A couple of packet captures might help you (and us) see what is being sent
differently.

On Wed, 3 Apr 2019 at 20:32, Conrad Kostecki <ck+dnsm...@bl4ckb0x.de> wrote:

> Hi,
> in order to make PXE possible with older notebooks, I've compiled for
> myself Netboot.
> This is a piece of software, which starts from floppy, where you can load
> your dos paket driver and start PXE.
> Basically, it makes possible to boot with PXE by using PCMCIA networks
> cards from floppy, when nothing else is possible to boot from.
>
> Netboot itself is working so far fine, it initializes itself fine, loads
> my dos packet driver and starts DHCP.
> I can clearly see, that a DHCP broadcast comes into my DNSMasq, which
> replies with a DHCP offer.
> And here it stops. It seems, Netboot can't correctly handle that offer by
> DNSMasq, as it silently drops it and tries again.
> So I see multiple broadcast searches and DHCP offers.
>
> BUT: If I use DHCP from an ordinary AVM Fritz!Box 7490 (Router), Netboot
> succeeds and can handle the reply from it.
> So the question is, what could go wrong? Can I debug this somehow? Any
> solutions to make this possible work with Netboot?
>
> Note: Netboot is pretty old, latest release is from 2007. I suspect, that
> maybe DNSMasq does some RFC correct, which is "too new" for those old
> clients.
> Any help would be appreciated.
>
> Conrad
> _______________________________________________
> Dnsmasq-discuss mailing list
> Dnsmasq-discuss@lists.thekelleys.org.uk
> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
>


-- 

*John Robson Sr. Customer Support Engineer**, Zenoss
<https://www.zenoss.com/>*
jrob...@zenoss.com | *O:*

<https://www.zenoss.com/resources/gartner-market-guide-it-infrastructure-monitoring-tools>
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