On Tue, Aug 31, 2010 at 02:21:56PM +0200, maximilian attems wrote: > On Fri, 27 Aug 2010, Vagrant Cascadian wrote:
> > ipconfig apparently assumes that the dhcp server's ip address is the > > nameserver when dhcp gives it no nameservers, dhcp gives the nameserver > > 0.0.0.0, or the nameservers are not ip addresses (i.e. ns1.example.org). > > while these scenarios are probably not extremely common, i'm not sure > > this is a good default with no way to disable it. > > hmm, several questions at mind, what do you mean my "dhcp gives the > nameserver" is this the ISC dhcp 3 client? in this case, i tested with isc-dhcp-server, with the domain-name-servers option: option domain-name-servers ns1.example.org, ns2.example.org; or option domain-name-servers 0.0.0.0; or having no domain-name-servers specified. though i suspect any DHCP server configured with one of the above mentioned cases would trigger the issue in ipconfig. i know the udhcpc client doesn't respond in the same way, haven't yet tested isc-dhcp-client. > is that really a sensible thing to do? > what do standards say (aka RFC's pointers)? i don't know off the top of my head... i'll look into it a bit more. > we could set it to the public available google server, > as this one might be better working as this guess of > the el cheapy router box? without reading RFC's, it doesn't necessarily seem invalid to me to have no nameservers on a network, and supplying a guessed default may cause problems. > > it prints out the message: > > > > IP-Config: eth0 guessed nameserver address 192.168.0.1 > > according to git history this was added on day 0 of ipconfig, > not that this would justify it. i didn't notice the issue till recently, when we configured ltsp to actually use the nameserver configuration that ipconfig recieves from the DHCP reply (Debian Bug #593770), and decided to play around with some unusual corner-cases... thanks for working on ipconfig! live well, vagrant -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
