I have a weird problem on my home network at present where I lose my DSL connection at frequent intervals. I checked the logs on the router and it appears that there's a SYN FLOOD going on originating from my laptop. Here's the setup. I have a wireless router downstairs connected to my DSL line. It's also connected directly to my main PC upstairs via a long cat5 cable. Upstairs is a wireless access point. Generally my MacBook Air is connected wirelessly as well as a small selection of other things such as my phone, my Kindle, visitor's computers etc. Here's a chunk of logs: The address 192.168.2.100 is the LAN address that is assigned to my laptop. I set up static DHCP rules for most of my stuff to avoid problems. So since yesterday I keep getting kicked off anything that requires a consistent connection - online games, chat clients, etc. Whenever I do the log shows a whole bunch of SYN Flood results like those, always originating from my laptop. I'm not really techy enough to figure out what to do about that, I did some Googling and it appears that it can be a false alarm or it might not be. The laptop is running OSX 10.8.2 and the only thing I can think of that changed recently was that a visitor connected an iPhone and iPad into the network. Neither of those last things are assigned static network addresses.