[Dnsmasq-discuss] Logging of DHCP activity

[SamLT]

On Wed, May 25, 2011 at 05:49:40AM -0400, dnsmasq at lovelady.com wrote:
> Hi, All:
> 
>  
> 
> I woke today to find that for the second time my /var/log filesytem was full
> due to the size of the messages log.  This time and last time, the log was
> over 95% due to dhcp logging, and I don't understand why.   I have commented
> out the log-dhcp line in /opt/etc/dnsmasq.conf (where my configuration
> lives), and have moved the messages file and restarted (rebooted) the
> server.  Each time, the logging of dhcp requests begins flooding anew.
> 
>  



I'd say you probably have a loop in your network, check that first.


> 
> These requests seem to come from a pair of interfaces on a Winblows 7
> machine, if that makes any difference, and apparently were the result of
> this configuration line:
> 
>  
> 
> dhcp-host=00:1d:09:59:7b:7c,00:21:5c:6a:03:ef,192.168.0.10,m1330c
> 
>  
> 
> . because I had interpreted the manual differently.  Clarity has arrived - I
> have disabled the wireless on the laptop - and logging is much less, but I
> still wonder why this logging continues.  What must I do to make it stop?
> 
>  
> 
> Here's the tail of that log:
> 
>  
> 
> lovestora-1 /home/delovelady> tail -20 /home/messages
> 
> May 24 05:08:20 lovestora-1 dnsmasq-dhcp[2037]: DHCPREQUEST(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> May 24 05:08:20 lovestora-1 dnsmasq-dhcp[2037]: DHCPACK(eth0) 192.168.0.10
> 00:1d:09:59:7b:7c m1330c
> 
> May 24 05:08:21 lovestora-1 dnsmasq-dhcp[2037]: DHCPDISCOVER(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> May 24 05:08:21 lovestora-1 dnsmasq-dhcp[2037]: DHCPOFFER(eth0) 192.168.0.10
> 00:1d:09:59:7b:7c
> 
> May 24 05:08:21 lovestora-1 dnsmasq-dhcp[2037]: DHCPREQUEST(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> May 24 05:08:21 lovestora-1 dnsmasq-dhcp[2037]: DHCPACK(eth0) 192.168.0.10
> 00:1d:09:59:7b:7c m1330c
> 
> May 24 05:08:22 lovestora-1 dnsmasq-dhcp[2037]: DHCPDISCOVER(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> May 24 05:08:22 lovestora-1 dnsmasq-dhcp[2037]: DHCPOFFER(eth0) 192.168.0.10
> 00:1d:09:59:7b:7c
> 
> May 24 05:08:22 lovestora-1 dnsmasq-dhcp[2037]: DHCPREQUEST(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> May 24 05:08:22 lovestora-1 dnsmasq-dhcp[2037]: DHCPACK(eth0) 192.168.0.10
> 00:1d:09:59:7b:7c m1330c
> 
> May 24 05:08:23 lovestora-1 dnsmasq-dhcp[2037]: DHCPDISCOVER(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> May 24 05:08:23 lovestora-1 dnsmasq-dhcp[2037]: DHCPOFFER(eth0) 192.168.0.10
> 00:1d:09:59:7b:7c
> 
> May 24 05:08:23 lovestora-1 dnsmasq-dhcp[2037]: DHCPREQUEST(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> May 24 05:08:23 lovestora-1 dnsmasq-dhcp[2037]: DHCPACK(eth0) 192.168.0.10
> 00:1d:09:59:7b:7c m1330c
> 
> May 24 05:08:24 lovestora-1 dnsmasq-dhcp[2037]: DHCPDISCOVER(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> May 24 05:08:24 lovestora-1 dnsmasq-dhcp[2037]: DHCPOFFER(eth0) 192.168.0.10
> 00:1d:09:59:7b:7c
> 
> May 24 05:08:24 lovestora-1 dnsmasq-dhcp[2037]: DHCPREQUEST(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> May 24 05:08:24 lovestora-1 dnsmasq-dhcp[2037]: DHCPACK(eth0) 192.168.0.10
> 00:1d:09:59:7b:7c m1330c
> 
> May 24 05:08:25 lovestora-1 dnsmasq-dhcp[2037]: DHCPDISCOVER(eth0)
> 192.168.0.10 00:1d:09:59:7b:7c
> 
> lovestora-1 /home/delovelady>
> 
>  
> 
> Here are all the uncommented lines from dnsmasq.conf:
> 
>  
> 
> lovestora-1 /home/delovelady> grep -v '^#' /opt/etc/dnsmasq.conf | grep -v
> '^$'
> 
> domain-needed
> 
> bogus-priv
> 
> expand-hosts
> 
> domain=lovelady.com
> 
> dhcp-range=192.168.0.10,192.168.0.109,7d
> 
> dhcp-host=88:87:17:12:69:4d,canon-8120,192.168.0.5,infinite
> 
> dhcp-host=00:23:8b:8a:ad:70,aspire,192.168.0.12,infinite
> 
> dhcp-host=00:26:F2:DB:95:0C,lovestora-0,192.168.0.250,infinite
> 
> dhcp-host=00:1d:09:59:7b:7c,00:21:5c:6a:03:ef,192.168.0.10,m1330c
> 
> dhcp-option=3,192.168.0.1
> 
> dhcp-option=option:router,192.168.0.1
> 
> lovestora-1 /home/delovelady>
> 
>  
> 
>  
> 
> Dennis Lovelady
> 404-386-9745 (c)
> AIM/Skype: delovelady      MSN: fastcounter at lovelady.com
> --
> "A banker warned the British poet Robert Graves that one could not grow rich
> writing poetry.  He replied that if there was no money in poetry, there was
> certainly no poetry in money, and so it was all even."
>        - Robert Graves 
> 
>  
> 
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> 
>  
> 



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