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Do I Need a Separate Subnet for a VPN?

 
 
razor
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      11-04-2005, 10:45 PM
Hello--

We just installed a SonicWALL firewall in our remote office and configured a
VPN tunnel to our PIX firewall in the main office. It is all working great.

I am about to set up a 1 2 1 NAT on the SonicWALL and wondered if I need
to/should set up a separate subnet on our domain for this office?

We only have one domain and one site. We are only about 50 users total, and
only 3 IPs will be used in the remote office. We want the workstations in the
remote office be able to take advantage of some of our enterprise solutions
and group policies on the domain.

I want the 3 workstations in the remote office to have their IPs and DNS
static and not utilize our DHCP server.

What is the best practice on this?

Thank you,

Stephen
 
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razor
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      11-05-2005, 12:51 AM
I failed to mention all of our servers are running Windows Server 2003 and
our workstations Windows XP Pro....

"razor" wrote:

> Hello--
>
> We just installed a SonicWALL firewall in our remote office and configured a
> VPN tunnel to our PIX firewall in the main office. It is all working great.
>
> I am about to set up a 1 2 1 NAT on the SonicWALL and wondered if I need
> to/should set up a separate subnet on our domain for this office?
>
> We only have one domain and one site. We are only about 50 users total, and
> only 3 IPs will be used in the remote office. We want the workstations in the
> remote office be able to take advantage of some of our enterprise solutions
> and group policies on the domain.
>
> I want the 3 workstations in the remote office to have their IPs and DNS
> static and not utilize our DHCP server.
>
> What is the best practice on this?
>
> Thank you,
>
> Stephen

 
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Bill Grant
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      11-05-2005, 10:05 PM
It depends on how you set up the VPN. If each user has an individual VPN
connection, there is no need to make any changes in AD sites. You would only
need to do that if they were connected by a site-to-site VPN and there was a
DC at the second site. In that case it would be a good idea to set up a
second site in AD (on its own subnet) and move the remote machines into that
site.

razor wrote:
> I failed to mention all of our servers are running Windows Server
> 2003 and our workstations Windows XP Pro....
>
> "razor" wrote:
>
>> Hello--
>>
>> We just installed a SonicWALL firewall in our remote office and
>> configured a VPN tunnel to our PIX firewall in the main office. It
>> is all working great.
>>
>> I am about to set up a 1 2 1 NAT on the SonicWALL and wondered if I
>> need to/should set up a separate subnet on our domain for this
>> office?
>>
>> We only have one domain and one site. We are only about 50 users
>> total, and only 3 IPs will be used in the remote office. We want the
>> workstations in the remote office be able to take advantage of some
>> of our enterprise solutions and group policies on the domain.
>>
>> I want the 3 workstations in the remote office to have their IPs and
>> DNS static and not utilize our DHCP server.
>>
>> What is the best practice on this?
>>
>> Thank you,
>>
>> Stephen



 
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razor
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      11-06-2005, 12:27 AM
There is no Domain Controller in the remote office--actually there are no
servers at all. There is one single VPN tunnel between firewalls.

What do you think?
--
Stephen


"Bill Grant" wrote:

> It depends on how you set up the VPN. If each user has an individual VPN
> connection, there is no need to make any changes in AD sites. You would only
> need to do that if they were connected by a site-to-site VPN and there was a
> DC at the second site. In that case it would be a good idea to set up a
> second site in AD (on its own subnet) and move the remote machines into that
> site.
>
> razor wrote:
> > I failed to mention all of our servers are running Windows Server
> > 2003 and our workstations Windows XP Pro....
> >
> > "razor" wrote:
> >
> >> Hello--
> >>
> >> We just installed a SonicWALL firewall in our remote office and
> >> configured a VPN tunnel to our PIX firewall in the main office. It
> >> is all working great.
> >>
> >> I am about to set up a 1 2 1 NAT on the SonicWALL and wondered if I
> >> need to/should set up a separate subnet on our domain for this
> >> office?
> >>
> >> We only have one domain and one site. We are only about 50 users
> >> total, and only 3 IPs will be used in the remote office. We want the
> >> workstations in the remote office be able to take advantage of some
> >> of our enterprise solutions and group policies on the domain.
> >>
> >> I want the 3 workstations in the remote office to have their IPs and
> >> DNS static and not utilize our DHCP server.
> >>
> >> What is the best practice on this?
> >>
> >> Thank you,
> >>
> >> Stephen

>
>
>

 
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Bill Grant
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      11-06-2005, 08:02 AM
I thik you can ignore AD sites. The clients will need to log on to a DC
at the main site, so there is nothing to be gained.

razor wrote:
> There is no Domain Controller in the remote office--actually there
> are no servers at all. There is one single VPN tunnel between
> firewalls.
>
> What do you think?
>
>> It depends on how you set up the VPN. If each user has an
>> individual VPN connection, there is no need to make any changes in
>> AD sites. You would only need to do that if they were connected by a
>> site-to-site VPN and there was a DC at the second site. In that case
>> it would be a good idea to set up a second site in AD (on its own
>> subnet) and move the remote machines into that site.
>>
>> razor wrote:
>>> I failed to mention all of our servers are running Windows Server
>>> 2003 and our workstations Windows XP Pro....
>>>
>>> "razor" wrote:
>>>
>>>> Hello--
>>>>
>>>> We just installed a SonicWALL firewall in our remote office and
>>>> configured a VPN tunnel to our PIX firewall in the main office. It
>>>> is all working great.
>>>>
>>>> I am about to set up a 1 2 1 NAT on the SonicWALL and wondered if I
>>>> need to/should set up a separate subnet on our domain for this
>>>> office?
>>>>
>>>> We only have one domain and one site. We are only about 50 users
>>>> total, and only 3 IPs will be used in the remote office. We want
>>>> the workstations in the remote office be able to take advantage of
>>>> some of our enterprise solutions and group policies on the domain.
>>>>
>>>> I want the 3 workstations in the remote office to have their IPs
>>>> and DNS static and not utilize our DHCP server.
>>>>
>>>> What is the best practice on this?
>>>>
>>>> Thank you,
>>>>
>>>> Stephen



 
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razor
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      11-06-2005, 11:35 PM
OK, thanks. I'll just exclude their IPs from the DHCP server in the main
office and keep them on the same domain, site and subnet.

sd

"Bill Grant" wrote:

> I thik you can ignore AD sites. The clients will need to log on to a DC
> at the main site, so there is nothing to be gained.
>
> razor wrote:
> > There is no Domain Controller in the remote office--actually there
> > are no servers at all. There is one single VPN tunnel between
> > firewalls.
> >
> > What do you think?
> >
> >> It depends on how you set up the VPN. If each user has an
> >> individual VPN connection, there is no need to make any changes in
> >> AD sites. You would only need to do that if they were connected by a
> >> site-to-site VPN and there was a DC at the second site. In that case
> >> it would be a good idea to set up a second site in AD (on its own
> >> subnet) and move the remote machines into that site.
> >>
> >> razor wrote:
> >>> I failed to mention all of our servers are running Windows Server
> >>> 2003 and our workstations Windows XP Pro....
> >>>
> >>> "razor" wrote:
> >>>
> >>>> Hello--
> >>>>
> >>>> We just installed a SonicWALL firewall in our remote office and
> >>>> configured a VPN tunnel to our PIX firewall in the main office. It
> >>>> is all working great.
> >>>>
> >>>> I am about to set up a 1 2 1 NAT on the SonicWALL and wondered if I
> >>>> need to/should set up a separate subnet on our domain for this
> >>>> office?
> >>>>
> >>>> We only have one domain and one site. We are only about 50 users
> >>>> total, and only 3 IPs will be used in the remote office. We want
> >>>> the workstations in the remote office be able to take advantage of
> >>>> some of our enterprise solutions and group policies on the domain.
> >>>>
> >>>> I want the 3 workstations in the remote office to have their IPs
> >>>> and DNS static and not utilize our DHCP server.
> >>>>
> >>>> What is the best practice on this?
> >>>>
> >>>> Thank you,
> >>>>
> >>>> Stephen

>
>
>

 
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