Multicast & Nat Redirection settings [RESOLVED]

[Guest]

[share666]

I have a Linksys WRT610N router.  I have a PC that is wired to the router.  On the wireless side I use an ipod touch and occasionally a laptop.  I do not play games or have an xbox or anything like that set up.  I don't share files or printers.  I have a cable connection.  On the router I have Filter Internet Nat Redirection and Filter Multicast checked.  In my Comodo firewall log I receive messages that say my Windows Operating System is blocked; UDP; Source IP 192.168.1.100; Source Port 138; Destination IP 192.168.1.255; Destination Port 138.

Is what my firewall log telling me a good thing or a bad thing?  I can't figure out what the settings should be on the router for the above two options to insure a secure connection and what the impact is.

Thoughts?

[Ronny]

Hi share,

That's a windows broadcast packet 192.168.1.100 should be the ip address of your pc the .255 one is a broadcast over the "local network".

Based on your information you can safely disable this by going to the properties of your network adapter, select the TCP/IP properties, go to the WINS tab and disable Netbios over TCP/IP.

This will disable the ports 137/138/139 on your system and also eliminate these broadcasts.

[share666]

I didn't even think to look there.  Netbios over TCP/IP was disabled.  However, somehow the File and Printer Sharing option had been enabled.  I turned that off and it should resolve the issue. 
Thanks.

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