When I got in from work I saw the LED for the W/LAN flicker a few times on the ADSL router.

Normally it only flashes when there is activity.

What does this mean?

2006.02.10 17:22:29 **Smurf** 213.190.51.0, 18808->> 80.189.253.196, 1026 (from ATM1 Inbound)

I have MAC address filtering in place to allow only the 2 PC's to use it.

http://www.pentics.net/denial-of-service/white-papers/smurf.cgi

this might explain a bit

And in english?

Sorry but that page means nothing to me.

It's a form of Denial of Service attack - the attacker basically tries to flood your network so your own traffic can't get through.

However you only seem to have one entry (unless there were thousands of others like it) so I wouldn't worry. Make sure your wireless LAN has encryption enabled.

I have a WEP key thingmy enabled as well as MAC filtering.

I have one *smurf* entry today and another from last week sometime

Is this a new character, "Hacker Smurf" ??

It seems the WEP is very important in these times. My Livebox has a WEP key about 20 characters long. :eek:

WEP is not safe enough. Breaking 104bit WEP keys takes only a few days of listening on standard traffic (and there are no longer WEP keys) and your PCs always broadcast their MACs without encrypting so a good listener might just grab a MAC he overheard and wait until you turn the PC off. WPA is more secure, and you should use it if your Access Point supports it... but still you can be flooded.

The best way of going secure is turning SSID broadcasting off and reducing the range only to the area you really need (your house) by manipulating the antenna and reducing the transmission power (possible in most not-cheapest Access Points)