Thank you, the dhcp-ignore did the trick. -- Nabeel Jafferali Director - Product Mgmt. Jazinga Inc. 416.548.4755 x103
On Thu, Dec 29, 2011 at 3:20 PM, Simon Kelley <[email protected]>wrote: > On 29/12/11 16:30, Nabeel Jafferali wrote: > > Hello. > > > > We've recently noticed a problem with our setup, that was based on the > > information in this (old) thread. > > > > Essentially, we used Simon's instructions (below) to configure dnsmasq to > > not reply to DHCP requests for leases, but to only respond to DHCP INFORM > > requests. We also had option 66 parameters configued for a specific MAC > > address range. This worked great in our scenario, where we had devices > > getting IP/DNS/etc. from the primary DHCP server, and subsequently > getting > > DHCP option 66 info from the dnsmasq instance replying to a DHCP INFORM > > request. > > > > However, we've noticed some Windows PCs also request DHCP INFORM, and it > > appears dnsmasq replies to those requests and provides DNS server > > information - those PCs then start to use the DNS servers supplied by > > dnsmasq instead of the DNS servers supplied by the primary DHCP server. > > > > A few questions: > > > > 1. How can I cause dnsmasq to only reply to DHCP INFORM requests from a > > certain MAC range? I already have the MAC range configured, and have > > dnsmasq configured to provide specific option 66 information to that MAC > > range only. > > dhcp-ignore = !<tag> will stop all replies except when the tag is set. > Use the same tag you set on the MAC range, and it will work fine. > > > 2. If not possible, how can I cause DNS server information to not be > > included in the reply to DHCP INFORM? > > dhcp-option = option:dns-server > > (Dnsmasq uses itself as the default DNS server, the above overrides the > default and sets no DNS server option. > > > 3. If both not possible, where do I specify the specific DNS servers > which > > dnsmasq uses in the aforementioned reply? Perhaps I can just replicate > the > > information that the primary DHCP server sends. > > > > Some variation on the example above will work for this. > > HTH > > Simon. > > > > > _______________________________________________ > Dnsmasq-discuss mailing list > [email protected] > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss >
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