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[Archive] How do I block multicast traffic in Transparent Mode?

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Article ID: KB7193 KB Last Updated: 12 Aug 2010Version: 4.0
Summary:

I've blocked traffic using "bypass-non-ip-all arp". I still see mullticast traffic

How do I block multicast traffic in Transparent Mode?

Symptoms:
Environment:
  • bypass-non-ip-all
  • arp
  • cdp
  • transparent mode
  • is-is
  • appletalk
  • ipx
  • unicast
  • broadcast
  • multicast
Solution:

In Transparent mode, by default the device blocks all non-ip and non-ARP unicast traffic.


Beginning with ScreenOS 4.0.1r9 and later releases, users can also block multicast and broadcast traffic using a new CLI command

unset interface bypass-non-ip-all

This command will block all layer 2 non-ip and non-ARP unicast, multicast and broadcast traffic.

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