I have a big problem with Global Protect and overlapping networks.
I make you an example.
My local network is 192.168.10.x
My Global Protect Network is 172.16.x.x
The external network has the same class of my local network
If I connect my lapton in any networks everything works good but if the network has the same class of my local network Global Protec Client on my laptop discover the "outside network" like extenal network (perfect thing) but if I try to access some service like webserver or Exchange I encounter connection error.
Can I resolve this specific situation? How?
Another think ... I can resolve and ping for example my internal DNS
Help me please ....
Solved! Go to Solution.
This is by design: if the GP client is located in a network that is identical to the one used in the VPN tunnel (let's call it localnet vs officenet) all traffic will be pushed into the tunnel
If the localnet is a subnet of officenet (so localnet/24 vs officenet/21) the more specific network will "win" the route so local resources remain reachable
In this case if there is an IP overlap where a local resource uses the same IP as a remote resource, the local resource will be reachable and the remote not.
In case of an identical subnet (/24 vs/24) remote resources will be available while local ones will not be
A couple places to look for a problem.
Could you upload images of your vrouter and interfaces?
Also, make sure that your IP pool that you are assigning clients from GP is not the same network as your internal resources. It has to be something different.
Yes ... but only some address. For Example the DNS server works good.
I think I've find the error. I've missed the Access Route in Gateway configuration.
If I use 0.0.0.0/0 or leave everything blank I have the overlapping problem.
If I submit my network class everything works but I cannot block for example the web-browsing because I bypass my firewall for navigation.
No not necessarily. For instance, I have 2 rules on my Vrouter for 172 and 192 addresses that point them from my external interface to my internal gateway.
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