VPN IP conflict

Hi,
I am new to working on VPN's but i set one up and I am able to connect from
my home network fine. A co-worker of mine cannot connect from his home
network, after some troubleshooting i found he was on the same 10.x.x.x
network range as our internal one which is why i believe he is having the
issues.

1st off, what exactly happens in this circumstances? (for personal
knowledge). And 2ndwhat is the best way to fix? I could set his home
network back to 192.168.x.x. He does have alot of home users but they should
all resolve in that range fine or is there another work around?

Thank you in advance...
Matt

That is an issue. The result is he will have issues connecting to certain
PCs or servers on your network through the VPN if they have the same
address, ie. he has a PC at 10.10.10.25 on his home LAN and you also have a
PC or server with the same address.

The fix, as you noted, is to have him change his address space to something
else. It could be a simple as one octet off, ie. 10.10.11.X for example. If
his clients are all DHCP assigned then they will not notice a difference. If
he has static IPs for some of his clients then he needs to manually make the
appropriate changes.

--

Al Jarvi (MS-MVP Windows – Desktop User Experience)

Please post *ALL* questions and replies to the news group for the
mutual benefit of all of us...
The MS-MVP Program - http://mvp.support.microsoft.com
This posting is provided "AS IS" with no warranties, and confers no
rights...
How to ask a question
http://support.microsoft.com/KB/555375

"Matt" <Matt@discussions.microsoft.com> wrote in message
news:B83F917A-F45C-470D-9D12-86A1A76D1061@microsoft.com...
> Hi,
> I am new to working on VPN's but i set one up and I am able to connect
> from
> my home network fine. A co-worker of mine cannot connect from his home
> network, after some troubleshooting i found he was on the same 10.x.x.x
> network range as our internal one which is why i believe he is having the
> issues.
>
> 1st off, what exactly happens in this circumstances? (for personal
> knowledge). And 2ndwhat is the best way to fix? I could set his home
> network back to 192.168.x.x. He does have alot of home users but they
> should
> all resolve in that range fine or is there another work around?
>
> Thank you in advance...
> Matt

Thanks for your response.

Okay, i had him change to the 192.168.x.x range but we are still having the
problem which lead me to want to change his ip range in the 1st place.

He cannot get email form our exchange server when networked @ home through
the VPN. Mine works fine as well as a few other co-workers but his gets says
"offline" and will not open outlook. The VPN connects, he can get file,
connect to drives... etc... but when (set up the same as me) he cannot get
email when outlook is open.

"Sooner Al [MVP]" wrote:

> That is an issue. The result is he will have issues connecting to certain
> PCs or servers on your network through the VPN if they have the same
> address, ie. he has a PC at 10.10.10.25 on his home LAN and you also have a
> PC or server with the same address.
>
> The fix, as you noted, is to have him change his address space to something
> else. It could be a simple as one octet off, ie. 10.10.11.X for example. If
> his clients are all DHCP assigned then they will not notice a difference. If
> he has static IPs for some of his clients then he needs to manually make the
> appropriate changes.
>
> --
>
> Al Jarvi (MS-MVP Windows – Desktop User Experience)
>
> Please post *ALL* questions and replies to the news group for the
> mutual benefit of all of us...
> The MS-MVP Program - http://mvp.support.microsoft.com
> This posting is provided "AS IS" with no warranties, and confers no
> rights...
> How to ask a question
> http://support.microsoft.com/KB/555375
>
> "Matt" <Matt@discussions.microsoft.com> wrote in message
> news:B83F917A-F45C-470D-9D12-86A1A76D1061@microsoft.com...
> > Hi,
> > I am new to working on VPN's but i set one up and I am able to connect
> > from
> > my home network fine. A co-worker of mine cannot connect from his home
> > network, after some troubleshooting i found he was on the same 10.x.x.x
> > network range as our internal one which is why i believe he is having the
> > issues.
> >
> > 1st off, what exactly happens in this circumstances? (for personal
> > knowledge). And 2ndwhat is the best way to fix? I could set his home
> > network back to 192.168.x.x. He does have alot of home users but they
> > should
> > all resolve in that range fine or is there another work around?
> >
> > Thank you in advance...
> > Matt
>

On Mon, 23 Jun 2008 12:06:01 -0700, Matt <Matt@discussions.microsoft.com>
wrote:

>He cannot get email form our exchange server when networked @ home through
>the VPN. Mine works fine as well as a few other co-workers but his gets says
>"offline" and will not open outlook. The VPN connects, he can get file,
>connect to drives... etc... but when (set up the same as me) he cannot get
>email when outlook is open.
>

Check settings in Options | E-mail Accounts | More Settings... | General.
Make sure it's set up for proper exchange server and automatic detection of
connection state. Connection tab also should have "Connect using phone
line" and the intended VPN should be the dial up connection listed if you
are using Microsoft's VPN.

Thank you Geoff.
It seeems we now get email to his computer.

"Geoff" wrote:

> On Mon, 23 Jun 2008 12:06:01 -0700, Matt <Matt@discussions.microsoft.com>
> wrote:
>
> >He cannot get email form our exchange server when networked @ home through
> >the VPN. Mine works fine as well as a few other co-workers but his gets says
> >"offline" and will not open outlook. The VPN connects, he can get file,
> >connect to drives... etc... but when (set up the same as me) he cannot get
> >email when outlook is open.
> >
>
> Check settings in Options | E-mail Accounts | More Settings... | General.
> Make sure it's set up for proper exchange server and automatic detection of
> connection state. Connection tab also should have "Connect using phone
> line" and the intended VPN should be the dial up connection listed if you
> are using Microsoft's VPN.
>