What should I do in this case of Broadcast on my WAN Switch??

aq_mishu · 06-10-2011, 03:30 AM

Guys.... this is my network topology...

ISP-----WAN_Switch----Router(Vyatta)----LAN_Switch---Hostes/servers

Now it was previously and recently I added a linksys SLM224G with VLAN2=WAN Switch and VLAN3=LAN Switch. Thus eliminated the switches as they get hang after a while. After doing a packet capture for only 5 mins (not even promiscuous mode) on the WAN VLan, I found the capture file attached. Now my question is why I'm seeing all these broadcasts and though I have blocked those IP blocks on my firewall to reject, but what possible problems can they cause (my switch is all time busy because of them). I need suggestion plz...

Mishu~

frankbell · 06-10-2011, 08:34 PM

They are likely random port scans. There is no way to keep people from knocking on the door; all you can do is refuse to let them in.

http://netsecurity.about.com/cs/hack...a/aa121303.htm