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Groups > comp.os.linux.networking > #1235

Re: Is this a bridging scenario?

From Pascal Hambourg <boite-a-spam@plouf.fr.eu.org>
Newsgroups comp.os.linux.networking
Subject Re: Is this a bridging scenario?
Date 2012-04-08 14:20 +0200
Organization Plouf !
Message-ID <jlrvq6$2muf$1@saria.nerim.net> (permalink)
References <b5b53ca6-9141-4105-b701-4b8935268f02@vy8g2000pbc.googlegroups.com> <jkmhbp$em6$1@dont-email.me> <2f8acba3-b55f-42c3-b7ff-c7de7bf22649@qg3g2000pbc.googlegroups.com>

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Al a écrit :
> 
> Sorry for the belated reply. Ok I understand that it is routing, and I
> will need to set a static IP on the interfaces.

As I wrote, it can be either routing or bridging. Let's go for routing.

> Lets say on the PC we have
> 
> wlan0 192.168.1.120
> eth0 192.168.2.121 (I think eth0 needs to be a diff subnet right?)

Correct.

> and on the camera which connects to eth0:
> 
> cam1 192.168.2.122

Fine.

> I then need a routing "rule" ?

No. But in order for the camera to be able to connect to the internet,
you need to set the Linux box (192.168.2.121) as the default gateway on
the camera and set up the Linux box as an IP router (sysctl
net.ipv4.ip_forward=1).
Also you will need to either :
- create a static route on the router to the camera subnet
(192.168.2.0/24) with the Linux box (192.168.1.120) as the gateway.
- or set up masquerading on the Linux box (iptables -t nat -A
POSTROUTING -o wlan0 -j MASQUERADE).

> and how would I port forward so I can access the camera directly from
> the inet?

If the router has a static route to the camera subnet, then it should be
possible to create a port forwarding rule directly to the camera
(192.168.2.122) on it.
Otherwise you need to create a port forwarding rule to the Linux box
(192.168.1.120) on the router and create a similar port forwarding rule
to the camera on the Linux box :
iptables -t nat -A PREROUTING -i wlan0 -d 192.168.1.120 -p tcp --dport
80 -j DNAT --to 192.168.2.122
(change with whatever port the camera is using)

> how would I port forward so I can access the linux box from the net?

See above. This is router-dependent.

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Thread

Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-03-24 15:55 -0700
  Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-03-24 15:57 -0700
  Re: Is this a bridging scenario? Aragorn <stryder@telenet.be.invalid> - 2012-03-25 09:26 +0200
    Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-03-25 10:56 +0200
      Re: Is this a bridging scenario? Aragorn <stryder@telenet.be.invalid> - 2012-03-25 12:19 +0200
    Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-08 05:00 -0700
      Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 14:20 +0200
        Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-08 06:10 -0700
          Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 16:28 +0200
            Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-08 12:39 -0700
              Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 22:32 +0200
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-09 08:28 -0700
                Re: Is this a bridging scenario? Scott Hemphill <hemphill@hemphills.net> - 2012-04-09 12:41 -0400
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-09 11:52 -0700
                Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-09 21:09 +0200
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-10 01:56 -0700
                Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-10 20:30 +0200
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-10 16:30 -0700
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-10 19:23 -0700
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-10 22:54 -0700
                Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-11 09:33 +0200
                Re: Is this a bridging scenario? Scott Hemphill <hemphill@hemphills.net> - 2012-04-09 18:19 -0400

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