AD sites and internet connectivity requirements

Hi All,
I am looking on setting up several AD sites on my lab environment. I run 2 physical Hyper-V servers in 2 sites. Per my understanding, 1 (or at least 1) DC in each site must be a bridgehead server to replicate out to other sites (inter).
For security reasons, my DCs have no internet connection but are on a private IP. They are not multi-homed. So for a >1 site setup to work, does this mean one DC must have an internet connection to talk to DCs in other sites? Is this not a bad practice?
Likewise, if I give the DC a 2nd NIC for internet connectivity, isn't this a bad idea?
Any guidance much appreciated.
Thanks

As long as you have routing enabled between your sites there is no need to establish internet connection on DC's. Also it is not recommend to have internet connection on DC's from security perspective. In addition I myself, never recommend to have multiple
NIC's on your DC's, you can configure a gateway between different subnets and use it in order to connect different subnets to each other.
Regards.
Mahdi Tehrani Loves Powershell
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and helpfull to other poeple.

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Bertrand POURCEL wrote:
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