Tut Systems SMS2000 manual Understanding 1to1 and 1to1 Unique IP Types, Configuring IP Types

IP Addressing

Configuring a Control Network for

Additional Client IP Addresses

Note: This command is only required when using DHCP or static IP addresses on a physical network with multiple IP subnets, and the administrator wants subscribers to be allocated DHCP or static addresses from these additional IP subnets.

To configure a control network for additional client IP addresses, use this command:

control-net[delete] {ip_address netmask ip_mask ip_address/masklen

start-address end-address ip_mask}

For example, to set a control-net network, type:

sms2000% control-net 192.168.20.100 192.168.20.100 255.255.255.255

For example, to delete a control-net network, type:

sms2000% control-net delete 192.168.20.100 192.168.20.100 255.255.255.255

Understanding 1to1 and 1to1 Unique IP Types

Note: Ip types 1to1 and 1to1 unique are helpful in responding to Digital Millennium Copyright Act (DMCA) complaints regarding subscribers sharing copyrighted material illegally because they allow you to quickly isolate the specific subscriber illegally sharing the copyrighted material. However, because complaints may be filed well after a subscriber has disconnected, accounting records indicating which subscriber used which IP address at which time must be kept using either Syslog accounting, RADIUS accounting, or both.

When you configure group members for 1to1, unique addresses are assigned for each session from a pool of source-net addresses. These addresses are used to determine which session incoming packets (from the WAN) belong. The source port number of a 1to1 session is sent without port mapping to the destination.

Every subscriber uses a unique source-net address. When all of the addresses in a source- net pool are in use and additional subscribers try to connect:

•1to1 reverts to normal NAT (port mapped).

•1to1 unique does not allow a new session.

Configuring IP Types

To configure the IP type for members of the active/current group, use the following command:

iptype {default NAT static DHCP 1to1 1to1Unique}

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