HI, Problem get firewall going.
ubuntu at butterflystitches.com.au
Mon Jul 31 09:05:23 BST 2006
Michael Chesterton wrote:
> Neil Dugan <ubuntu at butterflystitches.com.au> writes:
>>Hi I am new to this list, if this is the wrong place to ask let me know.
>>I have setup a ubuntu box for internet access and also as a firewall.
>> I can get on the internet from the firewall computer. :) From the
>>other computer I can ping both interfaces of the firewall (i.e. eth0
>>and eth1). :)
>>But I can't ping the modem @ 192.168.1.1 :(
> First thought is the modem doesn't have a route for
> 192.168.5/24. But I'm not sure if the firewall is masquerading.
As far as I can tell it isn't doing anything as no packet info is logged
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
192.168.0.0 * 255.255.0.0 U 0 0
default 192.168.5.254 0.0.0.0 UG 0 0
>>The eth1 interface of the firewall does report receiving bytes (via.
>>ifconfig) but I can't trace where that info is going. I put lots of
>>LOG actions in the iptables to find out where the ping was going but
>>none of them report anything. The program ethereal says the eth1
>>interface is receiving lots of ARP requests for 192.168.1.1 but no
>>answers are sent.
> I don't think eth1 of the firewall should be be receiving arp requests
> for 192.168.1.1, sounds like the computer thinks 192.168.1.1 is
> directly connected to it's network, not via 192.168.5.254
Any way I can find out?
I might have configured the DHCP wrong.
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