Nagios Support Forum

Posted: **Mon Dec 19, 2016 10:52 am**

Is your XI system setup to use proxies? If so, use this document for reference - https://support.nagios.com/kb/article.php?id=147

What you'll want to do, is add the IP for the esensor under the no_proxy, and it should work at that point.

Posted: **Mon Dec 19, 2016 12:05 pm**

Hi,

I added the Esensor on nagios but the nagios can not read the value exist on esonsor
So how can read it without proxy because the admin opened any
From proxy

Posted: **Mon Dec 19, 2016 2:25 pm**

bashar.abed wrote:Hi,

I added the Esensor on nagios but the nagios can not read the value exist on esonsor
So how can read it without proxy because the admin opened any
From proxy

See my above post about 'no_proxy' which will tell it not to proxy traffic to that IP.

rkennedy wrote:Is your XI system setup to use proxies? If so, use this document for reference - https://support.nagios.com/kb/article.php?id=147

What you'll want to do, is add the IP for the esensor under the no_proxy, and it should work at that point.

Posted: **Mon Dec 19, 2016 2:47 pm**

Hi
You mean I should used this command on nagios root
No_proxy 10.x.x.x

10.x.x.x related to ip sensor machine

Thanks

Posted: **Mon Dec 19, 2016 3:32 pm**

Yep, exactly. I think it's No_proxy=10.x.x.x though. If you get confused, try it, and let us know the full result.

Posted: **Tue Dec 20, 2016 6:32 am**

Hi,
see the below result after applied No_proxy command

[root@nms ~]# No_proxy=IP-Sensor
[root@nms ~]# curl http://IP-sensor/index.html?em345678 –v


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><style type="text/css">html,body{height:100%;padding:0;margin:0;}.oc{display:table;width:100%;height:100%;}.ic{display:table-cell;vertical-align:middle;height:100%;}div.msg{display:block;border:1px solid #30c;padding:0;width:500px;font-family:helvetica,sans-serif;margin:10px auto;}h1{font-weight:bold;color:#fff;font-size:14px;margin:0;padding:2px;text-align:center;background: #30c;}p{font-size:12px;margin:15px auto;width:75%;font-family:helvetica,sans-serif;text-align:left;}</style><title>Access Denied</title></head><body><div class="oc"><div class="ic"><div class="msg"><h1>Access Denied</h1><p>The page you requested has been blocked by a firewall policy restriction.</p></div></div></div></body></html>


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><style type="text/css">html,body{height:100%;padding:0;margin:0;}.oc{display:table;width:100%;height:100%;}.ic{display:table-cell;vertical-align:middle;height:100%;}div.msg{display:block;border:1px solid #30c;padding:0;width:500px;font-family:helvetica,sans-serif;margin:10px auto;}h1{font-weight:bold;color:#fff;font-size:14px;margin:0;padding:2px;text-align:center;background: #30c;}p{font-size:12px;margin:15px auto;width:75%;font-family:helvetica,sans-serif;text-align:left;}</style><title>504 DNS look up failed</title></head><body><div class="oc"><div class="ic"><div class="msg"><h1>504 DNS look up failed</h1><p><p>The webserver reported that an error occurred while trying to access the website. Please click <u><a href="javascript:history.back()">here</a></u> to return to the previous page.</p>
<p>
URL = http://xn--v-5gn<br />
<br/>Client IP: Nagios-IP
<br/>Server IP: N/A
<br/>User name:
<br/>Group name:
</p></p></div></div></div></body></html>
[root@nms ~]#

Thanks

Posted: **Tue Dec 20, 2016 1:19 pm**

You may have to allow a direct connection between the XI server and the Esensor to get this to work as it may not use the proxy settings.

In your output from the curl command, I am seeing a 504 DNS lookup error and that that a firewall blocked the connection. Those have to be fixed before you can check that sensor.
See if you can get the Nagios server setup to bypass the firewall and that should fix it for you.

Posted: **Tue Dec 20, 2016 2:48 pm**

Hi,
How can bypass the firewall on nagios to reach esensor

Thanks

Posted: **Tue Dec 20, 2016 3:06 pm**

We are going to need to know a bit more about your firewall to answer that question. If you are using IPTables, https://wiki.centos.org/HowTos/Network/IPTables should help. I tried to find some nftables documentation for CentOS and I could not. If you are using some sort of firewall appliance, could you tell us the model? If you don't wish to do that for security purposes, you can PM the information to me.

If you do PM the model #, please make sure you update this thread. That is the only way for the thread to pop back up on our board. Thanks!

Posted: **Wed Dec 21, 2016 7:36 am**

Hi,

kindly to be notified that there is no IPTable Firewall configured on Nagios System
also i have applied the below command curl --noproxy http://IP-Sensor/index.html?em345678 –v
and i have got the below result

[root@nms ~]# curl --noproxy http://IP-Sensor/index.html?em345678 –v


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><style type="text/css">html,body{height:100%;padding:0;margin:0;}.oc{display:table;width:100%;height:100%;}.ic{display:table-cell;vertical-align:middle;height:100%;}div.msg{display:block;border:1px solid #30c;padding:0;width:500px;font-family:helvetica,sans-serif;margin:10px auto;}h1{font-weight:bold;color:#fff;font-size:14px;margin:0;padding:2px;text-align:center;background: #30c;}p{font-size:12px;margin:15px auto;width:75%;font-family:helvetica,sans-serif;text-align:left;}</style><title>504 DNS look up failed</title></head><body><div class="oc"><div class="ic"><div class="msg"><h1>504 DNS look up failed</h1><p><p>The webserver reported that an error occurred while trying to access the website. Please click <u><a href="javascript:history.back()">here</a></u> to return to the previous page.</p>
<p>
URL = http://xn--v-5gn<br />
<br/>Client IP: IP-Nagios
<br/>Server IP: N/A
<br/>User name:
<br/>Group name:
</p></p></div></div></div></body></html>
You have new mail in /var/spool/mail/root
[root@nms ~]#

there is ASA firewall between Nagios and Esensor device with permit any policies
but when i applied nc command the result appear as send before for you !
please advice

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