Problem with Check_DHCP

[Andreas Ericsson]

Please don't top-post. It's terribly annoying. Also keep in mind that it 
helps a lot if you post some command output rather than trying to tell 
us all how you think things are set up.

Fotios Magoufis wrote:
> Yes, I ran it as root and still no success.  If I execute the command as
> root, it works fine. 
> 

Nagios doesn't run check_dhcp as root then, no matter what you chmod'ed 
it too.

Does your ls -l output look something like this?

# ls -l check_dhcp
-rwsr-xr-x  1  root root 19876 Jun 30 19:03 check_dhcp

The important part here is the first s and that the owner is root.


Is the plugin located on a partition mounted with the nosuid option?

Is SELinux enabled and stripping suid binaries of their privileges?

Is check_dhcp a symlink somewhere, and were you daft enough to chmod the 
symlink rather than the actual file?

Does the directory where check_dhcp resides have the suid bit set?

Try this;
chown root:root check_dhcp
chmod 4711 check_dhcp
Did it work?


> 
> Fotios Magoufis | Operations Manager
> Furniture.com | 85 River Street Waltham, MA 02453 | 781-693-2131
> 
> -----Original Message-----
> From: Andreas Ericsson [mailto:ae at op5.se] 
> Sent: Monday, October 17, 2005 10:04 AM
> To: Fotios Magoufis
> Cc: Nagios-users at lists.sourceforge.net
> Subject: Re: [Nagios-users] Problem with Check_DHCP
> 
> Fotios Magoufis wrote:
> 
>>I've been having such a hard time getting the check_dhcp to work, but 
>>I still can't figure it out.  When the service runs as the nagios 
>>user, I get the following error:
>> 
>>Error: Could not bind socket to interface eth0. Check your privileges.
>> 
>>I tried setting chmod +s check_dhcp, but it did not have any positive 
>>effect.
>> 
>>Any ideas on how to fix?
>> 
> 
> 
> I suppose you did chmod +s check_dhcp as root, right?
> 
> Does it work when you run it as root from the console?
> 

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231


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