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Questions tagged [network-monitoring]

Describes the use of a system that constantly monitors a computer network for slow or failing components and that notifies the network administrator (via email, SMS or other alarms) in case of outages.

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DNS Monitoring Tool Bind9 or Powerdns Monitoring Tool (Open Source) [closed]

Hello guys hope you all fine kindly suggest me any good monitoring tool for DNS monitoring, Tool should monitor Query per second, Query types, query fail, drops, and other important things related to ...
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1 answer
22 views

Network Monitoring on Linux (RHEL/CentOS)

I am trying to monitor outgoing network traffic on a Virtual Machine running CentOS (Guest) on a Windows Machine (Host). I installed Fiddler on the Host Machine (Windows) and allowed remote ...
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How to configure NDRP clients on Nagios Core Server

Good day all. I am new to nagios core and I have spend a number of days trying to configure a Nagios Core Server lying in a public subnet to receive passive checks from VMs in a private subnet with a ...
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37 views

PRTG shows error regarding WSUS, i can't seem to find the reason

We are using PRTG to monitor our network, and recently the WSUS probe on one of our servers started displaying an error saying "File C:\Program Files\Update Services\Api\Microsoft.Update....
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1 answer
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Huawei S5600 main OIDs?

I'm working with NagiosCore to check the stats of my network's switchs (mainly S5700 (modulars and non-modulars) and S5600). Using SNMP (v2c) I'm able to get stuff defined by myself such as: ...
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281 views

tcpdump: filtering out localhost, packets show up anyway?

I'm trying to use tcpdump to explore what on my computer talks with whom on the world wide web. I've came this far as of yet: lan_hosts="(hosts || to || exclude)" local_hosts="(127.0.0....
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1 vote
0 answers
69 views

How can I check if my wcf service is using NTLM or Kerberos?

My WCF service is hosted in IIS and communicates with it's clients via TCP (net.tcp binding), not http. I'm using Microsoft Network Monitor to monitor traffic on the server. I see the Protocol Name is ...
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1k views

IDS/IPS on Ubiquiti EdgeRouter

I have changed my network setup from the default ISP device to an Ubiquiti EdgeRouter (ER-X-SFP) a while ago. Currently I’m planing to switch to an static IPv4 address. From the ISP I would also get ...
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0 answers
37 views

How to monitor the bandwidth with detailed files transfer information?

How can I know which file is transferring from instance to public internet? Is there any monitoring tools? When I am using bandwidth monitoring tool I have got whole output and input usage info but I ...
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0 votes
1 answer
35 views

Monitoring the OnPremise network appliances from Azure?

People, I have the need to monitor the OnPremise Network appliances (Gateways, Firewalls and other services IP addresses) from Azure, then send an email alert or trigger alert via PagerDuty. https://...
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0 votes
1 answer
46 views

realtime monitoring of linux server network

We have a few Linux server which act as Edge network, We want realtime (or near-realtime) information on network bandwidth, top IP addresses and network bandwidth per them and other network parameters ...
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1 answer
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Track Bandwidth on shared interface

On our servers running FreeBSD, we've allocated multiple public ip addresses to host different clients on single eth0 interface. The purpose of allocating separate ip to each client is to distinguish ...
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1 answer
411 views

PHP script to calculate bandwidth per directory on a server?

I am tasked with figuring out the bandwidth used per directory on a parent directory in a linux server. We are hosting 10+ different client sites in 10+ different directories, and want to figure out ...
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0 votes
2 answers
43 views

Remote network monitoring when all comms fail

We had a circuit trip last night (Sunday evening 22:00) which killed all external COMMs ... so the alerting on our servers, inside the building, could not communicate out. Is there a solution to this? ...
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1 vote
1 answer
5k views

Is there a way to listen to all traffic on my router, using e.g. Wireshark or tcpdump?

I have a crazy stupid problem driving me to an early grave and I'm trying to trouble shoot what the problem is. Is there a way to listen to all traffic going through my router, including dropped SYN ...
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1 answer
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Tips for working with very large pcaps?

What is the best approach for working with very large collections of network traffic (500GB+)? Specifically, I'd like to be able to filter packets which match various payload and protocol criteria (...
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1 vote
1 answer
173 views

Windows Server Login Monitoring Powershell

I've written a basic script for PowerShell to Monitor Event 4771, I have the problem that it still shows RDS-Broker which doesn't tell anything - I want to filter it out and only send the real users ...
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2 votes
0 answers
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Why does my router go down every ~16 hours and how can I debug it further?

I have a router that is connected to a larger managed network (such as a university campus network). The router is configured with a static WAN IP address and provides NAT and DHCP to the LAN. After ...
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  • 121
2 votes
1 answer
367 views

Does AWS GuardDuty monitor traffic through an ELB?

I've been trying to find a definitive answer to this question for a while. I would expect the answer to be "yes" but it does not align with what I see in practice. From the docs GuardDuty "identifies ...
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1 vote
0 answers
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Does in-the-field experience suggest that a HTTP POST is more reliable than PUT and DELETE

I need to cross reference my experience with that of professionals, as I'm developing a REST application that can either Use on HTTP POST for all delete and create operations Or use HTTP DELETE and ...
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2 votes
0 answers
106 views

Continously monitor network consumption of per process on Linux [closed]

I have a server running Debian Stretch with a lot of running services and from the hoster's monitoring I can see some pretty hefty traffic spikes every now and then (not regular). As this could be ...
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1 vote
1 answer
140 views

Monitor outbound connections

How I can monitor outbound connection that are made from my server along with the program/application which has made the connection request? I have tried using the below command and I am not much ...
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4 votes
1 answer
1k views

how to monitor windows vpn connectivity?

I have set up Windows 10 built-in VPN for the use of one program and I have sense that this connectivity is bad. Generally my Windows machine has very reliable network connection but connectivity in ...
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0 answers
849 views

On machine reboot via SNMP

Is it possible to reboot a windows or a linux machine via SNMP? Most of information I've found is related to the reload of the SNMP service itself, instead of host reboot.
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1 vote
0 answers
143 views

Sending ARP requests with SmokePing

I have been using SmokePing to monitor my local network for some time now and I'm happy with its graphs and email alerts. I use the fping probe and it works as expected. I found however that, every ...
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1 vote
0 answers
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Monitor outgoing network usage per HTTP request

In Apache prefork server running PHP application on Linux, each HTTP request might fetch some data from other server, for instance Memcached. Let's say we want to find out top 10 HTTP requests (ex. ...
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2 votes
2 answers
9k views

How to reset the admin password for Observium

How can i reset the password for the user admin with MySQL or a Observium script. MariaDB [observium]> select * from users; +---------+----------+------------------------------------+----------+---...
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1 answer
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no active checks on server [xx.xxx.xx.xx:10051]: host [host] not monitored

I am using Zabbix Active Agent to monitor hosts over the network but getting "no active checks on server [xx.xxx.xx.xx:10051]: host [host1] not monitored." errors only in one host with same exact ...
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1 answer
6k views

Zabbix disk space monitoring using active agent in linux server

Zabbix server is giving same value for all linux servers upon disk space monitoring using Zabbix Active Agents. I am using Zabbix server 3.2. Please help.
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2 votes
1 answer
2k views

How can I enable WinHTTP trace logging in Server 2012 R2 for viewing raw HTTP commands and application details?

I have an application running on a Windows Server 2012 R2 system and the app leverages winHTTP for various network requests. It's not able to communicate with another server on the network and I ...
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1 vote
3 answers
8k views

"Couldn't resolve host name: Could not resolve host:" in Zabbix

Getting "Couldn't resolve host name: Could not resolve host: example.zabbixagent.com; Name or service not known" in Zabbix server although DNS and hostname of Zabbix Active Agent is correct. Is this a ...
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0 votes
1 answer
1k views

Send notification upon Zabbix active agent shut down

I have configured zabbix server with zabbix active agents but I am not able to get notifications when zabbix active agents shut down. I have no issue getting email notifications when active agents ...
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2 votes
1 answer
748 views

Log and monitor network usage by session/connection

In Resource Monitor, Network tab, in the Network Activity section, I can see each active session and how much bandwidth it is using. I'd like to capture that information over a period of time, is ...
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3 answers
1k views

One-way traffic with port mirror HP-2610 to Hyper-V

I have a Hyper-V box that has call recording for IP phones with the following connectivity: PBX on an access port (native vlan 42), plugs to port 22 on switch (it has no settings for VLANs, so we set ...
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-3 votes
1 answer
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which monitoring tool is good for monitoring system hardware,software,user management and network activity for all kind of operating system? [closed]

Please kindly suggest me the tool for monitoring the system hardware, software, applications, services, user management and network related activities of IT Infrastructure.
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0 votes
1 answer
1k views

Windows Server 2012: easiest way to monitor ports for error 4625 NTLM attacks

I'm getting thousands of hack attacks on a Windows server resulting in Security log error 4625 entries. Hackers are using random IPs, so the usual RDPguard, Syspeace, etc. tools don't work. Port 3389 ...
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1 vote
0 answers
2k views

PRTG - Windows IIS Application sensor fault

I have two sensors that are giving me the same alarm. WMI: No result set (code: PE016) -- PerfCounter: No data to return. (Performance Counter error 0x800007D5) I can't for the life of me ...
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1 answer
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Nagios Core - Automation

We are using Nagios Core for monitoring devices and we are currently facing some hurdles with monitoring a large scale environment. It requires a lot of manual tasks such as collecting OID's and MIB's,...
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1 vote
1 answer
31 views

Determine network usage of a known process without root/elevation

My application is starting another process, and I'd like to keep track of how much data that new process has read/written from/to network sockets. I've found tools like nethogs, but they require ...
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0 votes
1 answer
1k views

Use iptables chain to monitor traffic

We have a linux box in use as a router, with various rules (ip, tcp port, udp port, etc.) in the iptables FORWARD chain, which might be added to or removed from at any time. I need to monitor ...
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1 answer
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How do I set OpenNMS to have two types of Node Down events with different severities?

For example, I have laptops in one subnet which keep turning on and off so if a node on that subnet went down I'd class that as an intermediate incident. However, on another subnet there are critical ...
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-1 votes
1 answer
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How to collect I/O Bandwidth statistics on ubuntu 14. [closed]

I want to write script/service to collect I/O bandwidth consumption on daily basis. I know nload tool which will show total I/O data transfer from the time we executed the command. I want script to ...
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2 votes
1 answer
4k views

How can NETSH be used to sniff and collate network traffic?

I am trying to capture all network traffic and view it in a human-readable way. To begin packet capture with netsh, I am running the following command. netsh trace start scenario=NetConnection ...
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0 answers
53 views

How to securely gather multiple servers data for monitoring

I got an 'admin' server where all admin GUI can be accessed. I also have 2 other servers, 1 web and 1 db. As I expand for a nodejs server/api, I was wondering how could I transfer servers information ...
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1 vote
0 answers
224 views

Link-layer scan in Linux

Short version: How can I determine what IP addresses are present on an Ethernet network without assuming they are all on the same subnet? Long version: I've got a device on a network I can SSH into ...
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0 votes
2 answers
208 views

Cisco C3750, detect high traffic

I would like to know what are the interfaces that produce more traffic in my switch. How can I do that?
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  • 123
0 votes
1 answer
2k views

Proxmox Virtual Machine Bandwidth monitoring

I have been trying to find some tool to allow me to monitor and get stats from virtual machine network usage. I have a proxmox host with several virtual machines, and I would like to have some sort ...
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3 votes
2 answers
2k views

Monitor DNS queries of all hosts in LAN?

We have a simple setup: Some workstations (Mac and Linux) and a gateway router. For statistics and security purposes I want to watch all DNS queries done in our intranet. Unfortunately the gateway ...
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1 vote
0 answers
119 views

Rsync cron works but monit cron doesn't

I run a 14.04 Ubuntu server. I'd like to automatically receive Monit email alerts. Typing /usr/bin/monitcron.sh as root all works fine manually. I tried cron with Rsync as a test. Cron works great. ...
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0 votes
2 answers
308 views

bidirectional Bandwidth measurement snmp with remote office

Hello I have a dedicated system for monitoring connected to the network in all remote offices. Our main/nagios server have connection to all. I want to get the bidirectional Bandwidth measurement ...
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