Notebook as Internet client as well as router (for the other computers)

[David <david_moerike@arcor.de>]

Hello,

I have a MBO "eurobook" 8375 - equiv. to Mitac 8375, running Squeeze - 
the Internet connection through the Cable modem to "KabelBW" works fine.

However, I also want to connect the other computers through it (in the 
notebook is eth0 the built-in card and is connected to the Internet, 
eth2 to the LAN).

Please help me to find out if I forgot sth (for example a kernel 
module), or if I made sth. wrong, or if it isn't successful because of a 
bug.

eurobook-debian:/home/david# echo 1 > /proc/sys/net/ipv4/ip_forward
eurobook-debian:/home/david# cat /proc/sys/net/ipv4/ip_forward
1

eurobook-debian:/home/david# modprobe -v iptable_nat
insmod /lib/modules/2.6.26-2-686/kernel/net/netfilter/nf_conntrack.ko
insmod 
/lib/modules/2.6.26-2-686/kernel/net/ipv4/netfilter/nf_conntrack_ipv4.ko
insmod /lib/modules/2.6.26-2-686/kernel/net/netfilter/x_tables.ko
insmod /lib/modules/2.6.26-2-686/kernel/net/ipv4/netfilter/nf_nat.ko
insmod /lib/modules/2.6.26-2-686/kernel/net/ipv4/netfilter/ip_tables.ko
insmod /lib/modules/2.6.26-2-686/kernel/net/ipv4/netfilter/iptable_nat.ko
eurobook-debian:/home/david# iptables -A POSTROUTING -t nat -j MASQUERADE

eurobook-debian:/home/david# iptables -t nat --list-rules
-P PREROUTING ACCEPT
-P POSTROUTING ACCEPT
-P OUTPUT ACCEPT
-A POSTROUTING -j MASQUERADE

eurobook-debian:/home/david# iptables -t nat --list
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination        

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination        
MASQUERADE  all  --  anywhere             anywhere           

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination        

A ping to the other computers is successful. - On the other computer 
(there is also Squeeze running):

#route add default gw 169.254.195.183

To enter, for example, http://de.wikipedia.org in the browser, or a ping 
is not successful, even not a ping to 91.198.174.2 (that is the address 
at present time).

Again checking the modules on the notebook:

eurobook-debian:/home/david# lsmod |grep ip
iptable_filter          2624  0
ipt_MASQUERADE          2592  1
iptable_nat             4680  1
ip_tables              10160  2 iptable_filter,iptable_nat
nf_nat                 15544  2 ipt_MASQUERADE,iptable_nat
x_tables               13284  3 ipt_MASQUERADE,iptable_nat,ip_tables
nf_conntrack_ipv4      12268  3 iptable_nat,nf_nat
nf_conntrack           55540  4 
ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv4
ipv6                  235364  29
crypto_blkcipher       15236  1 ecb