Cisco 2811 is trying to wrap all the traffic on itself?

Question

Cisco

There is a subject, with practically standard configuration, only the pptp server is lifted.
The network already has a gateway, and at the moment the tsiska is needed only as a test pptp.
But somehow, some time after connecting to the network, all hosts start using it as a default gateway (hosts from other segments stop pinging from devices, and when tracing with the first hop, everyone sends traffic to the cisco). How to disable this behavior?

Answer 1

no ip proxy-arp?

Answer 2

dhcp up on cisco?
The first thing that comes to mind is that you connected it to a common network, the computers received an address and a route from it. The tsiska itself does nothing, see sh run

Answer 3

I think the pptp client by default sets the server it connects to as the default gateway, you need to look at the settings on the client side