Re: [Dnsmasq-discuss] Can Dnsmasq be told not to advertise a specific prefix via RA?
Thanks for the suggestion. That does work, although it's a bit messy to have to advertise a prefix you don't want the clients to use. Cheers, Christopher Martin On Sun, Oct 28, 2018 at 7:41 AM Simon Kelley wrote: > > Can you also add a dhcp-range for the ULA range, which deprecates it? > > Cheers, > > Simon. > > > On 27/10/2018 18:17, Christopher Martin wrote: > > Greetings, > > > > Is it possible to prevent Dnsmasq from advertising a specific prefix via > > router advertisements? > > > > Here's my situation. My ISP provides a dynamic IPv6 prefix which, using > > wide-dhcpv6, ends up assigned to interface bond0. Dnsmasq then > > advertises the prefix on bond0 out to the LAN. The various hosts on the > > LAN use it, together with IPv6 privacy extensions, to generate global > > IPv6 addresses. So far so good. > > > > For reference, my config is as follows: > > > > dhcp-range=::,constructor:bond0,ra-only,infinite > > > > Here's the problem. I also assign a ULA to bond0 (fd00:etc.). Dnsmasq > > also advertises this prefix to the LAN, but I don't want it to, because > > then the other hosts on the LAN end up generating addresses based on it, > > including via IPv6 privacy extensions. Whereas what I want is to > > manually assign each host its own specific, unchanging and easily > > remembered ULA, which should also be the source IP used when connecting > > to various services around the LAN. Too many ULAs cause problems. > > > > Is there a way to instruct Dnsmasq to _not_ advertise the ULA prefix, > > but to continue advertising the global prefix from my ISP? Perhaps this > > option already exists and I've simply missed it - apologies if that's > > the case. > > > > Thanks very much, > > > > Christopher Martin > > > > ___ > > Dnsmasq-discuss mailing list > > Dnsmasq-discuss@lists.thekelleys.org.uk > > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss > > > > ___ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Can Dnsmasq be told not to advertise a specific prefix via RA?
Can you also add a dhcp-range for the ULA range, which deprecates it? Cheers, Simon. On 27/10/2018 18:17, Christopher Martin wrote: > Greetings, > > Is it possible to prevent Dnsmasq from advertising a specific prefix via > router advertisements? > > Here's my situation. My ISP provides a dynamic IPv6 prefix which, using > wide-dhcpv6, ends up assigned to interface bond0. Dnsmasq then > advertises the prefix on bond0 out to the LAN. The various hosts on the > LAN use it, together with IPv6 privacy extensions, to generate global > IPv6 addresses. So far so good. > > For reference, my config is as follows: > > dhcp-range=::,constructor:bond0,ra-only,infinite > > Here's the problem. I also assign a ULA to bond0 (fd00:etc.). Dnsmasq > also advertises this prefix to the LAN, but I don't want it to, because > then the other hosts on the LAN end up generating addresses based on it, > including via IPv6 privacy extensions. Whereas what I want is to > manually assign each host its own specific, unchanging and easily > remembered ULA, which should also be the source IP used when connecting > to various services around the LAN. Too many ULAs cause problems. > > Is there a way to instruct Dnsmasq to _not_ advertise the ULA prefix, > but to continue advertising the global prefix from my ISP? Perhaps this > option already exists and I've simply missed it - apologies if that's > the case. > > Thanks very much, > > Christopher Martin > > ___ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss > ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] Can Dnsmasq be told not to advertise a specific prefix via RA?
Greetings, Is it possible to prevent Dnsmasq from advertising a specific prefix via router advertisements? Here's my situation. My ISP provides a dynamic IPv6 prefix which, using wide-dhcpv6, ends up assigned to interface bond0. Dnsmasq then advertises the prefix on bond0 out to the LAN. The various hosts on the LAN use it, together with IPv6 privacy extensions, to generate global IPv6 addresses. So far so good. For reference, my config is as follows: dhcp-range=::,constructor:bond0,ra-only,infinite Here's the problem. I also assign a ULA to bond0 (fd00:etc.). Dnsmasq also advertises this prefix to the LAN, but I don't want it to, because then the other hosts on the LAN end up generating addresses based on it, including via IPv6 privacy extensions. Whereas what I want is to manually assign each host its own specific, unchanging and easily remembered ULA, which should also be the source IP used when connecting to various services around the LAN. Too many ULAs cause problems. Is there a way to instruct Dnsmasq to _not_ advertise the ULA prefix, but to continue advertising the global prefix from my ISP? Perhaps this option already exists and I've simply missed it - apologies if that's the case. Thanks very much, Christopher Martin ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
