check_dhcp / Error: Could not bind socket to interface... (permissions are ok)

[Ralf Gross]

Hi,

I can use the check_dhcp plugin as user nagios from command line.

[nagios at wl000339 libexec]$ ./check_dhcp -s 192.168.0.5 -r 192.168.0.55 -i
eth0
DHCP ok: Received 4 DHCPOFFER(s), 1 of 1 requested servers responded,
requested address (192.168.0.55) was offered, max lease time = 0 sec.

chech_dhcp file has the following permissions an is suid root:

-rwsr-x---    1 root     nagios      19501 Mai 27 16:01 check_dhcp

User nagios is in group nagios and nagios runs as user nagios.

uid=502(nagios) gid=502(nagios) groups=502(nagios),503(nagiocmd)

nagios   17901  0.0  0.4  2068 1056 ?        S    17:07   0:00
/opt/nagios/bin/nagios -d /opt/nagios/etc/nagios.cfg

If I use check_dhcp in the services.cfg, I always get the following error
on the Service Detail webpage.

 Could not bind socket to interface 192.168..  Check your privileges...


I have no idea what the problem is, the permissions/ownership should be ok.

Any ideas?

Ralf






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