Help please! Sonicwall PRO 3060

I work for a rural school system. Recently we have had problems with our internet connections coming and going. Yesterday I noticed an Alert: SYN flood Attack error message. This alert is only present when we are having problems. We are running our sonicwall in stealth mode and already have the SYN flood protection enabled. Any help would be greatly appreciated.

Thank you for any help you may be able to give.

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Contact your ISP about the problem. There is very little you can do at your end. If a flood attack is coming in the line is flooded regardless what protection you may have enabled on your firewall.


Reply to
Gerald Vogt

TCP is a 3-way handshake. SYN packet it the first part of that handshake. If you are in stealth mode then you SonicWall should drop the unrequested packets. What port are the SYN packets coming in on?

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