[gentoo-user] local caching DNS?

[gentoo-user] local caching DNS?

[Ralf Stephan]

Hello,

I'm fed up with waiting for ever the same name requests from my
browser (and open servers don't cut it either): which DNS cache
or caching DNS for simple local installation would you recommend?

Regards,
ralf
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Re: [gentoo-user] local caching DNS?

[Michal 'vorner' Vaner]

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Hello

On Wed, Apr 09, 2008 at 12:13:40PM +0200, Ralf Stephan wrote:
> I'm fed up with waiting for ever the same name requests from my
> browser (and open servers don't cut it either): which DNS cache
> or caching DNS for simple local installation would you recommend?

I use dnsmasq, can be used as a LAN cache too (by simply allowing
requests from a given interface). Took me about 30 minutes to configure.
I asked dhcp to save to resolv.conf.2 and made resolv.conf to request
from localhost.

-- 
~, sweet ~

Michal 'vorner' Vaner

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Re: [gentoo-user] local caching DNS?

[Andrew Gaydenko]

======= On Wednesday 09 April 2008, Michal 'vorner' Vaner wrote: =======
> Hello
>
> On Wed, Apr 09, 2008 at 12:13:40PM +0200, Ralf Stephan wrote:
> > I'm fed up with waiting for ever the same name requests from my
> > browser (and open servers don't cut it either): which DNS cache
> > or caching DNS for simple local installation would you recommend?
>
> I use dnsmasq, can be used as a LAN cache too (by simply allowing
> requests from a given interface). Took me about 30 minutes to
> configure. I asked dhcp to save to resolv.conf.2 and made resolv.conf
> to request from localhost.

What about permanent (with saving to hdd) caching? It seems like pdnsd 
do this thing only...
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Re: [gentoo-user] local caching DNS?

[Michal 'vorner' Vaner]

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Hello

On Wed, Apr 09, 2008 at 02:45:18PM +0400, Andrew Gaydenko wrote:
> > On Wed, Apr 09, 2008 at 12:13:40PM +0200, Ralf Stephan wrote:
> > > I'm fed up with waiting for ever the same name requests from my
> > > browser (and open servers don't cut it either): which DNS cache
> > > or caching DNS for simple local installation would you recommend?
> >
> > I use dnsmasq, can be used as a LAN cache too (by simply allowing
> > requests from a given interface). Took me about 30 minutes to
> > configure. I asked dhcp to save to resolv.conf.2 and made resolv.conf
> > to request from localhost.
> 
> What about permanent (with saving to hdd) caching? It seems like pdnsd 
> do this thing only...

Does not seem to matter here much, since I suspend, not turn off. But
anyway, most DNS names should be cached only few hours, half a day or so
(well, there are some that have week long timeouts, but not many).

-- 
chown -R us $BASE

Michal 'vorner' Vaner

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Re: [gentoo-user] local caching DNS?

[Andrew Gaydenko]

Hi!
======= On Wednesday 09 April 2008, you wrote: =======
...
>
> Does not seem to matter here much, since I suspend, not turn off. But
> anyway, most DNS names should be cached only few hours, half a day or
> so (well, there are some that have week long timeouts, but not many).

Not sure I have noticed drawbacks of using a permanent cache during few 
years - probably I use too stable net resources  :-)
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Re: [gentoo-user] local caching DNS?

[kashani]

Andrew Gaydenko wrote:
> Hi!
> ======= On Wednesday 09 April 2008, you wrote: =======
> ...
>> Does not seem to matter here much, since I suspend, not turn off. But
>> anyway, most DNS names should be cached only few hours, half a day or
>> so (well, there are some that have week long timeouts, but not many).
> 
> Not sure I have noticed drawbacks of using a permanent cache during few 
> years - probably I use too stable net resources  :-)

	As an admin that occasionally has cause to shift traffic between coasts 
for maintenance I hate *hate* anything that ignores my TTLs and consider 
such software broken and bane upon our fair Internet.

kashani
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Re: [gentoo-user] local caching DNS?

[Ralf Stephan]

vorner wrote 
> I use dnsmasq, can be used as a LAN cache too (by simply allowing
> requests from a given interface). Took me about 30 minutes to configure.
> I asked dhcp to save to resolv.conf.2 and made resolv.conf to request
> from localhost.

OK this works fine, thanks. However, udhcpd cannt be coaxed to
write the servers to the new file, am I missing something?

But it's not too bad, I don't reboot often.


Thanks for all the answers (and questions ;)
ralf
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Re: [gentoo-user] local caching DNS?

[Neil Bothwick]

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On Wed, 9 Apr 2008 17:01:33 +0200, Ralf Stephan wrote:

> > I use dnsmasq, can be used as a LAN cache too (by simply allowing
> > requests from a given interface). Took me about 30 minutes to
> > configure. I asked dhcp to save to resolv.conf.2 and made resolv.conf
> > to request from localhost.  
> 
> OK this works fine, thanks. However, udhcpd cannt be coaxed to
> write the servers to the new file, am I missing something?

dnsmasq can also operate as a DHCP server, so you don't need to use a
separate one.


-- 
Neil Bothwick

Things which must be shipped together as a set, aren't.

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Re: [gentoo-user] local caching DNS?

[Neil Bothwick]

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On Wed, 9 Apr 2008 12:13:40 +0200, Ralf Stephan wrote:

> I'm fed up with waiting for ever the same name requests from my
> browser (and open servers don't cut it either): which DNS cache
> or caching DNS for simple local installation would you recommend?

net-dns/dnsmasq


-- 
Neil Bothwick

Deja Foobar: A feeling of having made the same mistake before.

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Re: [gentoo-user] local caching DNS?

[AG]

Ralf Stephan ha scritto:
> Hello,
>
> I'm fed up with waiting for ever the same name requests from my
> browser (and open servers don't cut it either): which DNS cache
> or caching DNS for simple local installation would you recommend?
>
> Regards,
> ralf
>   
what about dnscache of djbdns tools?
took 2 minutes to setup via dnscache-setup script.

andrea
 
 
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Re: [gentoo-user] local caching DNS?

[Urs Schuetz]

On Wed, 09 Apr 2008, Ralf Stephan wrote:

> I'm fed up with waiting for ever the same name requests from my
> browser (and open servers don't cut it either): which DNS cache
> or caching DNS for simple local installation would you recommend?

I'm using the DNS of my router (D-Link DSL-500G). Works without client side installations.

Urs
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[gentoo-user] Re: local caching DNS?

[7v5w7go9ub0o]

Ralf Stephan wrote:
> Hello,
> 
> I'm fed up with waiting for ever the same name requests from my
> browser (and open servers don't cut it either): which DNS cache
> or caching DNS for simple local installation would you recommend?
> 

consider maradns <http://www.maradns.org/changelog.html>

- It is a recursive dns client/server (and authoritative server if 
desired), described in Portage as "Proxy DNS server with permanent caching>.

- It is extremely fast

- It avoids your ISP's DNS server entirely (your ISP's server may be out 
of date; poisoned; very slow; etc.)

- Download the current version from the web page, as the ebuild is out 
of date (sigh... of course).

HTH
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Re: [gentoo-user] Re: local caching DNS?

[Uwe Thiem]

On Wednesday 09 April 2008, 7v5w7go9ub0o wrote:
> Ralf Stephan wrote:
> > Hello,
> >
> > I'm fed up with waiting for ever the same name requests from my
> > browser (and open servers don't cut it either): which DNS cache
> > or caching DNS for simple local installation would you recommend?
>
> consider maradns <http://www.maradns.org/changelog.html>
>
> - It is a recursive dns client/server (and authoritative server if
> desired), described in Portage as "Proxy DNS server with permanent
> caching>.

Wiht permanent caching? If it really does this, not honouring TTLs, 
it's crap. That said, I actually don't know whether they mean 
permanent when they say permanent. ;-)

Uwe

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[gentoo-user] Re: local caching DNS?

[7v5w7go9ub0o]

Uwe Thiem wrote:
> On Wednesday 09 April 2008, 7v5w7go9ub0o wrote:
>> Ralf Stephan wrote:
>>> Hello,
>>>
>>> I'm fed up with waiting for ever the same name requests from my
>>> browser (and open servers don't cut it either): which DNS cache
>>> or caching DNS for simple local installation would you recommend?
>> consider maradns <http://www.maradns.org/changelog.html>
>>
>> - It is a recursive dns client/server (and authoritative server if
>> desired), described in Portage as "Proxy DNS server with permanent
>> caching>.
> 
> Wiht permanent caching? 

I don't know. I never found a reference to it in the documentation. I 
quoted portage because I thought it might make sense to others.

I'd *guess* that it means that it'll keep long-TTL records beyond a 
restart - i.e. it does not flush the cache at start up.


If it really does this, not honouring TTLs,
> it's crap. That said, I actually don't know whether they mean 
> permanent when they say permanent. ;-)


"When MaraDNS' recursive resolver receives a "host not there" reply, 
instead of using the SOA minimum of the "host not there" reply as the 
TTL (Look at RFC1034 §4.3.4), MaraDNS uses the TTL of the SOA reply.

MaraDNS keeps referral NS records in the cache for one day instead of 
the TTL specified by the remote server."

"MaraDNS recursive resolver treats any TTL shorter than min_ttl seconds 
(min_ttl_cname seconds when the record is a CNAME record) as if the TTL 
in question was min_ttl (or min_ttl_cname) seconds long when determining 
when to expire a record from MaraDNS' cache.

TTLs which are shorter than 20 seconds long are given a TTL of 20 
seconds; TTLs which are more than 63072000 (2 years) long are given a 
TTL of 2 years."


HTH
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Re: [gentoo-user] local caching DNS?

[Mark Kirkwood]

I just use bind - setup to lookup from my ISP's nameservers and cache only.

The main reason for this was my ISP's ones are very slow (sometime 0.5 s 
to resolve!) - turning on the cache made an enormous difference to the 
perceived performance.

Cheers

Mark

Ralf Stephan wrote:
> Hello,
>
> I'm fed up with waiting for ever the same name requests from my
> browser (and open servers don't cut it either): which DNS cache
> or caching DNS for simple local installation would you recommend?
>
> Regards,
> ralf
>   

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