From: Ramin Alidousti <ramin@cannon.eng.us.uu.net>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] ssh versus scp
Date: Mon, 25 Nov 2002 21:27:25 +0000 [thread overview]
Message-ID: <marc-lartc-103825987205148@msgid-missing> (raw)
In-Reply-To: <marc-lartc-103825161927999@msgid-missing>
Hi,
You are out of luck here. There is no distinction between ssh and scp
at IP, TCP or the application layer for that matter. Basically scp is
a wrapper which uses ssh as the transfer method...
Ramin
On Mon, Nov 25, 2002 at 08:12:07PM +0100, Sebastian 'spax' Pape wrote:
> hi!
>
> I'd like to priorize ssh traffic, but of course I don't like scp to
> get priorized, too. In the "actual script" of the howto priorization
> is done with this:
>
> | # TOS Minimum Delay (ssh, NOT scp) in 1:10:
> | tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
> | match ip tos 0x10 0xff flowid 1:10
>
> I'm not sure if I got all of it, but it seems to me, that there is no
> port match - it seems to me that this rule matches all packets with a
> Minimize-Delay 16 (0x10) TOS value.
>
> I watched some packets with tcpdump and it also seems that scp packets
> all have the Maximize-Throughput 8 (0x08) TOS value, but all "pure
> ssh" packets have Normal-Service 0 (0x00). It's no problem to match
> these packets with iptables (just drop me a note if you want to have
> the iptables syntax). But the question I have is:
>
> Are these TOS-values standard for ssh and scp or do all
> ssh/scp-clients use the values they like? I searched the net, but
> haven't found anything usefull, yet.
>
> best regards
>
> Sebastian
>
> --
> Sebastian 'spax' Pape | A diplomat is someone who can tell you to go
> mailto: sebastian@p-a-p-e.de | to hell in such a way that you will look
> gpg: http://p-a-p-e.de/gpg.asc | forward to the trip.
> --- Do you want to know more? http://www.p-a-p-e.de/ ---
>
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next prev parent reply other threads:[~2002-11-25 21:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-25 19:12 [LARTC] ssh versus scp Sebastian 'spax' Pape
2002-11-25 21:27 ` Ramin Alidousti [this message]
2002-11-25 21:44 ` Robert Penz
2002-11-25 22:11 ` Martin A. Brown
2002-11-25 22:28 ` M.F. PSIkappa
2002-11-25 22:34 ` Sebastian 'spax' Pape
2002-11-25 22:42 ` Sebastian 'spax' Pape
2002-11-26 4:15 ` Kenneth Porter
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