Internal Workstation Denied Access with ISA 2006



I have two internal networks connected using an internal router. The
networks are 10.10.0.0/16 and 10.20.0.0/16.

I have a Win2003 domain using an ISA 2006 as a firewall. I have been using
the internal net 10.10.0.0/16 for most of my network without a problem. I
recently added the 10.20.0.0/16 net.

I added the 10.20.0.0/16 net to the internal network on the ISA server.

Problem- workstations on the new 10.20.0.0/16 net cannot connect to the
Internet. They can connect to the servers and workstations on the
10.10.0./16 net but the ISA server is denying connections to the external
network.

When I look at the ISA log the ISA server is denying connections to the
Internet for workstations on the 10.20.0.0/16 internal network and is not
listing a firewall rule for the denial.

What is the problem and what can I do about it?



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