Ubuntu/Squid/NAT/IP Masquerading Problem

[10101010]

Current setup using Ubuntu 9.10/Squid/Dansguardian/NAT/IP Masquerading to act as a proxy all working fine, but I have a problem.

 

See extract from /etc/ufw/before.rules

 

# nat Table rules

*nat

:POSTROUTING ACCEPT [0:0]

#

# Forward traffic from eth1 through 0.

-A POSTROUTING -s 10.100.5.0/24 -o eth0 -j MASQUERADE

#

 

 

Should it be possible to add further POSTROUTING entries i.e

 

-A POSTROUTING -s 10.100.32.0/24 -o eth0 -j MASQUERADE

 

When I try this everything stops working.

 

Any advice welcome...