Kerio Tech KERIO WINROUTE FIREWALL 6 - Manual (Page 285)

23.1 VPN Server Configuration
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Figure 23.2 VPN server settings — basic parameters
The action will be applied upon clicking the Apply button in the Interfaces tab.
IP address assignment
Specification of a subnet (i.e. IP address and a corresponding network mask) from which
IP addresses will be assigned to VPN clients and to remote endpoints of VPN tunnels
which connect to the server (all clients will be connected through this subnet).
By default (upon the first start-up after installation), WinRoute automatically selects a free
subnet which will be used for VPN. Under usual circumstances, it is not necessary to
change the default subnet. After the first change in VPN server settings, the recently
used network is used (the automatic detection is not performed again).
Warning
Make sure that the subnet for VPN clients does not collide with any local subnet!
WinRoute can detect a collision of the VPN subnet with local subnets. The collision may
arise when configuration of a local network is changed (change of IP addresses, addition
of a new subnet, etc.), or when a subnet for VPN is not selected carefully. If the VPN
subnet collides with a local network, a warning message is displayed upon saving of the
settings (by clicking Apply in the Interfaces tab). In such cases, redefine the VPN subnet.
Figure 23.3 VPN server — detection of IP collision
It is recommended to check whether IP collision is not reported after each change in
configuration of the local network or/and of the VPN!
Notes:
1. Under certain circumstances, collision with the local network might also arise when
a VPN subnet is set automatically (if configuration of the local network is changed