Masquerade (Newbie)

[Richard A Downing <richard.downing@bcs.org.uk>]

I have followed the NAT-HOWTO to set up iptables1-2.6a with kernel 2.4.18,
using modules.

The iptables_nat module loads fine, but 

iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE

gives: iptables: No chain/target/match by that name

I've checked that the 'libipt_MASQUERADE.so' file is in /usr/lib/iptables.  If I command:
iptables -t nat -A POSTROUTING -o ppp0 -j SNAT --to 62.255.122.217
then this happens:

iptables -t nat --list
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination
SNAT       all  --  anywhere             anywhere           to:192.168.1.0

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

So now I'm stumped!

What I am attempting to do is to rpovide my other two machines on my
local LAN (192.168.1....) with internet access via 192.168.1.3 using ppp.
If I get this to the point where it works then it will be worth mu while buying
into broadband.

Sorry to be so stupid, all suggestions welcomed.

Richard