Re: ssh type of service (tos)

From: Richard E. Silverman (res_at_qoxp.net)
Date: 09/23/05

  • Next message: Keld Jørn Simonsen: "Re: ssh type of service (tos)" 
    Date: 23 Sep 2005 09:35:37 -0400

    >>>>> "KJS" == Keld Jørn Simonsen <keld@dkuug.dk> writes:

        KJS> Den Thu, 22 Sep 2005 20:46:57 -0400. skrev Richard E. Silverman:
    >>>>>>> "KS" == Keld Jørn Simonsen <keld@dkuug.dk> writes:
    >>
        KS> Hi I am using openssh for a number of things, including file
        KS> transfer and mirroring, and I would like to be able to do traffic
        KS> policing, such as downgrading the priority of packet of a scp
        KS> transfer. How can I do that? I looked in the man pages and
        KS> googled 'openssh typeofservice' but I did not seem to get anything
        KS> I could use.
    >>
        KS> I thought maybe adding a keyword 'TypeOfService' for .ssh/config,
        KS> that also could be used by the ssh and scp -o flag could do what I
        KS> wanted.
    >> There's nothing in OpenSSH that can do this -- nor can you do it
    >> in the network, because the difference between an SSH connection
    >> carrying terminal traffic and one doing scp is invisible to the
    >> outside world (at least explicitly), the protocol being encrypted.

        KJS> Packets are packets an tos are a fundamental part of the packet
        KJS> structure. So could the tos be set *after* doing the encryption?

    Of course, if OpenSSH were doing it. I wrote that you can't do it "in the
    network" -- that is, apply TOS to the IP packets which make up an SSH
    connection externally depending on whether it's doing scp, because you
    can't tell from the outside.

    Darren mentioned that OpenSSH already sets TOS appropriately, which I
    should have said; my point was that it doesn't allow you to set it
    yourself, which is what I thought you were asking. 

    -- 
  Richard Silverman
  res@qoxp.net
  • Next message: Keld Jørn Simonsen: "Re: ssh type of service (tos)"

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