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  • how to defend against (D)DOS

    Hi everyone, this is not a technical issue but a desparate call for advise. Our Sophos UTM-firewall (firmware version: 9.816-2) is suffering from a (D)DOS-attack that is going on for several days now. Since our internet-connection only comprises of…

  • Glossary of Technical Terms

    Hey Sophos Community, Ever wondered what a Fraggle Attack is? What's a DDoS? Or what exactly a Man-In-The-Middle attack is? Look no further! Visit our Glossary of Technical Terms KB article for the definitions of terms commonly used within Sophos and…

  • I am being DDOS'd via SMTP. Help!

    Hi there, I am being DDOS'd via SMTP. These strange "queues" (or whatever you'd call the requests) come from china/turkey keep coming and will not stop. I have no idea how to block them. As you can see, in the log there sometimes isn't even an IP…

  • Enabling Anti-DoS/Flooding slows download speed by over 300 Mbps. Does that seem right?

    The network in question was getting DDoS attacks almost daily so IPS was enabled and configured which stopped the attacks. In the Anti-DoS/Flooding tab TCP SYN Flood Protection, UDP Flood Protection, and ICMP Flood Protection have all been applied. Since…
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