mario@buntor:/etc/ppp/ip-up.d$ cat /etc/iptables.ppp.conf 
# Generated by iptables-save v1.2.11 on Sun Jul  3 00:38:18 2005
*nat
:PREROUTING ACCEPT [4188:629096]
:POSTROUTING ACCEPT [12158:725198]
:OUTPUT ACCEPT [14040:1087085]
-A POSTROUTING -o ppp0 -j MASQUERADE 
-A POSTROUTING -o ppp0 -j MASQUERADE 
-A POSTROUTING -o ppp0 -j MASQUERADE 
-A POSTROUTING -o ppp0 -j MASQUERADE 
-A POSTROUTING -o ppp0 -j MASQUERADE 
-A POSTROUTING -o ppp0 -j MASQUERADE 
-A POSTROUTING -o ppp0 -j MASQUERADE 
COMMIT
# Completed on Sun Jul  3 00:38:18 2005
# Generated by iptables-save v1.2.11 on Sun Jul  3 00:38:18 2005
*filter
:INPUT ACCEPT [1534875:218359420]
:FORWARD ACCEPT [25414:9503912]
:OUTPUT ACCEPT [1511340:192531545]
-A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1400:1536 -j TCPMSS --clamp-mss-to-pmtu 
-A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1400:1536 -j TCPMSS --clamp-mss-to-pmtu 
-A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1400:1536 -j TCPMSS --clamp-mss-to-pmtu 
-A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1400:1536 -j TCPMSS --clamp-mss-to-pmtu 
-A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1400:1536 -j TCPMSS --clamp-mss-to-pmtu 
COMMIT
# Completed on Sun Jul  3 00:38:18 2005
mario@buntor:/etc/ppp/ip-up.d$