Stopping Open DNS - FireBrick 105: Difference between revisions
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'''In a factory state the |
'''In a factory state the Filters on a FireBrick 105 will not allow DNS to the FireBrick from the WAN - the default state is to block incoming traffic, but to allow outgoing traffic. |
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However, in some cases, customers disable the firewall by adding a rule that allows all traffic in. In this case, a new rule is needed to block DNS to the FireBrick. |
However, in some cases, customers disable the firewall by adding a rule that allows all traffic in. In this case, a new rule is needed to block DNS to the FireBrick. |
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==Instructions== |
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Create a Firewall filter to block port 53, from the WAN to the FireBrick, and make sure it's before any other rule that may allow this traffic in: |
Create a Firewall filter to block port 53, from the WAN to the FireBrick, and make sure it's before any other rule that may allow this traffic in: |
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Revision as of 15:05, 18 Haziran 2013
FireBrick 105:
In a factory state the Filters on a FireBrick 105 will not allow DNS to the FireBrick from the WAN - the default state is to block incoming traffic, but to allow outgoing traffic. However, in some cases, customers disable the firewall by adding a rule that allows all traffic in. In this case, a new rule is needed to block DNS to the FireBrick.
Instructions
Create a Firewall filter to block port 53, from the WAN to the FireBrick, and make sure it's before any other rule that may allow this traffic in:
Name: BlockOpenDNS Source: WAN Target: FireBrick (The name of your FireBrick) Action: Drop Target ports: 53 Protocol: UDP
