DHCP Client Configuration Advanced Settings Options with pfSense Rel. 2.2

  • Now that pfSense Rel 2.2 is out with the DHCP client configuration advanced settings options (Interfaces: WAN: DHCP client configuration: Advanced), here as a usage example are the DHCP client configuration advanced settings I've used for impersonating the Verizon FiOS and Frontier FiOS router's WAN DHCP client (Actiontec MI424-WR HW Rev. C & F).

    Be sure to read the notes below also for some additional details.

    Protocol Timing:
    timeout 60
    retry 1
    select-timeout 0
    initial-interval 1

    Lease Requirements and Requests:

    dhcp-class-identifier "Wireless Broadband Router", dhcp-client-identifier "", host-name "{hostname}", domain-name "home", option-125 00:00:0d:e9:1f:01:06:30:30:30:46:42:33:02:0c:{mac_addr_hexU:}:03:07:4d:49:34:32:34:57:52


    subnet-mask, broadcast-address, time-offset, routers, domain-name, domain-name-servers, time-servers, log-servers, default-ip-ttl, interface-mtu, vendor-encapsulated-options, dhcp-requested-address, dhcp-lease-time, dhcp-server-identifier, dhcp-parameter-request-list, dhcp-class-identifier, dhcp-client-identifier, www-server, option-125


    subnet-mask, domain-name-servers, routers

    In the send option host-name, {hostname} uses the string specified as the Hostname in the standard DHCP client configuration options.  In the case of both the Verizon and Frontier Actiontec MI424-WR Rev. C & F this was/is: Wireless_Broadband_Router
    If desired {hostname} can be replaced directly with the hostname string.

    In the send option option-125, {mac_addr_hexU:} uses the network interfaces MAC address in the form of XX:XX:XX:XX:XX:XX (upper case with colon delimiter).
    If desired {mac_addr_hexU:} can be replace directly with the HEX representation of the network interfaces MAC address.
    For Example: MAC 00:01:02:03:04:05:06 would be 30:30:30:31:30:32:30:33:30:34:30:35:30:36

    With the exception that option-125 was not used (omitted) for Frontier FiOS, these advanced DHCP cleint configuration options were the same for both Verizon FiOS and Frontier FiOS with Actiontec MI424-WR HW Rev. C & F.

    To verify these are the correct settings for impersonating your router's WAN DHCP client, get a packet capture of it's DHCP discover request and alter the options accordingly.

    Attached is an override config file example using these same settings.

    [Actiontec.MI424-WR FiOS Impersonation.conf.txt](/public/imported_attachments/1/Actiontec.MI424-WR FiOS Impersonation.conf.txt)

  • Logged in to say thanks - this grabs the default IP lickety split.
    When you said option-125, {mac_addr_hexU:} I simply replaced my VZ actiontek mac for all inluding braces

    Now getting the NAT rules for stb channel guide, ugh, confoosion.

  • Thank you, NOYB for this and your other guides regarding this topic on this forum.

    I have modified your above instructions in a new post to work for the G1100 FiOS Quantum Gateway. The packet impersonation is slightly different (option 61 instead of option 125).

    FIOS - Fake WAN DHCP Setup for G1100 (FiOS Quantum Router)

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