| |
| |
| |
|
Page: 1 2
Comments:
<0> twkm, about the dns that masked the other yesterday, i suspect this is due to long time to expiry on dynamically updated zone (through dhcp3-server). how can i limit cacheing?
<1> limit caching on what specifically
<1> ddns-ttl dhcpd directive
<1> usually half, or less than half of your dhcp lease times
<0> since pages are being dynamically updated, i'd like them not to be cached on other servers
<1> pages?
<1> i thought you were talking about dhcp dynamic updates
<0> zones, of course
<1> then say that, you confused me :)
<1> ddns-ttl will set the TTL (time-to-live) for the records its updating
<1> and define for me 'other servers' ?
<0> sorry. ttl is been correcly set, according to the leases validity term.
<0> other servers are dns servers referring to this one
<1> so only allow internal resolution for that zone
<0> then other server will allways refer to it?
<1> well it depends, are the other NS's on your local lan
<1> or external to it?
<0> on the lan
<1> differetn subnet to the rest of the lan, or same?
<1> and whats the reasoning behind not wanting them to cache it ?
<0> different subnets, different subdomains
<1> well, if the servers are seperate to the workstations, you could allow-query workstation-subnet-only
<0> i want server1 to forward to server2, but i don't want server1 to be able to cache the answer
<1> uh.
<1> then why have it there in the first place?
<0> ?
<1> if server one is providing any redundancy/caching for server2, then why have it there?
<1> whats its use.
<0> server1 is serving lan1, which is inside a machine (with uml clients).
<1> sounds odd.
<0> server2 is a real lan server. in case server1 has no answer, i want it to forward to server2, which has also forwarding to the internet servers
<1> real lan server, as opposed to not real?
<1> why not just create a nice central ns structure, for all lan subnets to use?
<0> they are lans, but one is of virtual machines.
<1> virtual shmirtual :)
<1> you have how many zones
<0> i might proceed so, but server2 should be kept very simple: one subnet, one domain
<1> on what logic
<0> it will become a home server for consumers
<1> dns's master/slave foundation is its major forte, not using it seems to be a little backwards
<1> having two local servers, each servicing a single subnet, is fair enough, but wanting to hack around and tell certain servers to cache certain zones, and not others, is a little odd
<1> im sure it could be done, sounds like bind views is what you want, if not then allow-query
<1> im not sur ehow you could go about telling a server it can have an answer, but it cant cache it.
<1> other than setting ttl's to 5 seconds
<1> I mean, if a server can get an answer, whats the difference if it caches it or not
<1> if youre worried about the cached information being obsoleted by new information, the dhcp ddns-ttl option takes care of that
<1> Making sure that ddns records added to the NS live a lesser amount of time than the dhcp leases themselves
<1> Either way, something is missing from your logic.
<0> as the server is using ddns, it is the only one to know the record status, and i would like every server to ask it, w/o remembering the answer
<1> Either the reason behind what you want to do, or the implementation itself
<1> like i said
<1> if the main dhcp server gives out a dhcp lease, and its lease time is say 3600 (1h)
<1> and the ddns record ttl is 1800 (30minutes)
<1> then the ddns records in dns will not be cached when that lease is renewed
<1> or expired
<0> but the client disconnects after 900 seconst?
<0> *seconds
<1> so drop your ddns-ttls.
<1> so they are only cached for 1 minute, 2 minutes, whatever
<1> hell, set them to 1s.
<1> what you set the TTL's is up to you, and dependant on what you want to do
<0> the dhcp is automatically removing the record, disregarding ttl
<1> either way, dns can exist without clients attached to them
<1> says who ?
<0> but i want it to resolv only clients really attached
<1> good luck with that :)
<0> thanks
<1> then i suggest you write a script to ping every client every 5 seconds, and have it use nsupdate to remove the records for that IP, if no ping reply is found
<1> :)
<1> and then youre talking about overkill.
<1> [10:42] <0> but i want it to resolv only clients really attached
<1> tell me why you want that?
<1> whats the benefit, or problem that it solves
<0> ok, this is a total solution. all i need is done by dhcp already: it removes disconnected clients from bind repository
<0> i mean clients that do dhcprelease
<1> what happens when a client just dies?
<0> ttl expires
<1> roger that.
<1> how long are your lease times?
<0> i don't seek an overkill, just a fairly maintained ddns environment
<0> 300s
<0> i think the answer is in the zone soa. where can i find it's doc?
<1> well, youve got a default ttl for the zone, individual record ttl's, and the bind9 negative cache ttl.
<0> what is this negative cache?
<1> google it
<0> thanks. sorry for upsetting you :)
<1> You didnt upset me :)
<0> it's sometimes hard to define what i want, and discussing with you, i see it clearer, thanks :)
<1> we all go through those phases
<0> right, especially on new fields
<1> right :)
<0> eyecue, ddns-ttl rocks!
<1> indeed
<1> :)
<2> when i ping my domain i get "TTL expired in transit" whats wrong?
<1> www.dnsreport.com
<2> Reverse DNS entries for MX records failed. What can I do about it?
<1> Doesnt sound related, but your mx records should have reverse record 'existant', at the very least, if not matching.
<2> when I ping my domain, I also get timeout errors, and the ip showing is the wrong one
<2> Also when I run the E-mail Tester on dnsreport.com It show the wrong IP for my domain
<1> whats the domain
<2> www.aristos.net
<1> aristos.net
<1> doesnt look too shabby
<1> whats the ipposed to be
<2> you can see aristos.net?
<2> It doesn't open for me
<1> in dnsreport yeh
<1> whats the ip 'meant' to be for the www record ?
<2> 83.168.26.144
<1> ;; ANSWER SECTION:
<1> www.aristos.net. 300 IN A 83.168.27.146
<1> thats what i get
<2> yes
<2> thats wrong
<1> whats the primary ns servers ip ?
<2> 69.72.158.226
<2> or ns2.zoneedit.com
<1> the primary ns says its www.aristos.net. 300 IN A 83.168.27.146
<0> helo, sounds like it has dynamic ip, and the dns has not been updated
<1> so it hasto be updated there
<2> but when i login to zoneedit my domain shows me the correct ip
<2> in the IP addresses field
<1> it hasnt updated then
<2> but it's ben so many hours since my ip chaged
<2> shouldnt be a matter of minutes?
<0> maybe you can set a shorter ttl of the record?
<2> no idea what you've just said
<2> I have Edit SOA Values in zoneedit interface
<2> Refresh Rate: Retry Rate: Expire Time: Time To Live:
<0> time to live. eyecue, am i rught?
<1> yup
<1> the time for which a record will be cached by a querying client
<2> time to live is currently set to 7200
<2> seconds
<1> 2 hours.
<0> so the next time, no server will keep the stale information too much
<2> should i chnage that?
<2> I never had these problems before. Each time my ip chnaged it took a few minutes, and the domain would resolve to the new I.
<2> IP
<0> you may have used anothe dns yourself, probably the same one as the provider
<0> you can do it now, too
<2> the dns for the domain has been the same for a long time now. The only thing that ever changes is the ip of the computer hosting the website, and theres a client on that pc resposible for telling zoneedit what the new ip is
<2> what should i do?
<0> your registrar name servers should be the zoneedit ns. this change might take 1 day, but afterwards, you will be in sync at every change
<2> dude, like i said, i have been using the same dns servers for that domain, for a long time now. Nothing changes, only the IP of the host.
<2> my registrar is alrealy configured with those 2 dns servers for more than a year.
<1> If its been working, and it doesnt anymore, and youre adamant you have made NO configuration changes, then either zeonedit have, or you have (and you cant remember)
<2> they only thing changed, is the IP, and it was changed last night.
Return to
#dns
or
Go to some related
logs:
cannot open lookup module ldap:
Xlib: ext Xfree86-DRI
pyv4l ubuntu
xorg-x11 accelmethod radeon
fc4 x.org mouse sensitivity
wxglade WXU_2.6
gentoo use fortran gcc-4.
#centos
gentoo Davicom 21x4x 21x4x DEC-Tulip compatible
#php
|
|