Kerio Tech 6 ユーザーズマニュアル

Chapter 6

Internet Connection

The basic function of WinRoute is connection of the local network to the Internet via one or

more Internet connections (Internet links). Depending on number and types of Internet links,

WinRoute provides various options of Internet connection:

A Single Internet Link — Persistent

The most common connection of local networks to the Internet. In this case, only one

Internet connection is available and it is used persistently (typically Ethernet, WiFi, ADSL

or cable modems). It is also possible to use dial-like links which can be connected persis-

tently, such as PPPoE connections or CDMA modems.

A Single Internet Link — Dial On Demand

This type of connection is fit for links which are charged by connection time — typically

modems for analog or ISDN links. The link is down by default and WinRoute dials it in

response to a query demanding access from the local network to the Internet. If no data

are transferred via the link for some time, WinRoute hangs it up to reduce connection

costs.

Multiple Internet Links — Failover

Where reliability (availability of the Internet connection) is an issue and two Internet links

are available, the connection failover feature can help. If the primary link fails, WinRoute

switches to the secondary link automatically. Users may therefore notice just a very

short disconnection of the Internet connection. When the connection on the primary link

is recovered, WinRoute automatically switches back to it. For most part of users, this

operation takes so short to be even noticeable.

Multiple Internet Links Traffic Load Balancing

If throughput (connection speed) is an issue, WinRoute can use multiple links concur-

rently and spread data transferred between the LAN and the Internet among these links.

In standard conditions and settings, this also works as connection failover — if any of

the links fails, transferred data are spread among the other (working) links.

In all cases, WinRoute works in the mode of shared Internet connection. Sharing uses the

(IP address translation) technology, hiding the entire local network behind a public IP address

of the firewall (or multiple addresses — depending on the type of Internet connection applied).

WinRoute can also be used as a neutral

(router without NAT). However, this mode is not

the best connection of the LAN to the Internet — it requires expert configuration and advanced

security.