Correct setting for "Disable port scan and dos protection" in C3700

[FTinDFW]

Hi Expert,

What should be the correct setting for "Disable port scan and dos protection" from 

Advanced>WPS Wizard>Setup>WAN Setup

After I did a factor reset, The box is checked in "Disable port scan and dos protection".

I see from Log all the time that have these entries:

[DoS attack: Teardrop or derivative] from 139.12.155.0, port 0 2
[DoS attack: Ping Of Death] from 139.12.155.0, port 0 2

Should I un-check the "Disable port scan and dos protection"?
My device is Netgear C3700 Cable Modem Router with WiFi
Thanks for your help.

Frank

[DarrenM]

Yes you will want to un check the box so it is enabled.

DarrenM

[FTinDFW]

Thanks to your response. I'll try iy out and hopfully no more 
[DoS attack: Illegal Fragments] from 139.12.155.0, port 0

Have a great weekend.

BR//Frank

[FTinDFW]

No matter I check or un-check this setting. This entry still exist from time to time to differebt target address(all over the world - USA, Europe, south america, ...

[DoS attack: Ping Of Death] from 139.12.155.0, port 0 

Target IP:

72.106.126.106:0

181.235.103.18:0

65.197.193.196:0

136.227.151.143:0

108.217.98.8:0

1.252.34.44:0

Source always this 139.12.155.0, port 0.

Any comments and suggestions is appreciated.

Thanks

Frank