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is there a default IP Address 10.0.255.255 2

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llambert2

MIS
Apr 10, 2003
80
US
I am looking at a "sniffer" on our internal network (not connected to the outside in any way. I am seeing a tremendous amount of traffic going to 10.0.255.255 in UDP form. THis is not in our used scope. And nothing is coming from it... only to it. Can anyone tell me is this some sort of default address used by Microsoft or "someone else" built into software or something. It looks like 25% of our traffic is going there. But like I said nothing is coming from it. Should I be concerned or is this a normal Address?
Thanks for any help If this is not the best forum to use ... please feel free to suggest another one. I'm open to any help at all.
 
Hi,

10.x.x.x is a private IP range, so unless it runs a proxy server (or is a router) to forward packets on it won't go any further.
Have you tried to see where this traffic is coming from (ie the IP's that are transmitting to this address) to see if you can work out what it is.

You might try asking in the TCP/IP forum on this site (use the search box at the top to find it) for more experts on the subject.

John
 
The traffic is coming from a combination of other users and even servers. I can see that it is a UDP and now I see too that it is either ( I see both) netbios-dgm with a packet size of 248 and netbios-ns with a packet size of 92.
 
I would guess that your subnet is 10.0.x.x and subnet 255.255.0.0. If that's the case, 10.0.255.255 would be a local broadcast across the subnet. Could be an application or any 1 of 100 things (or a combination of all of them) really. As you've identified that it's coming from various machines, it's worth seeing if they've got anything in common as a first step to tracking down the issue.
 
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