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  • Locate DHCP server

    Hi all,

    I have got general problem. I have two offices connected by L2 tunnel. This tunnel is completely buildt by our ISP. I have also a lot of VLAN configured on L3 switch. L3 switch is making DHCP relay to my DC on which is DHCP installed. Some times I have problem with DHCP. Clients are getting IP for a long time. So i Tryed to use DHCPFIND.EXE utility downloaded from internet a tryied to get some results.



    Packet from 65.76.90.46
    Offered IP 192.168.2.170
    Renew Due in 7200 Seconds
    Lease Length 14400 Seconds
    Subnet Mask 255.255.252.0
    -------------------------
    Packet from 65.76.90.46
    Offered IP 192.168.2.170
    Subnet Mask 255.255.252.0
    Renew Due in 7200 Seconds
    Lease Length 14400 Seconds
    -------------------------
    Packet from 65.76.90.46 #public DHCP????
    Offered IP 192.168.2.170
    Renew Due in 7200 Seconds
    Lease Length 14400 SecondPacket from 192.168.2.1
    Offered IP 192.168.0.225
    Subnet Mask 255.255.252.0
    Renew Due in 7200 Seconds
    Lease Length 14400 Seconds
    -------------------------
    Packet from 65.76.90.46 # public DHCP????
    Offered IP 192.168.1.41
    Renew Due in 7200 Seconds
    Lease Length 14400 Seconds
    Subnet Mask 255.255.252.0
    -------------------------
    Packet from 192.168.2.1 # my DHCP server
    Offered IP 192.168.0.225
    Subnet Mask 255.255.252.0
    Renew Due in 7200 Seconds
    Lease Length 14400 Seconds
    -------------------------

    I have got firewall bootp from lan to internet. How can I got better trace?

    Caspi
    Thanks

    Caspi

  • #2
    Re: Locate DHCP server

    you need to find what that 65.xxx adders is

    you aren't using any public IP addresses in your network?



    what subnes SHOULD be offering what?
    Is it possible that DHCPFinder is a bit confused as it sees the ip-helper packet coming back from the public IP address at the other site?
    Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

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