Networking
Configuring the WAN
Cisco ISA500 Series Integrated Security Appliance Administrator Guide
109
4
PPTP
The PPTP protocol is typically used for VPN connection. Use
the necessary information from your ISP to complete the PPTP
configurations:
•
IP Address:
Enter the IP address of the WAN port that
can be accessable from the Internet.
•
Netmask:
Enter the IP address of the subnet mask.
•
Gateway:
Enter the IP address of default gateway.
•
User Name/Password:
Enter the user name and
password that are required to log into the PPTP server.
•
PPTP Server IP Address:
Enter the IP address of the
PPTP server.
•
MPPE Encryption:
Microsoft Point-to-Point Encryption
(MPPE) encrypts data in PPP-based dial-up connections
or PPTP VPN connections. Check the box to enable the
MPPE encryption to provide data security for the PPTP
connection that is between the VPN client and VPN
server.
•
Connect Idle Time:
Choose this option to let the security
appliance disconnect from the Internet after a specified
period of inactivity (Idle Time). This choice is
recommended if your ISP fees are based on the time that
you spend online.
•
Keep Live:
Choose this option to keep the connection
always on, regardless of the level of activity. This choice
is recommended if you pay a flat fee for your Internet
service.
•
MTU:
Choose
Auto
to use the default MTU size, or
choose
Manual
if you want to specify another size.
•
MTU Value:
If you choose
Manual
, enter the custom MTU
size in bytes.
NOTE
Unless a change is required by your ISP, it is recommended
that the MTU values be left as is.
Network
Addressing
Mode
Configurations
