[Dnsmasq-discuss] max-ttl Problem

[Mohammad Shakir]

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.

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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