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IP address.
MTU
：
the max data packets which can go through tunnel.
4.3.2 PPTP
PPTP is a protocol in layer 2, it transfers data by encapsulating PPP data frames within
IP packets. It also can be used in the connection of private LAN. It uses a TCP connection
to maintain the tunnel, and uses GRE technology to encapsulate the data to PPP data frames
then transfer the data through tunnel. And also, it can encrypt or compress the data
encapsulated in PPP frames.
Server
: IP address or domain of PPTP server.
Remote Subnet / Remote Mask
: Intranet information on server side.
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.
Mppe-(40|128)
Mppe-StateFul
Add Default Route
: If it’s checked, then all the data passing through the router
will be sent to PPTP tunnel. Also means, all the devices connected to the router are
only allowed to access external network through PPTP tunnel.
NAT
: If it’s checked, the devices connected to the router can access PPTP server
through the tunnel. If not, then these devices only can access server via Internet.
Specify Local IP / Specify Peer IP
: If PPTP server allows it, router can specify a
local tunnel IP address.
Tunnel Check Interval / Tunnel Check Times
: After tunnel is built, in order to
