Re: [MLUG] IP forwarding

[Mikhail Kovalenko <EMAIL:PROTECTED>]

"Borders-Wing, Heath Justin (UMC-Student)" wrote:
>
> I'm trying to distribute my cable connection to the computers on my LAN...
> ... I guess the short version is, how exactly do I get ipfwadm working?

I never used ipfwadm, and I don't know if Mandrake 8 even comes with it.
But I didn't need it to set up IP forwarding. From yoda's rc.firewall,
the most important parts you really need are (just to get it going):

# CRITICAL:  Enable IP forwarding (disabled by default)
echo "1" > /proc/sys/net/ipv4/ip_forward

# Enable simple IP forwarding and Masquerading
/sbin/ipchains -P forward DENY
# Denies all packets, except those from your internal network
/sbin/ipchains -A forward -s 192.168.1.0/24 -j MASQ

where 192.168.1.0 is your internal network (netmask 255.255.255.0
assumed).

To enable IP forwarding permanently, edit /etc/sysctl.conf to include

net.ipv4.ip_forward=1
net.ipv4.ip_always_defrag = 1 (needed for masquerading)

Good luck,
-- 
Misha
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