Host is not allowed to talk to us!

[Andy Shellam]

Grant,

Are remote checks from your Nagios server to this NRPE client 
succeeding?  Is xxx.xxx.xxx.xxx one of your own, or an external IP 
address?  I'm thinking there may be a remote system trying to talk to 
your NRPE system that it's not allowing (which is correct.)  It could 
potentially be some sort of port scanner if your client is publicly 
accessible.

Regards,
Andy

Grant Lowe wrote:
> Hi Marc,
>
> Thanks for the quick reply.  Yes, I have the correct IP.  Also I already have debugging turned on in nrpe.cfg.  I have other clients connecting just fine.  I just restarted nrpe and I got this message:
>
> Dec 12 09:18:22 nagiosclient svc.startd[7]: [ID 748625 daemon.error] network/cswnrpe:default failed repeatedly
> Dec 12 09:19:25 nagiosclient nrpe[643]: [ID 601491 daemon.notice] Starting up daemon
> Dec 12 09:19:25 nagiosclient nrpe[643]: [ID 627629 daemon.notice] Warning: Daemon is configured to accept command arguments from clients!
> Dec 12 09:19:42 nagiosclient nrpe[649]: [ID 381997 daemon.error] Host xxx.xxx.xxx.xxx is not allowed to talk to us!
>
> We're not using IPV6, so I guess that's not a problem.  Other thoughts?
>
>
>
> ----- Original Message ----
> From: Marc Powell <marc at ena.com>
> To: nagios-user Mailinglist <nagios-users at lists.sourceforge.net>
> Sent: Friday, December 12, 2008 8:58:42 AM
> Subject: Re: [Nagios-users] Host is not allowed to talk to us!
>
>
> On Dec 12, 2008, at 10:23 AM, Grant Lowe wrote:
>
>   
>> Hi all,
>>
>> I'm getting a message from the syslog of my nrpe client that says:
>>
>> Host xxx.xxx.xxx.xxx is not allowed to talk to us!
>>
>> In the nrpe.cfg file I have the IP address of the nagios server:
>>
>> allowed_hosts=127.0.0.1,172.20.40.45
>>     
>
> The code around this error is very straightforward and looks like a  
> simple address match. Are you sure you have the correct IP and nrpe  
> has been restarted? Are you using IPV6 locally?
>
> In any event, putting nrpe into debug mode and watching /var/log/ 
> messages should be informative.
>
> --
> Marc
>
>
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