Help - "private" ip address conflict using ip masq.

Help - "private" ip address conflict using ip masq.

Post by David M. Ree » Thu, 18 Mar 1999 04:00:00




connection, with dhcp configured and working. I can get to the outside just
fine
from all the machines on my network (192.168.1.x).

The problem -
I was surfing the web when my NT machine kicked off the network with a
message
that it had detected a conflicting IP address on the network. My Linux box
is on
192.168.1.1 on one NIC for internal, and a dhcp assigned address on a 2nd
NIC for
my cable access, with my NT system at 192.168.1.2. The 192.168.1.x addresses
should not be getting out past my Linux box. When I rebooted, I tried to
telnet to my
Linux box, and instead connected to someone else's FreeBSD system.? Finally
it all
came back after powering off NT and restarted. I imagine there is a
frustrated FreeBSD
user out there as well! So, why are the "private" addresses getting to the
outside world,
where they can conflict?

I am using the following firewall rules:
ipfwadm -F -p deny
 ipfwadm -F -a accept -m -S 192.168.0.0/24 -D 0.0.0.0/0

Thanks.

David Reed

 
 
 

Help - "private" ip address conflict using ip masq.

Post by Leopold Toetsc » Fri, 19 Mar 1999 04:00:00


Hi,

=CUT

Quote:>192.168.1.1 on one NIC for internal, and a dhcp assigned address on a 2nd
=CUT
> ipfwadm -F -a accept -m -S 192.168.0.0/24 -D 0.0.0.0/0

192.168.0.0/24 a typo or shouldn't you masq 192.168.1.0/24 ???

leo

 
 
 

Help - "private" ip address conflict using ip masq.

Post by David Ree » Fri, 19 Mar 1999 04:00:00


Doh! It's a typo in my post - I am indeed masking 192.168.1.0.
Thanks for catching that.
Quote:>> ipfwadm -F -a accept -m -S 192.168.0.0/24 -D 0.0.0.0/0

>192.168.0.0/24 a typo or shouldn't you masq 192.168.1.0/24 ???

>leo

 
 
 

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