by hello i'm a newbie in the beautiful world of linux!
here it goes :
Same PC Red-Hat 8.0 FireWall/Server
eth0 DHCP =
DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes
HWADDR=00:05:5d:f3:f5:2b
USERCTL=no
PEERDNS=no
TYPE=Ethernet
eth1 192.168.0.1 =
DEVICE=eth1
BOOTPROTO=none
IPADDR=192.168.0.1
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes
HWADDR=00:05:5d:f3:f6:77
USERCTL=no
PEERDNS=no
TYPE=Ethernet
iptables :
here what i have put on a shell to configure my iptables :
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -F INPUT
iptables -F OUTPUT
iptables -F FORWARD
iptables -t nat -F POSTROUTING
iptables -t nat -F PREROUTING
iptables -t nat -F OUTPUT
iptables -t mangle -F POSTROUTING
iptables -t mangle -F PREROUTING
iptables -t mangle -F OUTPUT
iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -d 0/0 -j MASQUERADE
when i tested it :
iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
So it's seems ok for the Firewall iptables
My second PC is a Windows 2000
ip 192.168.0.3
gw 192.168.0.1
my dns are ok too
My third PC is Linux Mandrake
ip 192.168.0.2
gw 192.168.0.1
my dns are ok too
The problem is :
MY PC Firewall/server (eth0 - eth1) surf on the INternet without
problem
My second and third PC of my local network (windows 2000 + Linux) are
not surfing on the net!!! Why?
My cable are ok, all my PCs are pinging each other
i can ping
192.168.0.1
192.168.0.2
192.168.0.3
to all my PC (+ the broadcast)
So to resume : 1 PC is going to Internet and all my network PCs do not
go to Internet! on them i cannot ping IP and i cannot ping URL
(exemple i cannot ping xxx.xxx.xxx.xxx or www.linux.org) but on my PC
dhcp i can ping xxx.xxx.xxx.xxx. and ping www.linux.org!
Help me my world will be a better place! :-)
ps : i ahve a cable modem