How does VPN server bridge client to rest of network?

If I setup a Windows 2016 VPN server, how do clients connecting to it get to access the rest of the network?
Is there something you’d configured on the VPN server to tell it to forward DNS requests?
Or does it forward connections back to the main outside firewall?
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Mal OsborneAlpha GeekCommented:
Usual practice is to have the VPN client machine obtain a DNS server from the VPN server. Typically, this is done via DHCP. Once connected, a client machine uses the DNS server on the site it is connected too, for all requests.

The client can be configured to either send ALL traffic down the VPN tunnel, or just the subnet in use, depending on what you want to do.
Qlemo"Batchelor", Developer and EE Topic AdvisorCommented:
In general there are two kind of VPN "servers":

On devices (like Cisco or Juniper) usually a transfer network is used, which is different from the LANs on both sides. Then all is based on routing. This works well if the "server" side device is the default gateway anyway.

Windows VPN server uses an IP pool either statically defined or fetched by DHCP. The former might give out IPs from a different or the same network, while latter always will provide LAN IPs.
Then it acts as an IP proxy, that is each traffic arriving from LAN for the VPN IP(s) are forwarded to the client, and incoming traffic is treated as it came from the VPN server machine itself.

As a side note: DNS, if provided with the VPN, needs to have priority over local DNS settings to be used. If it does not, only IP addresses can be used. But providing DNS with VPN also means that all DNS requests are forwarded to the VPN LAN, which might be considered as an information leak.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.