Re: difference between SSL, SSH and VPN

From: Joss (joss_at_pleasereplytogroup.com)
Date: 05/16/03

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    Date: Fri, 16 May 2003 08:51:40 +0000 (UTC)

    thanks for the concise answer, it is a lot of help. I suspected that SSH and
    VPN were really quite similar, but cost aside ('poor man's VPN') are there
    any performance differences (i.e.speed of data transfer)?

    thanks,
    Jo

    "Eric Hanchrow" <offby1@blarg.net> wrote in message
    news:87he7xjq0m.fsf@blarg.net...
    > >>>>> "Joss" == Joss <joss@pleasereplytogroup.com> writes:
    >
    > Joss> What are the differences between SSL, SSH and VPN?
    >
    > Different goals.
    >
    > * SSL is a library that provides encryption, authentication, and other
    > stuff to applications.
    >
    > * SSH is an application (that happens to use SSL) that lets you
    > securly log in to remote systems, copy files, and forward ports.
    >
    > OK, strictly speaking, there are a number of implementations of
    > SSH. But they all offer more or less the same features.
    >
    > * VPN is a class of applications that lets you securely connect to a
    > remote network as if it were a local network. Thus there is
    > certainly some overlap with SSH, but VPN is more general -- any
    > program that communicates over the network will, once you set up a
    > VPN, be able to securely communicate with the remote system. SSH's
    > port-tunneling feature is sort of a poor man's version of VPN -- it
    > only works for TCP connections, for example, whereas I think VPN can
    > secure UDP as well.
    >
    > Joss> As far as I can see, VPN and SSH do exactly the same thing,
    >
    > No, but they overlap somewhat as I said above.
    >
    > A good resource for SSH is http://www.snailbook.com; its FAQ section
    > might address some of these questions.
    >
    > --
    >
    > /|_
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    > -- Thomas F. Bur***

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