Home user needs to connect to Cisco VPNC via IPsec to access corporate network.
At his home, user connected to service provider using ethernet and private addressing 192.168.6.0/24.
To access an Internet, service provider requires user to establish PPTP to providers' server with address 192.168.1.1 via default gateway 192.168.6.254,
then user acquires public IP address.
After PPTP establishment, routing table changes.
Default gw points to PPTP peer,
except the host route to PPTP tunnel endpoint 192.168.1.1,
which still go via 192.168.6.254.
When user starts Cisco VPN Client,
he is successfully authenticated and establishes SA,
but Cisco VPN Client discards host route to PPTP endpoint (i.e. 192.168.1.1).
And after a small timeout both connection drop, PPTP and IPsec.
Is there any workaround for such a trouble?