ipmasquerading question

[Gagneraud Christian <christian.gagneraud@numericable.fr>]

Hi all,

I've just install woody on my ultrasparc1, i've setup my internet
connection on it using dhcp on eth0 (cable modem), but now i want to
make my sun station a gateway.
I've tried to setup ipmasquerading with iptables, as i've not very
experience with Linux/networks 'until now i've used Mandrake and Suse
for desktop. So i'v follow instruction found at
http://newbiedoc.sourceforge.net/tutorials/homegateway

but unfortunately it doesn't work well:
- on my sparc 
  - i can ping www.google.fr (etrh0)
  - i can ping internal network 192.168.1.xxx (eth1)
  - i have messages like "ipconntrack table full droping"
  - lsmod
=>    ipt_MASQUERADE 	... 0 (unused)
    iptable_nat		... 0 [ipt_MASQ...]
    ipconntrak		... 1 [ipt_MASQ.. iptable_nat]
    ip_tables		... 4 [ipt_MASQ.. iptable_nat]
  - iptables -L
=>    can't initialize iptables table 'filter': Table does not exist...
  - iptables -t nat -L
=>    empty tables....

- on my desktop
  - i can ping my sparc by its IP 192.168.1.1
  - i can ping my sparc internet side with its IP
  - i can't ping google.fr (my /etc/resolv.conf is good _ same as my
sparc)
  - ethereal show a lot of request (from my desktop) on internet ip
address family and lot of arp request on my local net (from my desktop)
(who has 192.168.1.xxx...)

Another question is thatr i want to make my sparc a firewall too, is
there in debian woody specifics packages to do that?

has anyone any tips?

thanks
Christian