[Gllug] hello, and a NAT problem

[lists]

Hello, Im Julian, Ive just upgraded to London & Linux. I hope that this is 
an appropriate place to air my dumb questions... 

PROBLEM with NAT 

This is what I have done to try get this mandrake 9.2 (2.4.22) to share a 
dsl connection across the wireless lan:
# echo "1" > /proc/sys/net/ipv4/ip_forward
# iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE 

Now, most services work: I can do dns lookups on tiscali's dns from the 
clients, I can fetch an email from a pop3 server from the clients, I can 
ping, traceroute etc. But /most/ of the web times out (I can do google 
searches and open some other near, fast sites that I have definitely not 
been to before). On some sites, I can open some pages, but not others. And 
if I a client has more than one pop3 message waiting, the mail client times 
out. 

I don't know how to start with this one -- can anyone point me in the right 
direction? 

thanks for your time, 

Julian 

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