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Some IP's do not appear on DHCP

post #1 of 19
Thread Starter 
Hello OCN'ers i have a problem that consists of IP addresses that do appear on DHCP but they (for the most part) still work, does anyone here know of a decent program that i can use to sniff all of the ip addresses on my network?
i would need the program to possibly tell me the name of the device and the Mac addresses.
Tried a few today, namely:

Free IP scanner 1.6
Advanced LAN scanner
Network scanner by lizard systems

Many Thanks,

~Fibre

PS. Sorry if this is in the wrong place!
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post #2 of 19
hmm the only reason that they wont be appearing on the DCHP list is if its got a static one. thats what happens with me and my D-Link
post #3 of 19
post #4 of 19
Are they outside the scope of the DHCP server?
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post #5 of 19
Thread Starter 
Quote:
Originally Posted by retrogamer999 View Post
hmm the only reason that they wont be appearing on the DCHP list is if its got a static one. thats what happens with me and my D-Link
The only thing with that is that my 4 servers have static IP addresses and they still appear.

Quote:
Originally Posted by Mmansueto View Post
Are they outside the scope of the DHCP server?
They are within the scope of DHCP as they all had static ip address as they are all WAP's.

Many thanks for the swift responses,

~Fibre
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post #6 of 19
I believe it's called wireshark, might have it mixed up with something else.
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post #7 of 19
ping x.x.x.x -a will resolve hostname.
nbtstat will get you your mac addresses.

Quote:
Originally Posted by Bloodfire View Post
I believe it's called wireshark, might have it mixed up with something else.
Wireshark is a packet sniffer.

Also, if you ping an address, then follow it by arp -a it will display the arp tables and you can get the mac address that way as well.
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post #8 of 19
Thread Starter 
Quote:
Originally Posted by Bloodfire View Post
I believe it's called wireshark, might have it mixed up with something else.
I'll give it a try thanks!

ps, +reps given where appropriate.
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post #9 of 19
Quote:
Originally Posted by fibre_optics View Post
The only thing with that is that my 4 servers have static IP addresses and they still appear.



They are within the scope of DHCP as they all had static ip address as they are all WAP's.

Many thanks for the swift responses,

~Fibre
If you have static addresses, they need to be outside of the DHCP scope. What subnet mask are you using and what is the DHCP range? Standard for most home routers is subnet mask of 255.255.255.0 and the dhcp range of 50 users starting at .100

If you put all of your static services below .100 then you won't have any conflicts, and all of your services will still communicate without issue.
Edited by herkalurk - 3/31/11 at 7:37am
post #10 of 19
Download Nmap, and use the free online book for help.

After which, look up windows arp table in the command line with "arp -a" for the mac-address/ip mappings.
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