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[ScreenOS] Allow or disallow the flow of Layer 2 broadcast traffic through the firewall in Transparent mode

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Article ID: KB6756 KB Last Updated: 25 Aug 2010Version: 3.0
Summary:

Allow or disallow the flow of Layer 2 broadcast traffic through the ScreenOS firewall in transparent mode

Symptoms:

Here is the problem or goal:

  • Allow or disallow the flow of Layer 2 broadcast traffic through the NetScreen in transparent mode

Problem Environment:

  • Transparent mode
  • Broadcast traffic

Causes of this problem:

  • If at least one security policy is defined, the default is to allow non-IP broadcast traffic to pass through the firewall in Transparent mode


Solution:

The following command provides administrative control over the forwarding of non-IPv4 and non-ARP unicast, multicast, and broadcast traffic when the device is in transparent mode:

unset interface vlan1 bypass-non-ip-all

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