QoS with Linux... i must
> say i understood a little how stuff works, but i cant figure out, how to
> make a very simple script.

Step 1 of trying to do anything on Linux, check see if someone else has
done it before you. ie, don't re-invent the wheel, or in this case
wondershaper.

http://lartc.org/wondershaper/

You should be able setup wondershaper to do what you want. Make sure you
read the README file thoroughly.

--
The only thing worse than X Windows: (X Windows) - X

Geoffrey King wrote:

>
> Step 1 of trying to do anything on Linux, check see if someone else has
> done it before you. ie, don't re-invent the wheel, or in this case
> wondershaper.
>
> http://lartc.org/wondershaper/
>
>
U are 100% right I didnt give details enough I already know about
wondershaper But this is NOT what i want. Wondershaper give priority
to upload and small packets against big packets. This wil not work for
what i want to do.

Despite that i tried this script and i do see a difference, amule was
faster against my games

anyway thanks for ur reply

Seb.

MagicFr <(E-Mail Removed)> wrote in message news:<4139f8df$0$26980$(E-Mail Removed)>...
> MagicFr wrote:
> > hi,
> >
> > i try to read howto's and other papers about QoS with Linux... i must
> > say i understood a little how stuff works, but i cant figure out, how to
> > make a very simple script.
> >
> > From what i read, i only need to change the TOS headers.
> >
>
>
> port 27000:27030 is port used for Counter Strike
> port 4662 is used by 'emule'
>
> Seems that it's not working, when i play CS i have 10ms of ping.
> If i launch emule , my ping drop beetween 50 to 120 ms.
> If i understood correclty the TOS thing, i should not see any diffrence
> because emule packet should always wait for other packet to have acces
> to internet before them.
>
> CS and emule are running from windows connected to linux gateway by
> ethernet card, internet connection is by ethernet too.
>
> ISP www.free.fr Freebox fastpath activated.
>
> My mangle configuration.
>
> *mangle
> :PREROUTING ACCEPT [58750:53452959]
> :INPUT ACCEPT [57439:53485156]
> :FORWARD ACCEPT [4668:345779]
> :OUTPUT ACCEPT [41183:5423214]
> :POSTROUTING ACCEPT [48551:5947829]
>
> -A PREROUTING -p tcp --sport 27000:27030 -j TOS --set-tos Minimize-Delay
> -A PREROUTING -p tcp --dport 27000:27030 -j TOS --set-tos Minimize-Delay
> -A PREROUTING -p tcp --dport 4662 -j TOS --set-tos Maximize-Throughput
> -A PREROUTING -p udp --dport 4662 -j TOS --set-tos Maximize-Throughput
> -A PREROUTING -p tcp --sport 4662 -j TOS --set-tos Maximize-Throughput
> -A PREROUTING -p udp --sport 4662 -j TOS --set-tos Maximize-Throughput
>
> -A OUTPUT -p tcp --sport 27000:27030 -j TOS --set-tos Minimize-Delay
> -A OUTPUT -p tcp --dport 27000:27030 -j TOS --set-tos Minimize-Delay
> -A OUTPUT -p tcp --dport 4662 -j TOS --set-tos Maximize-Throughput
> -A OUTPUT -p udp --dport 4662 -j TOS --set-tos Maximize-Throughput
> -A OUTPUT -p tcp --sport 4662 -j TOS --set-tos Maximize-Throughput
> -A OUTPUT -p udp --sport 4662 -j TOS --set-tos Maximize-Throughput
>
> regards,
> Seb

Note that all you're doing here is setting bits in the TOS field if
the headers. They've never been consistently honored (or honored at
all for the most part) outside a lan. Any benfit you will derive will
be at your end as the packets get queued and forwarded on your
machine. You're probably more interested in fwmark than TOS.

Can't remember offhand what doc explains the usefulness of the TOS
bits re: iproute2 -- probably in lartc.html somewhere. They are not
as useful by themselves as you might think.

Usually, this kind of thing is done when there are many (20+ ?) users
on a subnet sharing bandwidth, so I'm not sure how much benenfit
you'll see on a small lan with just 2 or 3 hosts.

You're headed in the right direction, but much more has to be done to
really get what you're looking for. Been several years since I've
played with this (gamers and p2p users), so I would direct you here
for an example:
http://lartc.org/howto/lartc.cookboo...nat.intro.html

Note that unless you use a qdisc _other_ than the default, you won't
see much difference -- the default is made to process packets quickly,
fifo.

Be prepared to spend some time with this to get it right, but the
example should get you started.

hth,
prg
email above disabled

hmm i think ur so right i used the tc -s qdisc that should tell me
where the things are bufferised ( if im correct ), and whith the TOS
changed , i see nothing with this command .. wich certainly means,
nothings is queued correctly

Thanks for the URL, seems to be a well explained ( 4 noobies like me ).
I'll start with that

Thanks.

Seb

> http://lartc.org/howto/lartc.cookboo...nat.intro.html
>
> Note that unless you use a qdisc _other_ than the default, you won't
> see much difference -- the default is made to process packets quickly,
> fifo.
>
> Be prepared to spend some time with this to get it right, but the
> example should get you started.
>
> hth,
> prg
> email above disabled