Hi all
I am building a virtual lab consisting of a range of hosts, all with their individual jobs e.g. DNS, NTP, HTTP etc. and all of them are in a private subnet with no external access.
External access is provided via a VM connected to an internal and external network, which all the other machines are using as their default gateway.
This is working fine for net access, but so far my NTP server is not able to sync its time with internet-based NTP servers, and I realized that I actually have no idea what I'm doing.
Does anyone know of any good resources that will help me configure my NAT server/default gateway so that the services on the other boxes (prob DNS and NTP) can get what they need. The NAT server/default gateway is running IP tables, and is routing traffic between the two interfaces just fine. Specifically I am looking for information about what to add the rules that so far I have only ever had to add to the INPUT chain.
Hope that makes sense, rock on brethren!
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