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Re: something like Guide Post ?



Hi,

On Sun, 23 Aug 1998, Ben - Nes Michael wrote:

> Netguard (Which made the FireWall "Guardian" for NT) have a great
> product (For NT) that can lets you assign bandwidth priority, guarantee
> and limit bandwidth allocation.
> 
> The administrator can control which services will have priority on
> others - like if the web or the ftp is need more bandwidth the prog can
> decrease the bandwidth of the mail for example.
> 
> And to the big Question - Does linux have something similar ?

No, Linux doesn't have something similar. In fact, Linux cannot support
it, yet. I asked the kernel list about this and after a long discussion it
seemed that it is implementable only over IPv6 with minor adjustments to
the kernel, or a rather complete rewrite of the TCP/IP stack over IPv4, if
you would be using the Type Of Service field in the IP header, but not in
the near future.

Alan Cox said that:
-----
Date: Sat, 10 Jun 1998 19:01:39 +0000 (GMT)
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: shachar@vipe.technion.ac.il
Subject: Re: idea of kernel modification?

IPv4 has a type of service field (TOS) that Linux can honour. Make your
hosts use it right and queueing will favour the higher priorities. The
firewall code can theoretically rewrite the TOS fields of boxes that dont
set their TOS right or to your liking, but this requires some kernel
rewritings. I suspect it won't get into the kernel code before 2.2 is out.

Alan.
-----

Shachar Tal
-------------
Taub Computer Center, Technion, Israel Institute of Technology
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