Private IP addresses in iptables
I am using iptables to setup a very simple DiffServ router to be used in a research testbed. The testbed is an isolated set of computers each assigned private IP addresses, as none of them are connected to the internet. When i try to add iptable rules using these IP addresses, rfc1918.blackhole.iana.org is listed in the source and destination address fields.
RFC 1918 describes the use of private IP addresses, so I assume this means that you cannot use private addresses for iptable rules. (This makes sense because these addresses should'nt be routed or routable). However for my isolated test scenario it makes sense to use private addresses. Is there any way to get around this?
Also when I last used iptables (2 years ago) this was not a problem and I assume it is an added feature. I am using iptables 1.3.5.
thanks in advance,