[Dnsmasq-discuss] max-ttl Problem

[SamLT]

On Tue, Oct 05, 2010 at 11:09:03PM -0700, Mohammad Shakir wrote:
> I have checked the upstream server give 4min for v7.lscache4.c.youtube.com site so my dns should override its expire time and gives it 8 days which I have defined in my configuration but its not working.
> 
> 

upstream-ttl = 4min
max-ttl = 8days

max-ttl > upstream-ttl


> --- On Tue, 10/5/10, SamLT <samuel.lethiec at intelunix.fr> wrote:
> 
> From: SamLT <samuel.lethiec at intelunix.fr>
> Subject: Re: [Dnsmasq-discuss] max-ttl Problem
> To: "Mohammad Shakir" <s_barkati at yahoo.com>
> Cc: dnsmasq-discuss at lists.thekelleys.org.uk
> Date: Tuesday, October 5, 2010, 10:33 PM
> 
> On Tue, Oct 05, 2010 at 10:21:17PM -0700, Mohammad Shakir wrote:
> > I have complie dnsmasq version 2.55 on Centos 5.3 and facing problem in max-ttl option.
> > 
> > I set max-ttl=691200 and try to check it, I think its not working. I want if any request goes through my dns its store for 8 days.
> 
> 
> From the manual:
>  The specified maximum TTL will be given to clients instead of the true TTL
>  value if it is lower
> 
> 
> It may be confusing a little but it's "if the maximum TTL (max-ttl) is lower
> than the true TTL given by the upstream servers
> 
> 
> 
> > 
> > Here is my configuration which I set in my dnsmasq.conf file.
> > 
> > bogus-priv
> > filterwin2k
> > cache-size=59000
> > no-negcache
> > dns-forward-max=25000 
> > max-ttl=691200
> > 
> > And here is my testing result.
> > 
> > [root at cache ~]# ifconfig eth1
> > eth1      Link encap:Ethernet  HWaddr 4C:00:10:3A:62:90  
> >           inet addr:172.16.173.1  Bcast:172.16.173.255  Mask:255.255.255.0
> >           inet6 addr: fe80::4e00:10ff:fe3a:6290/64 Scope:Link
> >           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >           RX packets:800250915 errors:7 dropped:0 overruns:0 frame:0
> >           TX packets:965491461 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:1000 
> >           RX bytes:1194681302 (1.1 GiB)  TX bytes:2148168146 (2.0 GiB)
> >           Interrupt:177 Base address:0x2000
> > 
> > [root at cache ~]# dig @172.16.173.1 v7.lscache4.c.youtube.com
> > 
> > ; <<>> DiG 9.3.4-P1 <<>> @172.16.173.1 v7.lscache4.c.youtube.com
> > ; (1 server found)
> > ;; global options:  printcmd
> > ;; Got answer:
> > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29731
> > ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
> > 
> > ;; QUESTION SECTION:
> > ;v7.lscache4.c.youtube.com.     IN      A
> > 
> > ;; ANSWER SECTION:
> > v7.lscache4.c.youtube.com. 211  IN      A       221.120.218.34
> > 
> > ;; Query time: 18 msec
> > ;; SERVER: 172.16.173.1#53(172.16.173.1)
> > ;; WHEN: Wed Oct  6 09:37:58 2010
> > ;; MSG SIZE  rcvd: 59
> > 
> > [root at cache ~]# dig @172.16.173.1 v7.lscache4.c.youtube.com
> > 
> > ; <<>> DiG 9.3.4-P1 <<>> @172.16.173.1 v7.lscache4.c.youtube.com
> > ; (1 server found)
> > ;; global options:  printcmd
> > ;; Got answer:
> > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8861
> > ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
> > 
> > ;; QUESTION SECTION:
> > ;v7.lscache4.c.youtube.com.     IN      A
> > 
> > ;; ANSWER SECTION:
> > v7.lscache4.c.youtube.com. 178  IN      A       221.120.218.34
> > 
> > ;; Query time: 0 msec
> > ;; SERVER: 172.16.173.1#53(172.16.173.1)
> > ;; WHEN: Wed Oct  6 09:38:31 2010
> > ;; MSG SIZE  rcvd: 59
> > 
> > 
> > [root at cache ~]# dig @172.16.173.1 v7.lscache4.c.youtube.com
> > 
> > ; <<>> DiG 9.3.4-P1 <<>> @172.16.173.1 v7.lscache4.c.youtube.com
> > ; (1 server found)
> > ;; global options:  printcmd
> > ;; Got answer:
> > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60814
> > ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
> > 
> > ;; QUESTION SECTION:
> > ;v7.lscache4.c.youtube.com.     IN      A
> > 
> > ;; ANSWER SECTION:
> > v7.lscache4.c.youtube.com. 300  IN      A       221.120.218.34
> > 
> > ;; AUTHORITY SECTION:
> > youtube.com.            311     IN      NS      ns3.google.com.
> > youtube.com.            311     IN      NS      ns2.google.com.
> > youtube.com.            311     IN      NS      ns1.google.com.
> > youtube.com.            311     IN      NS      ns4.google.com.
> > 
> > ;; ADDITIONAL SECTION:
> > ns1.google.com.         94146   IN      A       216.239.32.10
> > ns2.google.com.         94146   IN      A       216.239.34.10
> > ns3.google.com.         94146   IN      A       216.239.36.10
> > ns4.google.com.         94146   IN      A       216.239.38.10
> > 
> > ;; Query time: 175 msec
> > ;; SERVER: 172.16.173.1#53(172.16.173.1)
> > ;; WHEN: Wed Oct  6 09:43:47 2010
> > ;; MSG SIZE  rcvd: 202
> > 
> > In first query to v7.lscache4.c.youtube.com its take 18msec in second query its take 0msec but in third query its take 175msec.
> > 
> > I hope you will understand my question.
> > 
> > 
> > 
> >       
> 
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> > Dnsmasq-discuss at lists.thekelleys.org.uk
> > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
> 
> 
> 
> 
>