Wireshark
Is it possible to use Wireshark to find out a DHCP server in a VLAN ?
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Yes, of course. You just need to filter for all BOOTP/DHCP stuff, and then send a DHCP request (or wait for any to be send).
But DHCP servers do not advertise themselves without a request. Info needs to get "pulled".
But DHCP servers do not advertise themselves without a request. Info needs to get "pulled".
Sure, I will plug a computer into this VLAN and monitor it through wireshark.
I'm not familiar with wireshark. Can you assist me with screen dump how to setup it up ?
Tks
I'm not familiar with wireshark. Can you assist me with screen dump how to setup it up ?
Tks
After starting WireShark, press "Capture Options", check that the correct NIC is selected, and set this as Capture Filter:
port 67 or port 68
Also "Use promiscuous mode" should be set.
That should be all.
port 67 or port 68
Also "Use promiscuous mode" should be set.
That should be all.
You might find this blog and video useful - http://www.lovemytool.com/blog/2015/10/introduction-to-packet-analysis-dhcp-by-paul-offord.html
It covers exactly what you are looking for.
Best regards...Paul
It covers exactly what you are looking for.
Best regards...Paul
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