When configuring a DSL connection
username, password, pvc
When I check on the internet I see for example encapsulation aal5mux ppp dialer.
Do you need to receive this information also? Or is this trial and error?
What's the difference with encapsulation ppp under the logical interface dialer.
I can't find good docs about the different encapsulation types.
If you setup for example a GRE tunnel then you don't have to add ip nat outside?
you should ask also the encapsulation type to the provider.
possible options are:
aal5snap for classic ip over ATM (rare in consumer services)
aal5mux with PPP over ATM
aal5snap with PPP over Ethernet over ATM
Configuring forms of VPNs over the internet can be done in different ways and yes usually you don't nat over the L3 interface to the vpn.
To be noted that GRE alone does not provide encryption.
Hope to help