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Barracuda NextGen Firewall X

Connectivity problems as soon as Barracuda NG Access Client is installed

  • Type: Knowledgebase
  • Date changed: 5 months ago
Solution #00005318 

This solution replies to:
- NG Network Access Client versions 2.0-SPx
- Entegra Client versions 1.0-SPx, 2.0-SPx

This behavior occurs, if checksum offloading is enabled on the network adapter and the firewall is enabled.

Especially UDP-packets (but also in example ICMP probing packages of the Health Agent itself) fail, because checksum is not calculated correctly on the network adapter.

Disable the "Task Offload" / "Checksum Offload" via registry.

1. Open registry editor: Start > Run > regedit.exe

2. Open HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters

3. Create the DWORD entrie "DisableTaskOffload" with value "1"

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