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Configuring the WAN
Cisco ISA500 Series Integrated Security Appliances Administration Guide 128
4
PPTP The PPTP protocol is typically used for VPN connection. Use the necessary
information from your ISP to complete the PPTP configuration:
• IP Address: Enter the IP address of the WAN port that can be accessible
from the Internet.
• Subnet Mask: Enter the subnet mask.
• Gateway: Enter the IP address of default gateway.
• User Name: Enter the username that is required to log into the PPTP
server.
• Password: Enter the password that is 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
this box to enable the MPPE encryption to provide data security for the
PPTP connection that is between the VPN client and the 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 alive: 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.
Network Addressing
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Configuration