Constant DHCPPACK & DHCPINFORM from 1 device



  • I'm getting one device constantly issuing DHCPACK & DHCPINFORM (see below), I've seen some comments which have suggested issuing a 252 with a \n might work.

    In Services: DHCP server, theres an option in Additional BOOTP/DHCP Options to add additional parameters.
    If I wanted to add 252 would I use a Text or a String?

    TIA

    Jan 13 16:55:01 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:55:01 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:54:01 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:54:01 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:53:01 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:53:01 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:52:00 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:52:00 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:51:00 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:51:00 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:50:00 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:50:00 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:49:00 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:49:00 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:48:00 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:48:00 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:47:00 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:47:00 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:46:00 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:46:00 dhcpd: DHCPINFORM from 192.168.10.3 via em0
    Jan 13 16:44:59 dhcpd: DHCPACK to 192.168.10.3 (11:11:11:11:11:11) via em0
    Jan 13 16:44:59 dhcpd: DHCPINFORM from 192.168.10.3 via em0


  • Netgate Administrator

    Is that the actual MAC that you're using? What is 192.168.10.3?

    https://doc.pfsense.org/index.php/DHCP_Server#Numbered_Options_Notes

    You want to send a null config url via option 252? Do you have a link to this suggestion?

    Edit: Ah, OK. Like this: http://wiki.openwrt.org/doc/howto/dhcp.dnsmasq#log_continuously_filled_with_dhcpinformdhcpack

    Edit: It expects a string:
    @http://tools.ietf.org/html/draft-ietf-wrec-wpad-01:

    The DHCP option code for WPAD is 252 by agreement of the DHC working
      group chair.  This option is of type STRING.  This string contains a
      URL which points to an appropriate config file.  The STRING is of
      arbitrary size.

    Steve



  • Not the actual mac, but its a TalkTalk tv box, not even windows, but I thought I'd give the windows suggestion ago before calling TalkTalk support to see what they suggest.

    I had looked on the actual draft web page earlier but couldnt see anything but wanted to double check anyway as a null for me is a 0 as in long pointers normally.


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