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...