Re: dhcp address in /etc/hosts
Kenneth R Westerback rogers.com> writes: > > I don't really get a vote as i'm not a developer, however cookies to anyone > > who fixes this the correct way. > > > > -- > > > > Sam Fourman Jr. > > > > Define 'correct way'. Personally, I have found running BIND and placing 127.0.0.1 to /etc/resolv.conf as most easier way to minimize /etc/hosts usage. I always thought of very minimalistic (read "secure") DNS server built-in into dhclient as a privsep process, so dhclient can dynamically push settings (based on a lease from DHCP server) via IMSG, so placing 127.0.0.1 to /etc/resolv.conf will "just work". I understand above approach maybe mixing things in non-unix way, but DHCP is designed so: it touches interface address, default gateway and resolver settings.
Re: dhcp address in /etc/hosts
On 07/21/13 09:24, Alexander Hall wrote: Since we by default allow dhclient to rewrite (and thus a dhcp server to dictate) our hostname, I'm wondering if a 'lookup hostname file bind' in resolv.conf could be useful... But I expect being flamed for it. :-) Thinking of it, what address would it use? egress:0? I dunno. /Alexander
Re: dhcp address in /etc/hosts
On 07/21/13 09:02, Jan Stary wrote: On Jul 20 18:34:50, dera...@cvs.openbsd.org wrote: On Jul 20 22:14:52, h...@stare.cz wrote: I believe I have bitched about this before, but I have come to it again with new install. If I use [dhcp] to configure an interface during an install, the ephemeral DHCP-assigned address gets written into /etc/hosts. That address is meaningless after the reboot, possibly even conflicting when I later decide on a fixed IP for the machine. Should it be removed from /etc/hosts after the install, when we have DNS set up and all? Should it at least be mentioned in afterboot(8)? --- afterboot.8.origSat Jul 20 22:24:03 2013 +++ afterboot.8 Sat Jul 20 22:28:51 2013 @@ -153,6 +153,13 @@ if it needs to be changed. You will also need to edit the .Pa /etc/myname file to have it stick around for the next reboot. +.Pp +Note that the hostname chosen during installation is saved in +.Pa /etc/hosts +with whatever address was used then. +If you later decide on another address for the machine, +remember to remove the conflicting one from +.Pa /etc/hosts . .Ss Verify network interface configuration The first thing to do is an .Ic ifconfig -a I don't like this diff. But perhaps because I totally hate that the installer is placing that name there. I believe that dynamically learned names should not be saved in that fashion. I don't like it either; what is the reason we are saving it there? I vaguely remember sendmail bitching about not being able to resolve its own hostname - is it that? Since we by default allow dhclient to rewrite (and thus a dhcp server to dictate) our hostname, I'm wondering if a 'lookup hostname file bind' in resolv.conf could be useful... But I expect being flamed for it. :-) /Alexander
Re: dhcp address in /etc/hosts
On Jul 20 18:34:50, dera...@cvs.openbsd.org wrote: > > On Jul 20 22:14:52, h...@stare.cz wrote: > > > I believe I have bitched about this before, > > > but I have come to it again with new install. > > > > > > If I use [dhcp] to configure an interface during an install, > > > the ephemeral DHCP-assigned address gets written into /etc/hosts. > > > > > > That address is meaningless after the reboot, possibly even > > > conflicting when I later decide on a fixed IP for the machine. > > > > > > Should it be removed from /etc/hosts after the install, > > > when we have DNS set up and all? Should it at least > > > be mentioned in afterboot(8)? > > > > > > --- afterboot.8.origSat Jul 20 22:24:03 2013 > > +++ afterboot.8 Sat Jul 20 22:28:51 2013 > > @@ -153,6 +153,13 @@ if it needs to be changed. > > You will also need to edit the > > .Pa /etc/myname > > file to have it stick around for the next reboot. > > +.Pp > > +Note that the hostname chosen during installation is saved in > > +.Pa /etc/hosts > > +with whatever address was used then. > > +If you later decide on another address for the machine, > > +remember to remove the conflicting one from > > +.Pa /etc/hosts . > > .Ss Verify network interface configuration > > The first thing to do is an > > .Ic ifconfig -a > > > > I don't like this diff. > > But perhaps because I totally hate that the installer is placing that > name there. I believe that dynamically learned names should not be > saved in that fashion. I don't like it either; what is the reason we are saving it there? I vaguely remember sendmail bitching about not being able to resolve its own hostname - is it that?
Re: dhcp address in /etc/hosts
On Sat, Jul 20, 2013 at 08:42:21PM -0400, Sam Fourman Jr. wrote: > I don't like this diff. > > > > > But perhaps because I totally hate that the installer is placing that > > name there. I believe that dynamically learned names should not be > > saved in that fashion. > > > > > > I don't really get a vote as i'm not a developer, however cookies to anyone > who fixes this the correct way. > > -- > > Sam Fourman Jr. > Define 'correct way'. :-) Ken
Re: dhcp address in /etc/hosts
I don't like this diff. > > But perhaps because I totally hate that the installer is placing that > name there. I believe that dynamically learned names should not be > saved in that fashion. > > I don't really get a vote as i'm not a developer, however cookies to anyone who fixes this the correct way. -- Sam Fourman Jr.
Re: dhcp address in /etc/hosts
> On Jul 20 22:14:52, h...@stare.cz wrote: > > I believe I have bitched about this before, > > but I have come to it again with new install. > > > > If I use [dhcp] to configure an interface during an install, > > the ephemeral DHCP-assigned address gets written into /etc/hosts. > > > > That address is meaningless after the reboot, possibly even > > conflicting when I later decide on a fixed IP for the machine. > > > > Should it be removed from /etc/hosts after the install, > > when we have DNS set up and all? Should it at least > > be mentioned in afterboot(8)? > > > --- afterboot.8.orig Sat Jul 20 22:24:03 2013 > +++ afterboot.8 Sat Jul 20 22:28:51 2013 > @@ -153,6 +153,13 @@ if it needs to be changed. > You will also need to edit the > .Pa /etc/myname > file to have it stick around for the next reboot. > +.Pp > +Note that the hostname chosen during installation is saved in > +.Pa /etc/hosts > +with whatever address was used then. > +If you later decide on another address for the machine, > +remember to remove the conflicting one from > +.Pa /etc/hosts . > .Ss Verify network interface configuration > The first thing to do is an > .Ic ifconfig -a > I don't like this diff. But perhaps because I totally hate that the installer is placing that name there. I believe that dynamically learned names should not be saved in that fashion.
Re: dhcp address in /etc/hosts
On Jul 20 22:14:52, h...@stare.cz wrote: > I believe I have bitched about this before, > but I have come to it again with new install. > > If I use [dhcp] to configure an interface during an install, > the ephemeral DHCP-assigned address gets written into /etc/hosts. > > That address is meaningless after the reboot, possibly even > conflicting when I later decide on a fixed IP for the machine. > > Should it be removed from /etc/hosts after the install, > when we have DNS set up and all? Should it at least > be mentioned in afterboot(8)? --- afterboot.8.origSat Jul 20 22:24:03 2013 +++ afterboot.8 Sat Jul 20 22:28:51 2013 @@ -153,6 +153,13 @@ if it needs to be changed. You will also need to edit the .Pa /etc/myname file to have it stick around for the next reboot. +.Pp +Note that the hostname chosen during installation is saved in +.Pa /etc/hosts +with whatever address was used then. +If you later decide on another address for the machine, +remember to remove the conflicting one from +.Pa /etc/hosts . .Ss Verify network interface configuration The first thing to do is an .Ic ifconfig -a
dhcp address in /etc/hosts
I believe I have bitched about this before, but I have come to it again with new install. If I use [dhcp] to configure an interface during an install, the ephemeral DHCP-assigned address gets written into /etc/hosts. That address is meaningless after the reboot, possibly even conflicting when I later decide on a fixed IP for the machine. Should it be removed from /etc/hosts after the install, when we have DNS set up and all? Should it at least be mentioned in afterboot(8)? Jan
