The proxied stealth configuration consists of a Screen that has two stealth interfaces, two routing interfaces, and a router that passes packets from a stealth interface to a routing interface. Use this type of configuration if you want to use proxy services with a stealth machine.
This configuration is subject to the following restrictions:
NAT can be performed only in the networks connected to the stealth interfaces.
FTP and Telnet between the stealth and routing networks work only if you use proxies for this type of communication.