VPN question - which settings used when?

This question is in reference to which tcp/ip settings are used when, when
you have both your internal NIC and a dialup connection such as a VPN.

example: myNIC
IP: 192.168.1.100
SM: 255.255.255.0
DG: 192.168.1.1
DNS: 192.168.1.1

normally, thats it. I use the machine to surf the web and access local lan
resources.

after connected to VPN I have myNIC as shown above AND the VPN adapter
config like so:
IP: 10.10.0.100
SM: 255.255.0.0
DG: 10.10.0.1
DNS: 10.10.0.9

or whatever... these are not my actual settings but should do fine for the
example. So now an ipconfig command will show you have 2 seperate adapters
operating with tcp/ip settings assigned.

What happens then after I connect to a VPN wich essentially makes me a node
on 2 networks at the same time.. my local lan and the remote VPN lan. More
specifically lets say I try to access a UNC path like so
\\servername\sharename. Which adapter is used? both? then which one is used
first? Likewise what if I try to browse to www.yahoo.com in internet
explorer? which adapter is used? both? if so, again which one first? Does
one fail and then the next one gets tried automatically? When I say which
adapter I mean which gateway and DNS server are tried to resolve the name
and route etcc?? And if someone can enlighten me on this subject please
note, if you know, any difference in this behavior between 2k/xp/2k3.

any info is appreciated. Thanks.

It the setting "Use Gateway on remote network" is enabled in the VPN Dial-up
settings the VPN link becomes your "default gateway" and will be used for
any traffic that isn't destine for you local LAN. If this setting is not
enabled then only VPN traffic destine for the one particular VPN subnet will
go over the VPN while everything else behaves that same as it would if the
VPN was not active.

254231 - Change in Remote Access Route Behavior with Windows 2000
http://support.microsoft.com/default...b;en-us;254231

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com


"djc" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> This question is in reference to which tcp/ip settings are used when, when
> you have both your internal NIC and a dialup connection such as a VPN.
>
> example: myNIC
> IP: 192.168.1.100
> SM: 255.255.255.0
> DG: 192.168.1.1
> DNS: 192.168.1.1
>
> normally, thats it. I use the machine to surf the web and access local lan
> resources.
>
> after connected to VPN I have myNIC as shown above AND the VPN adapter
> config like so:
> IP: 10.10.0.100
> SM: 255.255.0.0
> DG: 10.10.0.1
> DNS: 10.10.0.9
>
> or whatever... these are not my actual settings but should do fine for the
> example. So now an ipconfig command will show you have 2 seperate adapters
> operating with tcp/ip settings assigned.
>
> What happens then after I connect to a VPN wich essentially makes me a
node
> on 2 networks at the same time.. my local lan and the remote VPN lan. More
> specifically lets say I try to access a UNC path like so
> \\servername\sharename. Which adapter is used? both? then which one is
used
> first? Likewise what if I try to browse to www.yahoo.com in internet
> explorer? which adapter is used? both? if so, again which one first? Does
> one fail and then the next one gets tried automatically? When I say which
> adapter I mean which gateway and DNS server are tried to resolve the name
> and route etcc?? And if someone can enlighten me on this subject please
> note, if you know, any difference in this behavior between 2k/xp/2k3.
>
> any info is appreciated. Thanks.
>
>

Thanks for the reply. Makes sense.

"Phillip Windell" <@.> wrote in message
news:(E-Mail Removed)...
> It the setting "Use Gateway on remote network" is enabled in the VPN
Dial-up
> settings the VPN link becomes your "default gateway" and will be used for
> any traffic that isn't destine for you local LAN. If this setting is not
> enabled then only VPN traffic destine for the one particular VPN subnet
will
> go over the VPN while everything else behaves that same as it would if the
> VPN was not active.
>
> 254231 - Change in Remote Access Route Behavior with Windows 2000
> http://support.microsoft.com/default...b;en-us;254231
>
> --
>
> Phillip Windell [MCP, MVP, CCNA]
> www.wandtv.com
>
>
> "djc" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > This question is in reference to which tcp/ip settings are used when,
when
> > you have both your internal NIC and a dialup connection such as a VPN.
> >
> > example: myNIC
> > IP: 192.168.1.100
> > SM: 255.255.255.0
> > DG: 192.168.1.1
> > DNS: 192.168.1.1
> >
> > normally, thats it. I use the machine to surf the web and access local
lan
> > resources.
> >
> > after connected to VPN I have myNIC as shown above AND the VPN adapter
> > config like so:
> > IP: 10.10.0.100
> > SM: 255.255.0.0
> > DG: 10.10.0.1
> > DNS: 10.10.0.9
> >
> > or whatever... these are not my actual settings but should do fine for
the
> > example. So now an ipconfig command will show you have 2 seperate
adapters
> > operating with tcp/ip settings assigned.
> >
> > What happens then after I connect to a VPN wich essentially makes me a
> node
> > on 2 networks at the same time.. my local lan and the remote VPN lan.
More
> > specifically lets say I try to access a UNC path like so
> > \\servername\sharename. Which adapter is used? both? then which one is
> used
> > first? Likewise what if I try to browse to www.yahoo.com in internet
> > explorer? which adapter is used? both? if so, again which one first?
Does
> > one fail and then the next one gets tried automatically? When I say
which
> > adapter I mean which gateway and DNS server are tried to resolve the
name
> > and route etcc?? And if someone can enlighten me on this subject please
> > note, if you know, any difference in this behavior between 2k/xp/2k3.
> >
> > any info is appreciated. Thanks.
> >
> >
>
>