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Re: Mixing and Matching DHCP and static IPs

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On Tue, Dec 26, 2017 at 05:04:34PM +0100, Pascal Hambourg wrote:
> Le 26/12/2017 à 16:49, Michael Stone a écrit :
> > 
> > This is unnecessarily complicated, and will make your life harder than
> > it needs to be. The best thing would be to not use the airstation as a
> > router at all, just use it as a switch + wireless access point in a flat
> > configuration, with the router plugged into the switch. Ignore the "wan"
> > port on the airstation and turn off any dhcp or other services that it
> > is providing.
> 
> The most important part is "turn off any DHCP service it provides". Othewise
> it will get in the way of the other DHCP server.

I don't see any setting to turn that off in the AirStation web 
interface. I considered this approach in the very first place a year 
ago, and rejected it for that reason.

> 
> > This will not work the way you think it will. Devices on the airstation
> > will have packets go directly to 192.168.1.3 (because the airstation
> > knows how to get to anything on 192.168.1.0/24) (you never actually
> > specified the netmask for 192.168.1., hopefully that's correct). The
> > packets returning from 192.168.1.3 will go to 192.168.1.1 because
> > 192.168.1.3 does not know how to get to 192.168.11.0/24 and uses the
> > default route instead.
> 
> As any SOHO router, it is likely that the Airstation masquerades forwarded
> connections, so other nodes on its WAN side do no see the real 192.168.11.x
> addresses but only the WAN side address of the Airstation, 192.168.1.2.
> 
> I guess that even the firewall does not have a special route for
> 192.168.11.0/24, as it is not supposed to see that address range.
> 

You guess correctly Pascal, that's a known limitation of the approach 
that I consider irrelevant. There is no need to initiate connections 
into the "inner LAN" from the firewall, and connections can be initiated 
the other way with no problems.

Mark

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Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-25 16:30 +0100
  Re: Mixing and Matching DHCP and static IPs Henning Follmann <hfollmann@itcfollmann.com> - 2017-12-25 17:00 +0100
    Re: Mixing and Matching DHCP and static IPs deloptes <deloptes@gmail.com> - 2017-12-25 18:10 +0100
      Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-26 01:50 +0100
      Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-26 02:00 +0100
        Re: Mixing and Matching DHCP and static IPs Gene Heskett <gheskett@shentel.net> - 2017-12-26 02:50 +0100
        Re: Mixing and Matching DHCP and static IPs deloptes <deloptes@gmail.com> - 2017-12-26 12:20 +0100
          Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-26 12:50 +0100
            Re: Mixing and Matching DHCP and static IPs deloptes <deloptes@gmail.com> - 2017-12-26 15:30 +0100
  Re: Mixing and Matching DHCP and static IPs Nemeth Gyorgy <friczy@freemail.hu> - 2017-12-25 18:30 +0100
  Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-26 02:40 +0100
  Re: Mixing and Matching DHCP and static IPs Dan Purgert <dan@djph.net> - 2017-12-26 12:50 +0100
    Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-26 13:10 +0100
      Re: Mixing and Matching DHCP and static IPs Dan Purgert <dan@djph.net> - 2017-12-26 15:50 +0100
        Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-26 16:30 +0100
    Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-26 13:10 +0100
      Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-26 15:00 +0100
        Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-26 15:50 +0100
          Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-26 16:10 +0100
            Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-26 16:40 +0100
              Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-27 16:10 +0100
                Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-27 18:20 +0100
                Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-28 13:10 +0100
                Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-28 15:40 +0100
                Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-28 17:00 +0100
        Re: Mixing and Matching DHCP and static IPs Dan Purgert <dan@djph.net> - 2017-12-26 16:20 +0100
          Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-26 16:30 +0100
      Re: Mixing and Matching DHCP and static IPs Dan Purgert <dan@djph.net> - 2017-12-26 16:10 +0100
        Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-26 16:20 +0100
        Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-26 16:50 +0100
  Re: Mixing and Matching DHCP and static IPs Michael Stone <mstone@debian.org> - 2017-12-26 17:00 +0100
    Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-26 17:10 +0100
      Re: Mixing and Matching DHCP and static IPs Michael Stone <mstone@debian.org> - 2017-12-26 17:30 +0100
        Re: Mixing and Matching DHCP and static IPs Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-12-26 17:30 +0100
      Re: Mixing and Matching DHCP and static IPs Mark Fletcher <mark27q1@gmail.com> - 2017-12-27 13:00 +0100

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