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Groups > comp.os.linux.networking > #2219

Re: question about forwarding and sysfs entries

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Richard Kettlewell a écrit :
>
> I looked into the meaning of 'all' in another place back in March.  It
> turns out to be a bit weird.  Here's what I wrote at the time:
> 
>   I don't think it has a single coherent meaning.  For instance:
> 
>    - Setting net.ipv4.conf.all.forwarding=1 sets
>      net.ipv4.conf.<device>.forwarding for every device.
> 
>    - Setting net.ipv4.conf.all.accept_redirects=0 doesn't disable it for
>      any of the individual devices.
> 
>   This is done on a case-by-case basis for each sysctl (although most are
>   like accept_redirects rather than forwarding).

Indeed 'forwarding' is the special case. For most other parameters under
net.ipv4.conf, the operationnal value for each interface is a
combination of net.ipv4.conf.<interface>.<parameter> and
net.ipv4.conf.all.<parameter>. The operator may be AND, OR, MAX...
depending on each parameter. See the descriptions in ip-sysctl.txt.
AFAICS, it seems that most parameters under net.ipv6.conf.all other that
forwarding are just ignored.

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question about forwarding and sysfs entries wkevin <wkevils@gmail.com> - 2013-06-15 04:26 -0700
  Re: question about forwarding and sysfs entries Xavier Roche <xroche@free.fr.NOSPAM.invalid> - 2013-06-15 14:05 +0200
    Re: question about forwarding and sysfs entries Richard Kettlewell <rjk@greenend.org.uk> - 2013-06-15 16:14 +0100
      Re: question about forwarding and sysfs entries Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2013-06-22 14:40 +0200
  Re: question about forwarding and sysfs entries Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2013-06-22 14:42 +0200

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