Dear Internet community member, hi and welcome to:

DNi v0.6
by robel@usa.net

Learn how DNi works    Download the source and run it localy

Representing an IP firewall administration programs location :

Representing external interface :    Representing loopback interface :

An IP packet filter can react in different ways to packet.

Actions are:
Accept: let the packet pass the filter.
Deny:   silenty drop the packet.
Reject: drop the packet and send an ICMP Destination Unreachable message back to the sender as a notification.

Restrict incoming connections on only those reserved contact port names representing services you are providing to the outside world.

Legend: each color indicates TCP, UDP or both TCP and UDP application services.

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