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D-Link M15 User Manual
Section 3 - Configuration
PPTP (continued)
If you select
Static IP
as the Address Mode:
PPTP IP Address
Enter the IP address provided by your ISP.
PPTP Subnet
Mask
Enter the subnet mask provided by your ISP.
PPTP Gateway IP
Address
Enter the gateway IP address provided by your ISP.
Primary DNS
Server
Enter the primary DNS server IP address assigned by your ISP.
Secondary DNS
Server
Enter the secondary DNS server IP address assigned by your ISP.
MTU
Maximum Transmission Unit (1280~1460) - you may need to change
the MTU for optimal performance with your ISP. The default is 1400.
Secure DNS
Enable this option to use public DNS with encryption via
DNS-over-HTTPS (DoH).
DNS over HTTP
Provider
Select the DNS-over-HTTPS (DoH) service provider: Google or
Cloudflare.
Allow Fall-back
Use your primary or secondary DNS server as an alternative if the
configured provider is not working.
Click
Save
when you are done.
