Date: Tue, 07 Jun 2016 16:56:47 +0200 From: "Ronald Klop" <ronald-lists@klop.ws> To: krad <kraduk@gmail.com>, "Slawa Olhovchenkov" <slw@zxy.spb.ru> Cc: "stable@freebsd.org" <stable@freebsd.org> Subject: Re: unbound and ntp issuse Message-ID: <op.yiozsxcpkndu52@ronaldradial.radialsg.local> In-Reply-To: <20160607104335.GN75630@zxy.spb.ru> References: <20160602122727.GB75625@zxy.spb.ru> <44lh2mi0k5.fsf@lowell-desk.lan> <20160603191523.GE75630@zxy.spb.ru> <44y46ie92p.fsf@lowell-desk.lan> <20160606135018.GL75630@zxy.spb.ru> <CALfReye2A8XBcjSg%2BB0Z7_j4HJsF9h7EAEjAW4Li2F5c=846YA@mail.gmail.com> <20160607084733.GM75630@zxy.spb.ru> <CALfReyc1GtDnfvVaso5h_sKqP19GZftL7-5SmGqBWEjmOE7XpA@mail.gmail.com> <20160607104335.GN75630@zxy.spb.ru>
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On Tue, 07 Jun 2016 12:43:35 +0200, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: > On Tue, Jun 07, 2016 at 11:35:59AM +0100, krad wrote: > >> Like i said you could configure ntpdate as well as ntpd, but give it a >> known good ip. It will only run once at boot, and ntpd will start after >> so >> that can use the nice pool names. >> >> A slightly better way maybe to give ntpdate a server hostname like >> ntp-server and populated the hosts file with one of the ips from >> pool.ntp.org. You could then have a periodic script to check and update >> the >> ip in the hosts every day, so it works over a reboot. The ip would >> obviously have to have an initial seed value, but you could work this >> out >> progmatically at system configuration time with tools like ansible. > > What purpose don't do it by standart scripts from base systems? > Enforcing DNSSEC must be prevent this strange works on all systems > lack CMOS time. If the system lacks CMOS time it is hard to fix this problem. It is not only about NTP+DNSSEC, but also about the lack of timekeeping. This timekeeping problem can be solved by using a local ntp-server. That would break the deadlock of NTP+DNSSEC. Ronald. > I am not expert in sh scripting for this automation. > >> On 7 June 2016 at 09:47, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: >> >> > On Tue, Jun 07, 2016 at 09:00:29AM +0100, krad wrote: >> > >> > > Well there is a deadlock situation there so you have to relax one >> of the >> > > conditions, for one time at least. >> > > >> > > Your best bet is to do a manual ntpdate against a fixed ip of known >> > > goodness. If you have a lot of machines you need to do this on, use >> > ansible >> > > or similar to do the heavy lifting for you. Ansible is best in my >> opinion >> > > if you dont have anything setup as its quick to get going. It does >> > require >> > > python on the target machines so you would need to install that >> first. >> > > Something like the following should get it working (as you dont >> have dns >> > on >> > > the target machine, package fetches wont work, so i would tunnel a >> squid >> > > proxy and let that handle all the internet stuff. >> > > >> > > add something like the following to your ssh_config >> > > >> > > Host * >> > > RemoteForward 31280 squid_server:3128 >> > > >> > > then run some stuff like this (after installing ansible on your >> > > desktop/bastion host) >> > > >> > > ansible -b -m raw -a '/usr/bin/env ASSUME_ALWAYS_YES=1 http_proxy= >> > > http://127.0.0.1:31280 /usr/sbin/pkg bootstrap -f' -u root -i >> > > <host_list_file> -kS --ask-su-pass >> > > >> > > ansible -b -m raw -a 'env ASSUME_ALWAYS_YES=YES http_proxy= >> > > http://127.0.0.1:31280 pkg install python' -u root -i >> <host_list_file> >> > > -kS --ask-su-pass >> > > >> > > ansible -m shell -a "ntpdate <good_ntp_server_ip>" -kS >> --ask-su-pass -i >> > > <host_list_file> >> > > >> > > from here on you should be able to start unbound and then ntpd eg >> > > >> > > ansible -m service -a "name=local_unbound state=restarted" >> > > -kS --ask-su-pass -i <host_list_file> >> > > ansible -m service -a "name=ntpd state=restarted" -kS >> --ask-su-pass -i >> > > <host_list_file >> > > >> > > Alternatively you could just relax your dnssec rules on first boot >> to >> > give >> > > ntp a chance. Probably much easier 8) >> > >> > How I am do it? I am don't touch dnssec rules and don't know unbound. >> > May be this is posible by startup scripts? >> > Also, some platforms lack of CMOS time, RPi, for example. >> > >> > > Also make sure you are using the '-g' flag on ntpd >> > >> > Yes, I am add `ntpd_sync_on_start=yes` to rc.conf. >> > I am suggest do it by checkbox in bsdinstall. >> > >> > >> > > On 6 June 2016 at 14:50, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: >> > > >> > > > On Mon, Jun 06, 2016 at 09:33:02AM -0400, Lowell Gilbert wrote: >> > > > >> > > > > Slawa Olhovchenkov <slw@zxy.spb.ru> writes: >> > > > > >> > > > > > On Fri, Jun 03, 2016 at 02:34:18PM -0400, Lowell Gilbert >> wrote: >> > > > > > >> > > > > >> Slawa Olhovchenkov <slw@zxy.spb.ru> writes: >> > > > > >> >> > > > > >> > Default install with local_unbound and ntpd can't be >> functional >> > with >> > > > > >> > incorrect date/time in BIOS: >> > > > > >> > >> > > > > >> > Unbound requred correct time for DNSSEC check and refuseing >> > queries >> > > > > >> > ("Jul 1 20:17:29 yellowrat unbound: [3444:0] info: failed >> to >> > prime >> > > > > >> > trust anchor -- DNSKEY rrset is not secure . DNSKEY IN") >> > > > > >> > >> > > > > >> > ntpd don't have any numeric IP of ntp servers in ntp.conf >> -- >> > only >> > > > > >> > symbolic names like 0.freebsd.pool.ntp.org, as result -- >> can't >> > > > > >> > resolve (see above, about DNSKEY). >> > > > > >> >> > > > > >> I can't see how this would happen. DNSSEC doesn't seem to be >> > required >> > > > in >> > > > > >> a regular install as far as I can see. Certainly I don't >> have any >> > > > > > >> > > > > > I don't know reasson for enforcing DNSSEC in regular install. >> > > > > > I am just select `local_unbound` at setup time and enter >> > `127.0.0.1` as >> > > > > > nameserver address. >> > > > > >> > > > > That's not enough to configure unbound as a fully recursive DNS >> > > > > server. >> > > > >> > > > What I am missing? >> > > > Need to fix unbound setup scripts? bsdinstall scripts? >> > > > As I see unbound setup scripts detects 127.0.0.1 in resolv.conf >> and >> > > > configured unbound as fully recursive DNS server. >> > > > >> > > > > If your system gets its address through DHCP, it is probably >> > > > > getting DNS server addresses as well, and would work fine >> *without* >> > your >> > > > > configuring any of the DNS state. >> > > > >> > > > I am have static address and don't getting DNS server address. >> > > > >> > > > > >> problem on any of my systems, and I've never configured an >> anchor >> > on >> > > > the >> > > > > >> internal systems. >> > > > > >> >> > > > > >> > IMHO, ntp.conf need to include some numeric IP of public >> ntp >> > > > servers. >> > > > > >> >> > > > > >> Ouch; that's a terrible idea, for several different reasons. >> > > > > > >> > > > > > What else? >> > > > > >> > > > > All the normal reasons that hard-coding IP addresses is a bad >> idea; >> > they >> > > > > can change, you're encouraging a lot of people to use the same >> ones, >> > etc. >> > > > >> > > > And how to resolve this issuse: >> > > > >> > > > - default install with unbound as recursive DNS server (by default >> > > > enforcing DNSSEC) >> > > > - ntp time synchronisation >> > > > - stale CMOS time (2008 year) >> > > > _______________________________________________ >> > > > freebsd-stable@freebsd.org mailing list >> > > > https://lists.freebsd.org/mailman/listinfo/freebsd-stable >> > > > To unsubscribe, send any mail to " >> > freebsd-stable-unsubscribe@freebsd.org" >> > > > >> > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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