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Barracuda Web Security Gateway

I put in an IP Block and now I can't access my Web Filter - what do I do?

  • Type: Knowledgebase
  • Date changed: 10 months ago
Solution #00007082 

All Barracuda Web Filters, All Firmware Versions

Chances are you accidentally locked out an entire subnet when you tried to block just one machine, and you may have blocked either the subnet with your workstation in it, or the subnet with the Web Filter in it.
1. Gain Access to the Web Filter
If you think you blocked the subnet with your workstation in it, accessing the Web Filter is simple: Open the Web UI from a workstation in the same subnet as the Web Filter, or some other unblocked subnet.
If you think you blocked the subnet of the Web Filter, it gets a little more complicated. Connect a monitor and keyboard to the Web Filter and go to the IP Configuration page. Change the IP, subnet and default gateway of the Web Filter itself to another subnet. This will break connectivity to the internet, if you still had it.
Next, unplug the LAN cable and connect a laptop to the Web Filter. Change the IP of the laptop to an IP in the same subnet as the Web Filter. For Subnet Mask and Default Gateway, match the configuration of the Web Filter.
In some cases, it may aid connectivity to set the Default Gateway of the Web Filter to the IP of the laptop, and the Default Gateway of the laptop to the IP of the Web Filter.
2. Correct the IP Block
Log into the Web Filter Web UI and go to the Block/Accept > IP Block/Exempt Page. A common mistake is to put in an IP Block for a single IP, but give a subnet mask of the entire subnet. This will block the entire subnet. To fix this, change the subnet mask of the block to (for more information on IP Exemptions and Blocks, see solution 4277). Make sure to Save Changes. This should fix the problem.
If you had to pull the Web Filter from your network, make sure to change the IP, Subnet and Default Gateway of the Web Filter back to the original settings and put it back in your network.
If this does not resolve your issue, please contact Barracuda Networks Technical Support.

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