Xfer
Xfer allows you to connect into networks that otherwise would require "Port Forwarding" to be enabled inside your firewall. Xfer allows direct addressing of devices outside the network by extending IP addressing with "Segment / Offset" addressing. LAN devices may be addressed through their gateway and Xfer can pass through Apache and IIS when the ISAPI component is configured.
Source: www.software-dungeon.co.uk
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