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I have just installed pptpd on a debian server, configured the ip to and started the service. The service appears to be running on eth0:, which is as expected.

However I thought that pptpd would create a new network interface, so that I could tell my ftp server to listen on, but ifconfig only returns the eth0 and lo interfaces. Have I misunderstood how this thing works? How should I configure services/daemons so that they are only available to the VPN clients?

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