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Paessler

211

Solutions

586

Contributors

Paessler AG’s award winning PRTG Network Monitor is a powerful, affordable and easy-to-use Unified Monitoring solution. It is a highly flexible and generic software for monitoring IT infrastructure, already in use at enterprises and organizations of all sizes and industries. Over 150,000 IT administrators in more than 170 countries rely on PRTG and gain peace of mind, confidence and convenience. Founded in 1997 and based in Nuremberg, Germany, Paessler AG remains a privately held company that is recognized as both a member of the Cisco Solution Partner Program and a VMware Technology Alliance Partner.

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I am having trouble getting netflow to work on PRTG from Cisco 800, 1800 and 2800 series routers.  

I configure a router to export v5 or v9 flows - same problem on each.

I go into PRTG and set up a corresponding sensor.  

I want detail, so in the channels section I tick detail on a couple of categories.  set all the other bits like listening IPS and port number

The sensor will go to 'OK' with a green icon, but not receive any data.  I try their netflow test tool and can see data hitting the machine, so I know that netflow is set up and the firewall is not an issue.  Playing with settings yields no results.  

I then set up a netflow listener for another router, but I don't change the channel definitions and it works!

I realise I need more detail, so I go into the sensor settings and tick 'No' for a couple of channels and 'Detail' for the OTHER channel.  

The graphs disappear.  The sensor stays green, but it show no data.  I wait 1/2 an hour and still no luck

I set the channel definitions back to defaults and wait.  The sensor still does not show any data.  This would be consistent with the first router.  Channel definitions were changed from defaults and the sensor will never work.  

I delete the sensor and add a new one with the same settings as before.  No data shows.  A broken sensor persists even after deleting it.  

Is this a PRTG bug or am I doing something wrong?

I want detailed graphs so I can identify what data is hogging bandwidth, …
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Hi all

I monitor my customers internet connections with PRTG and I am seeing spikes in outbound data.  It seems to be affecting about half of the connections I am monitoring.  It has been noticed because it saturates the upstream on some ADSL circuits providing VOIP, dropping calls.  

I have a customer with two networks, 1 voip and 1 data.  strangely, the bandwidth peaks affect both at the same time.  Then I noticed that it affects other customers at the same time!  I considered whether it is my monitoring platform, but some customers don't have them.    Attached are some graphs, with pink being the outbound data usage.  

The graphs show outages as a series of red dots, but I don't know if the line is down or whether it is simply that the upstream data is saturated so the usage data gets lost or the monitoring software times out before the SNMP response gets there.  

So for the purposes of this, please view the high upstream data and the outages as the same thing.  You will see that the times correlate across all the graphs, approx 9:05, 9~:30-9:45

Any suggestions as to what it is or even better - any ideas to prevent it would be greatly appreciated.  

The routers are all Cisco 867VAE, 887VA or 2821 and I use SNMP to monitor them.
Experts-Exchange-Graphs.pdf
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I've been using PRTG successfully for network monitoring for years.
Now I'm investigating using it for WINDOWS UPDATES STATUS.
I think I've followed the instructions at: https://www.paessler.com/manuals/prtg/windows_update_info_sensor
But, it doesn't work.

This is on a peer-to-peer network.
The error says:
Connecting to remote server SB-BACKUP failed with the following error message : WinRM cannot process the request. The following error with errorcode 0x80090311 occurred while using Kerberos authentication: We can't sign you in with this credential because your domain isn't available. Make sure your device is connected to your organization's network and try again. If you previously signed in on this device with another credential, you can sign in with that credential. Possible causes are: -The user name or password specified are invalid. -Kerberos is used when no authentication method and no user name are specified. -Kerberos accepts domain user names, but not local user names. -The Service Principal Name (SPN) for the remote computer name and port does not exist. -The client and remote computers are in different domains and there is no trust between the two domains. After checking for the above issues, try the following: -Check the Event Viewer for events related to authentication. -Change the authentication method; add the destination computer to the WinRM TrustedHosts configuration setting or use HTTPS transport. Note that computers in the TrustedHosts list
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I have multiple Cisco switches, from 2960's to 3750's.  I have them all configured via SSH, and randomly, after a few weeks, I can't connect via SSH anymore into them.  I use PRTG to monitor them, and I noticed that when something happens to the certificate, that's when I can't log in anymore, so my monitoring system displays an error for the cert.  When configuring SSH, does the default cert expire after a certain amount of time or something?

Any ideas how to fix this?
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I am trying to setup a remote probe but it does not connect to the core server. I have a sonicwall router behind my network.

In the core server I set the following
Probe Connection IPs; All IPs available on this computer
Allow IPs; the ip of the remote network
Mini Probes; Allow Mini Probes to connect to the web server
Access Type; Use the PRTG core service account (usually LOCAL SYSTEM)

On the remote probe I set the following
Server; my external IP
Copied the Access Key from the server to the remote.

It does not show up on the server core

Please help
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I need a detailed step by step process for installing snmp agent on both centos and debian. I am using prtg and of course, their instructions, as well as any i have found on the internet do not yield the desired results.

I dont really care about limiting this to ip addresses, but i could if it makes this easier.

I realize i have to insall snmp, edit the snmpd.conf file, edit the iptables, minimizing logging and who knows what else as despite following steps laid out, i cannot get any snmp readings.

Many of my servers are on virtual on a vmware host, as i would like to monitor them (2) as well.

I also have Mikrotik routers, and monitoring their snmp activiites as high cpu is a big red flag for several reasons.
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So far I have tried several free appliances for Hyper-V and open source solutions that I hit a road block. Tried some free solarwinds stuff - limits the number of devices, VeeamOne is great but you have to pay to get email alerting, Centreon and Zabbix you pretty much need to be a developer. Using GrayLog right now for Syslogs and it is okay. But again this all is all tough with no budget because I am not much of a programmer. Any ideas?
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how do i know the total usage and data flow from switch 3750 cisco????
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Good morning Experts,

Does anyone have any good network topology or network discovery tools or software they can suggest?

Both free versions and paid version suggestions are welcome, as I wouldn't mind finding the best in each category.

Thanks in advance!
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Paessler

211

Solutions

586

Contributors

Paessler AG’s award winning PRTG Network Monitor is a powerful, affordable and easy-to-use Unified Monitoring solution. It is a highly flexible and generic software for monitoring IT infrastructure, already in use at enterprises and organizations of all sizes and industries. Over 150,000 IT administrators in more than 170 countries rely on PRTG and gain peace of mind, confidence and convenience. Founded in 1997 and based in Nuremberg, Germany, Paessler AG remains a privately held company that is recognized as both a member of the Cisco Solution Partner Program and a VMware Technology Alliance Partner.