Is option netbios-name-servers working?

[p0wn3rs]

Hi,
thanks then that's the reason, actually the client isn't asking for it 
because it's on linux so obviously won't ask for WINS.
I thought that the server will push them by default regardless of what 
the client asks.
Thanks.

On 10/8/21 02:37, Glenn Satchell wrote:
> Hi,
>
> The client sends a dhcp-option-request asking for a list of specific 
> options. The server only sends the options to the client if it asks 
> for them, and if it is configured.
>
> Can you find the DHCPREQUEST packet from the client in your wireshark 
> dump and see what options it asked for?
>
> What does your dhcpd.conf look like?
>
> regards,
> Glenn
>
> On 2021-10-08 03:01, p0wn3rs wrote:
>> Hi,
>>
>> I was doing some testing with dhcp-server-4.4.1, and although option
>> netbios-name-servers  is configured, is not being pushed to the
>> client.
>> This is the tcpdump that I see (verified also with wireshark) and
>> netbios-name-servers is no where to be found in the DHCP Offer.
>>
>> 17:50:38.398426 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none],
>> proto UDP (17), length 353)
>>     192.168.0.15.67 > 192.168.0.21.68: [udp sum ok] BOOTP/DHCP, Reply,
>> length 325, xid 0x88cd9dd1, secs 1, Flags [none] (0x0000)
>>       Your-IP 192.168.0.21
>>       Client-Ethernet-Address 08:00:27:80:d0:80
>>       Vendor-rfc1048 Extensions
>>         Magic Cookie 0x63825363
>>         DHCP-Message Option 53, length 1: ACK
>>         Server-ID Option 54, length 4: 192.168.0.15
>>         Lease-Time Option 51, length 4: 2920
>>         Subnet-Mask Option 1, length 4: 255.255.255.0
>>         Domain-Name-Server Option 6, length 8: 192.168.0.15,1.1.1.1
>>         Domain-Name Option 15, length 4: "test"
>>         Default-Gateway Option 3, length 4: 192.168.0.15
>>         NTP Option 42, length 8: 192.168.0.15
>>
>> Am I looking in the wrong place or is it really not working?
>>
>> thanks.
>>
>>
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