Question: same network addr. range on both end ?

[jp]

Archived from groups: comp.dcom.vpn (More info?)

Hello

With the first configuration below, I cannot connect to workstations on the office network through VPN. I do see the workstations in the network neighborhood, but I can't ping
any of them. If I change my local Lan IP to a range different than the one used on the office LAN, everything works fine.

Could someone tell me if this is just normal behavior, or is it a bad configuration or a bad routing or a bad something else? If it's normal, I will resignate, but if there is something to
do to correct it, I would gladly welcome some hints.


1) This doesn't work.

The network at the office is set up with 192.168.0.*
The vnp server (windows server) delivers addresses through DHCP in the range 10.1.0.*
My LAN at home also uses IP addresses like 192.168.0.*


2) This works fine

Same setup as above but my LAN at home uses IP addresses like 192.168.1.* or any other address range.


Thanks

JP Tanguay
jp.keinspam.tanguay@sympatico.ca (drop .keinspam)

 

[Guest]

Archived from groups: comp.dcom.vpn (More info?)

jp@nospam.com wrote:
> Hello
>
> With the first configuration below, I cannot connect to workstations on the office network through VPN. I do see the workstations in the network neighborhood, but I can't ping
> any of them. If I change my local Lan IP to a range different than the one used on the office LAN, everything works fine.
>
> Could someone tell me if this is just normal behavior, or is it a bad configuration or a bad routing or a bad something else? If it's normal, I will resignate, but if there is something to
> do to correct it, I would gladly welcome some hints.
>
>
> 1) This doesn't work.
>
> The network at the office is set up with 192.168.0.*
> The vnp server (windows server) delivers addresses through DHCP in the range 10.1.0.*
> My LAN at home also uses IP addresses like 192.168.0.*
>
>
> 2) This works fine
>
> Same setup as above but my LAN at home uses IP addresses like 192.168.1.* or any other address range.
>
>
> Thanks
>
> JP Tanguay
> jp.keinspam.tanguay@sympatico.ca (drop .keinspam)
>
>

This is the correct behaviour. If you use the same IP's on the local
and remote subnet then you either have to renumber one of the subnets or
use NAT to translate the IP's of the remote subnet to hide the numbering
collision.

Because the defaults of most routers are set to 192.168.0.x or
192.168.1.x I suggest that renumbering the work subnet to anything else
would be a good long term plan. Perhaps renumbering to the 10.1.0.x is
a good idea, very few home routers give out IP's using this range of
private addresses.



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