Re: Setting up Masquerading on Debian machines.

1997-01-02 Thread Michael Meskes
Rob Browning writes:
 Is there any reason that msquerading wouldn't work right using the
 current (unstable) debian packages?

No! I've set up a firewall with it and it works fine.

 I set up the host (the one actually connected to the internet via ppp)
 with the following network related commands (in addition to a ppp
 defaultroute):
 ...
   ipfwadm -F -p deny
   ipfwadm -F -a accept -m -S 192.168.1.0/24 -D 0.0.0.0/0 -W eth0

I think you have to use the external device here. Please try with the check
option of ipfwadm.

   ifconfig eth0 192.168.1.2 netmask 255.255.255.0 broadcast 192.168.1.255
   route add -net 192.168.1.0 netmask 255.255.255.0
   route add default gw 192.168.1.1 metric 1
 
 This doesn't work.  I can ping the host from the client, and the
 host can reach the internet via it's pppd defaultroute, but the client
 cannot reach the internet, so the host is not forwarding the
 masqueraded packets.

You could add a command after the above ones on the host to make it log the
denied packages:
 
ipfwadm -F -a deny -S 0.0.0.0/0 -D 0.0.0.0/0 -o

Michael

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Re: Setting up Masquerading on Debian machines.

1996-12-30 Thread Remco van de Meent
At 12:16 PM 12/30/96 -0600, Rob Browning wrote:

[Previously (accidentally) posted to debian-devel]

Is there any reason that msquerading wouldn't work right using the
current (unstable) debian packages?

I tried to set up a simple net, following the instructions in the
IP-Masquerade mini-HOWTO, and have had no success.  Here's some info
if it's helpful:

I tried kernels 2.0.27 and 2.1.17.  I compiled all the features into
the kernels that the HOWTO suggests (I think).

I set up the host (the one actually connected to the internet via ppp)
with the following network related commands (in addition to a ppp
defaultroute):

  ifconfig lo 127.0.0.1
  route -add net 127.0.0.0 dev lo

  ifconfig eth0 192.168.1.1 netmask 255.255.255.0
  route -add net 192.168.1.0 dev eth0
  
  ipfwadm -F -p deny
  ipfwadm -F -a accept -m -S 192.168.1.0/24 -D 0.0.0.0/0 -W eth0

And I set up the client machine (connected via ethernet to the host)
with the following commands:

  ifconfig lo 127.0.0.1
  route -add net 127.0.0.0 dev lo

  ifconfig eth0 192.168.1.2 netmask 255.255.255.0 broadcast 192.168.1.255
  route add -net 192.168.1.0 netmask 255.255.255.0
  route add default gw 192.168.1.1 metric 1

This doesn't work.  I can ping the host from the client, and the
host can reach the internet via it's pppd defaultroute, but the client
cannot reach the internet, so the host is not forwarding the
masqueraded packets.

Is there some way to see what the host is doing with the packets?

Thanks for any help.
--

Maybe I don't get it right, but to me, it seems you're masquerading USING
your eth0-interface, instead of your ppp0-interface.. am I right?


// Remco van de Meent
//  email: [EMAIL PROTECTED]
//  www: http://cam053212.student.utwente.nl
//  -- Never make any mistaeks --


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Re: Setting up Masquerading on Debian machines.

1996-12-30 Thread Rob Browning
Remco van de Meent [EMAIL PROTECTED] writes:

 Maybe I don't get it right, but to me, it seems you're masquerading USING
 your eth0-interface, instead of your ppp0-interface.. am I right?

That's right.  I have a ppp connection from the host to the internet,
and a ethernet connection from the client to the host, so I'm
masquerading across the ethernet connection so that the client can
reach the internet.

--
Rob


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Re: Setting up Masquerading on Debian machines.

1996-12-30 Thread Remco van de Meent
At 01:00 PM 12/30/96 -0600, Rob Browning wrote:
Remco van de Meent [EMAIL PROTECTED] writes:

 Maybe I don't get it right, but to me, it seems you're masquerading USING
 your eth0-interface, instead of your ppp0-interface.. am I right?

That's right.  I have a ppp connection from the host to the internet,
and a ethernet connection from the client to the host, so I'm
masquerading across the ethernet connection so that the client can
reach the internet.


Yes, but what you want is masquerading the eth-iface using the ppp0-iface...

So what I suggest is the following:

ipfwadm -F -a masquerade -S 192.168.1.1 -D 0.0.0.0/0 -W ppp0



// Remco van de Meent
//  email: [EMAIL PROTECTED]
//  www: http://cam053212.student.utwente.nl
//  -- Never make any mistaeks --


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From miss
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On Mon, 30 Dec 1996, Remco van de Meent wrote:
 Maybe zmailer is another option? Seems to be very fast also...

Yes, this works well, but unfortunately there is no Debian package
available for it.  Is anyone working on such a thing?

Roy
[EMAIL PROTECTED]


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Re: Setting up Masquerading on Debian machines.

1996-12-30 Thread Scott Barker
Remco van de Meent said:
 Yes, but what you want is masquerading the eth-iface using the ppp0-iface...
 
 So what I suggest is the following:
 
 ipfwadm -F -a masquerade -S 192.168.1.1 -D 0.0.0.0/0 -W ppp0

I believe the -W option should only be used for -I and -O rules. Forwarding by
definition occurs across (at least) two interfaces, so limiting it to one
interface using -W doesn't make sense. Also, don't forget that 'ping' won't
work :) (use traceroute or telnet).


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