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    SubjectRe: tcp/ip connect on demand
    Jan Engelhardt wrote:
    > On Thursday 2008-07-03 20:28, H. Peter Anvin wrote:
    >> Jens-Michael Hoffmann wrote:
    >>> hi,
    >>>
    >>> what is the right way to implement a "connect on demand" feature?
    >>> Example: user types url in firefox and presses return. Then
    >>> the system should set up network devices and proceed as usual.
    >>>
    >>> Is there a hook in the kernel we can use?
    >> In the kernel, no. Nor do you need one; the best place to hook into this is
    >> probably the name service system (so you catch it on trying to look up
    >> hostnames.)
    >>
    >> Alternatively, you can set up a bridge device which you can listen to via a tap
    >> device; when you see traffic, you bring up the real network and attach it to
    >> the bridge.
    >
    > There is on-demand for PPP devices; though that is probably specific
    > to PPP.

    Yes, those monitor traffic at the PPP device port, I believe.

    -hpa


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