I’ve set up Anywhere Access on my Essentials 2012 R2 server including the VPN option. However, when I try to connect, the connection fails and I get error 20253 on the server:
Log Name: System
Source: RemoteAccess
Event ID: 20253
Task Category: None
Level: Error
Keywords: Classic
Description: RoutingDomainID- {00000000-0000-0000-0000-000000000000}: CoId={6EB7B9C7-1DA5-4CA9-BF23-2C7880052E31}: The user mydomain\myuser connected to port VPN1-49 has been disconnected because no network protocols were successfully negotiated.
Checking the Routing and Remote Access (RRAS) setup, I see that it is by default set up to get IP addresses from the DHCP server, which is my router. Apparently that process, described on Technet here, doesn’t work. If I assign a static address range, the VPN starts working again.
Unfortunately, every time I update anything in Anywhere Access, e.g. to update the certificate, it seems to wipe out this static range. Ironically, if I go to Anywhere Access and ask it to Repair the VPN, it breaks the VPN by wiping out the static range. I have to re-add the static range as shown:
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