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SA Lifetime
: Phase negotiation time.
Other Parameters:
DPD Delay / DPD timeout
: After tunnel is built, in order to check tunnel state, router
will send LCP packet in every tunnel check interval. When the number of
tunnel-checking failures over the value of “DPD timeout”, router will initiate to
terminate the connection and send a request to rebuild the tunnel.
IPcomp
: IP payload compression.
4.3.3.2 L2TP
L2TP (Layer 2 Tunneling Protocol) is a kind of VPDN technology, it’s specifically used
in transferring data in layer 2 tunnel. Also means it’ll encapsulate data units of layer 2(such
as PPP data) within an IP or UDP payload.
Server
: IP address or domain of PPTP server.
Remote Subnet / Remote Mask
: Intranet information on server side.
User / Password
: LAC username and password.
Protocol
: The way of PPTP to perform PPP authentication --
Pap: in this way, username and password are transmitted in clear text, the security
level of it is low.
Chap
MS-Chap
MS-Chap-V2
Any: it will take one of four approaches to verify.
MPPE
: Way to encrypt --
NoMppe: No encryption.
