Issue with access lan when remote network is the same subnet

[outlet]

Hello,

I am using iOS with OpenVPN connect.  Over cellular I can browse the internet just fine and access local resources, but if I am on a public hotspot with the same subnet as my home network it will always resolve to the remote network resources.

LAN: 10.0.0.0/255.255.0.0
OpenVPN network: 10.140.0.0/16
Example remote network 10.0.0.0/255.0.0.0

I have force all traffic enabled and I push my local network in the advanced server settings.

Is there any way to get OpenVPN to default to my LAN?

Thanks!

[phil.davis]

Yes, that is an issue. If the network you are at (coffee shop, university…) happens to use a subnet that overlaps with your home subnet then there is trouble. If you are somewhere that has used 10.0.0.0/8 then that is a big pain! People should be setting up their networks with just small parts of that - 10.20.30.0/24 etc. Try to pick what you think is an obscure piece of private IP address space - 172.17.42.0/24 ... - for your home LAN and for the OpenVPN tunnel network.

[doktornotor]

@phil.davis:

People should be setting up their networks with just small parts of that - 10.20.30.0/24 etc.

Hey, that's already taken by me, leave it alone!  ;D

[johnpoz]

^ hehehehe, how can you be using it.. I am using it ;)

[heper]

you can 1:1 NAT your home-lan to a "virtual" subnet over your vpn.

for example:

hotspot_your_ip = 10.0.0.200
lan_host_you_wish_to_reach = 10.0.0.100    <<–- routing issue
1:1 NAT your home_lan to 172.18.1.0/24  -------- from hotspot_your_ip you'd then connect to to 172.16.1.100 | and the NAT would have you end up on 10.0.0.100    <<--- routing issue "solved"

i have a couple of sites where changing the lan-subnets is a ton of work (static ip's). I've used this method to circumvent possible routing issues