Still not working: root@nagios:/usr/lib/nagios/plugins# ./check_dhcp -v DHCP socket: 3 Error: Could not bind socket to interface eth0. Check your privileges... root@nagios:/usr/lib/nagios/plugins# ll -lsa check_dhcp 36 -rwsrwxrwx 1 root root 34344 2010-02-04 07:09 check_dhcp* Markus Franke | Senior Network Engineer, Telecommunications Services | THE WESTPAC GROUP | P 02 8253 (2) 3164 | M 0409 612 643 | E mfranke@westpac.com.au | W www.westpac.com.au | Westpac Banking Corporation, Level 25, 275 Kent Street, SYDNEY NSW 2000 | QP Please consider the environment before printing this email <table width=100%> <tr valign=top> <td width=40%>Ton Voon <tonvoon@gmail.com> 01/04/2011 03:01 AM <table border> <tr valign=top> <td bgcolor=white> <div align=center>Please respond to Nagios Plugin Development Mailing List <nagiosplug-devel@lists.sourceforge.net></div></table> <td width=59%> <table width=100%> <tr valign=top> <td> <div align=right>To</div> <td>Nagios Plugin Development Mailing List <nagiosplug-devel@lists.sourceforge.net> <tr valign=top> <td> <div align=right>cc</div> <td> <tr valign=top> <td> <div align=right>Subject</div> <td>Re: [Nagiosplug-devel] ./check_dhcp in Nagios</table> <table> <tr valign=top> <td> <td></table> </table> You need the root setuid flag: chmod u+s check_dhcp On 31 Mar 2011, at 01:26, Markus Franke wrote: Hi, I am trying to use the "check_dhcp" pluggin to check dhcp leases, etc. on production servers. I keep getting the following error: root@nagios:/usr/lib/nagios/plugins# ./check_dhcp -v DHCP socket: 3 Error: Could not bind socket to interface eth0. Check your privileges... After ensuring the permissions are set correctly (-rwxrwxrwx 1 root root 34344 2010-02-04 07:09 check_dhcp* ) and attempting to run the binary executable from to root account, I still get the same error. What else can I check ? Note: Nagios pluggins are running the following level: ./check_tcp -V check_tcp v1.4.14 (nagios-plugins 1.4.14) root@nagios:/usr/lib/nagios/plugins# Markus Franke | Senior Network Engineer, Telecommunications Services | THE WESTPAC GROUP | P 02 8253 (2) 3164 | M 0409 612 643 | E <a href=mailto:mfranke@westpac.com.au>mfranke@westpac.com.au</a> | W <a href=http://www.westpac.com.au/>www.westpac.com.au</a> | Westpac Banking Corporation, Level 25, 275 Kent Street, SYDNEY NSW 2000 | QP Please consider the environment before printing this email Unless otherwise stated, this email is confidential. If received in error, please delete and inform the sender by return email. Unauthorised use, copying or distribution is prohibited. Westpac Banking Corporation (ABN 33 007 457 141) is not responsible for viruses, or for delays, errors or interception in transmission. Unless stated or apparent from its terms, any opinion is not the opinion of Westpac Banking Corporation. 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If received in error, please delete and inform the sender by return email. Unauthorised use, copying or distribution is prohibited. Westpac Banking Corporation (ABN 33 007 457 141) is not responsible for viruses, or for delays, errors or interception in transmission. Unless stated or apparent from its terms, any opinion is not the opinion of Westpac Banking Corporation. This message also includes information on Westpac Institutional Bank available at westpac.com.au/wibinfo