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From: "Martin A. Brown" <mabrown-lartc@securepipe.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] About HTB , bandwidth limiting for ftp port...
Date: Fri, 14 Mar 2003 02:37:33 +0000	[thread overview]
Message-ID: <marc-lartc-104760952809225@msgid-missing> (raw)
In-Reply-To: <marc-lartc-104759525429091@msgid-missing>

Hi there Dhirendra,

 : Okay now I put on a rule for FTP port 21 for 100Kbps. Now when I am
 : retriving data from ftp server I think the port is different when doing
 : passive ftp transfer. If I am not wrong then a new dynamic port is sent
 : by the ftp server to the client.. and then client initiates a new
 : connection on that port and then the real ftp data transfer happens.

Yes.  I think FTP should be summarily executed.  It has been plaguing us
since the beginnings of firewalls and NAT.  Sadly, another spiritually
impoverished but well-known operating system has two basic options for
file transfer:  HTTP ("the Internet", of course!), and FTP (for experts!).
Of course, on the other side of the divide, people (ab)use ssh for all
sorts of nefarious purposes.......  (anybody remember a recent article in
some print periodical detailing NFS over ssh?)

There has been discussion on the question of FTP (port/passive) and
shaping on this list in the past.  Here are some links.

See the following threads:

  http://mailman.ds9a.nl/pipermail/lartc/2001q3/001473.html
  http://mailman.ds9a.nl/pipermail/lartc/2002q1/002388.html
  http://mailman.ds9a.nl/pipermail/lartc/2003q1/007498.html

See also Eric Leblond's description of usage:

  http://home.regit.org/connmark.html

 : My Question is : Now when limiting the bandwidht will htb limit that
 : data transfer(i.e. the real file transfer) also under 100Kbps or will
 : that data transfer be not at all affected by the rule..?

That depends entirely on how you use the tools above.  Take a look at Eric
Lelond's description, and let us know if you are successful.

 : Just a novice question.. but please guide me...

This question is in exactly the right forum, and I'm quite sure I wouldn't
call it a novice question....though it might well belong in that rumoured
FAQ.

Good luck,

-Martin

-- 
Martin A. Brown --- SecurePipe, Inc. --- mabrown@securepipe.com

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  reply	other threads:[~2003-03-14  2:37 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-03-13 22:55 [LARTC] About HTB , bandwidth limiting for ftp port Dhirendra Pal Singh
2003-03-14  2:37 ` Martin A. Brown [this message]
2003-03-14  3:00 ` Jack Bowling
2003-03-14  4:19 ` Dhirendra Pal Singh
2003-03-14 21:52 ` Stef Coene
2003-03-15  0:16 ` Dhirendra Pal Singh
2003-03-15 10:41 ` Stef Coene

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