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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3
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1answer
2k views

Detailed statistics using Ubiquiti UniFi hardware

I'm using UniFi manager to manage 10+ sites with 3-5 hotspots per site, and I look for more detailed statistics that the one offered by UniFi manager, such as: following an user through different ...
2
votes
2answers
33 views

How do APM systems monitor and collect machine interactions?

So I generally understand how things like New Relic instrument a .NET app -- the CLR Profiler API makes perfect sense. But what I can't figure out is how things like AppDynamics understand ...
1
vote
1answer
24 views

How to analyze bytes transferred over a group of servers?

We have around 50 virtual machines. I installed collectd, graphite and grafana and we have some traffic statistics like these: That produces a graph like this: The lines are incoming and outgoing ...
0
votes
0answers
23 views

monitoring if the ip is down (not up)

Is there a monitoring service that can notify if the IP that is normally down becomes reachable? So, the reverse of the usual stuff. I just need to check a few IPs, so bringing up a complete ...
0
votes
2answers
31 views

How to monitor Azure Virtual Machines running linux?

I want to know if there is any azure service or way to monitor Azure Classic Virtual Machines, to see if they are up and running or they are not functioning. Also, It would be beneficial if the ...
0
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0answers
33 views

How reliable is /sys/class/net/eth0/statistics/rx_bytes for bandwidth statistics?

I found this script at https://github.com/Cosmologist/collectd-network-bandwidth-usage. <Plugin exec> Exec user "/tmp/exec-network-bandwidth-usage.sh" "eth0" </Plugin> It runs a ...
0
votes
0answers
29 views

vnstat and dstat report different totals

I'm trying to monitor bandwidth going through one of my interfaces, and I've discovered that dstat and vnstat both seem to report different rates... vnstat: [root@... ~]# vnstat -i eth8 -l ...
-3
votes
2answers
42 views

Simple uptime monitor for small remote network [closed]

Our company has about 15 small stores with two Windows 7 PCs (and two VoIP phones) at each location behind a SonicWall SOHO. We use various business grade cable and fiber ISPs at each location. ...
0
votes
2answers
62 views

Graph zabbix and time navigator have different time periods

why the time zone is different between the server zabbix ubuntu and console of zabbix ? the server time zone is ok (utc) but not right in the console(browser) l tried the command dpk-reconfigure ...
0
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0answers
51 views

How can i add switch in zabbix?

How can I add a host in zabbix ? like switch sf200-24p not support with SNMP. Note: the switch sf200-24 is support with LLDP protocol.
0
votes
1answer
27 views

Determine Which IP address is using the most throughput Juniper SRX 220

We have a Juniper SRX 220 firewall, and our ISP provides a readout of our total throughput for times of the day. There is a throughput spike fairly consistently during certain hours and we are trying ...
8
votes
4answers
728 views

Monitor DELL hardware on VMware ESXi 5.5 server

Despite researching this topic quite a bit online (to be fair I'm not a full time sysadmin) I'm unable to figure this out. We have a bunch of VMWare ESXi 5.5 servers, some of which are integrated ...
1
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0answers
45 views

perl smokeping false packet loss (solved)

I'm getting false packet loss from time to time. The period lasts about month, you can see it on graph. We checked it using the same fping command and got no loss at all. So maybe were are hosts limit ...
2
votes
1answer
1k views

ngrep - possible to hide payloads?

I use ngrep a lot to inspect HTTP headers to see what's going on. I use the -q flag for quiet output, but I really don't want to see the payloads, only the headers. Is there a way to do this? My ...
5
votes
1answer
12k views

HP Procurve 5406ZL - How to enable port-mirroring?

How would you enable port mirroring for a HP Procurve 5406ZL? The configuration guide is not very clear in the mirror-port function. I know that I'll need to use the mirror-port [[ethernet] PORT-NUM]...
0
votes
1answer
67 views

bandwidth monitoring by TCP/UDP port on Cisco 2960 or Linux

We have an international line between two sites with limited bandwidth. I want to monitor bandwidth usage between the two sites, and understand which type of traffic consumes the most. Ideally I ...
0
votes
3answers
83 views

Use Nagios to monitor 2 locations

As I am new to Nagios, I would like to ask if anyone knows how to monitor 2 physical locations using Nagios. So for example, we are having 2 datacenters which are interconnected. I have set-up a ...
1
vote
1answer
71 views

Is it reasonable to use an external website as a health check

I have a 4 proxy servers spread across a couple of datacentres that serve a large number of users on a WAN. These are load balanced using an F5 GTM located at each site. My goal is to write a health ...
34
votes
5answers
55k views

How passively monitor for tcp packet loss? (Linux)

How can I passively monitor the packet loss on TCP connections to/from my machine? Basically, I'd like a tool that sits in the background and watches TCP ack/nak/re-transmits to generate a report on ...
0
votes
1answer
19 views

Reliable UK/EU ICMP Targets for Periodic Routing/Connectivity Tests?

I need to test routing between my United States datacenters and United Kingdom and Mainland Europe ISPs. This is used to distinguish between general transcontinental routing issues and specific ...
2
votes
2answers
91 views

FreeBSD interface up/down monitoring

How to get informed about specific interface status in FreeBSD? ifconfig <ifname> | grep "status: active" works fine but I want to avoid polling and be informed as fast as possible about ...
1
vote
2answers
1k views

Using runit and monit to run / monitor services

I am configuring some services to run on Ubuntu server. I was going through the link below where they use runit to run the services and monit to monitor the services - http://rubyworks.rubyforge....
0
votes
2answers
452 views

Monitorix Graphs Show Boxes Where Text Should Be

I have just installed Monitorix on ArchLinux using the tutorial here: wiki.archlinux.org/index.php/Monitorix I am using the Lighttpd web server. It is working fine and the graphs are being generated,...
0
votes
0answers
23 views

Way to know what source is reading the most from MySQL Server(RDS)?

I have a mysql server which is registering very large bandwidth usage. I want to know what options I have for: Knowing what source is using the MySQL server most. (server ip?) What tables or queries ...
14
votes
6answers
7k views

Solution to route/proxy SNMP Traps (or Netflow, generic UDP, etc) for network monitoring?

I'm implementing a network monitoring solution for a very large network (approximately 5000 network devices). We'd like to have all devices on our network send SNMP traps to a single box (technically ...
4
votes
5answers
7k views

Ping Equivalent For Checking If A Port Is Open

How do I check if a port is consistently alive? For example, I could use ping 192.168.1.1 -t > results.txt This will ping 192.168.1.1 continuously so that I could monitor it. Is there an ...
0
votes
1answer
20 views

How to implement PushMon on Ruby site

I am looking to implement PushMon on a number of sites using Ruby Padrino. I have the following piece of code from the PushMon site. Where would I place said code. I was thinking of adding it to the ...
5
votes
1answer
4k views

Full status information in Nagios email notification?

I have set up Nagios to monitor my servers and I have written a few custion checks. When I get a notification email, I only get the first line of the status information and I have to use the web ...
1
vote
3answers
478 views

How to monitor network usage per user in Linux? [duplicate]

I am administrator of an openSUSE linux server which is used by many people in our company. Today we find out that yesterday one of the users use too much of bandwidth and its important for ...
1
vote
1answer
683 views

How to monitor network activity in openwrt

I'm having what feels like slow internet from time to time, with ping to google.com at 3000ms and up or even timeouts, and I'd like to check if the problem comes from the ISP or if it's from my ...
1
vote
1answer
124 views

On-the-fly decoding HTTP bodies on Linux?

My wish is to monitor HTTP exchanges between my server and a browser. At present time, I use the localhost because I'm developping the app. I installed and used tcpflow and found it quite useful but ...
0
votes
1answer
30 views

Are There any Web-Based Load-Balancing Managers? [closed]

I've setup load-balancing and clustering on a few linux systems for serving web and database content, and each time it's a fairly laborious process. So I'm wondering, are there any web-based managers,...
0
votes
1answer
50 views

How to add drive space alert on IP monitor?

I am the administrator on a Windows server(GSNAPRINT) installed with IPmonitor tool. I want to add an drive space alert for another server (GSCTTLBACKUP) but was not successful. But there were other ...
0
votes
0answers
63 views

Monitor network using bandwidthd without dedicated machine

I'm setting up bandwidthd in order to be able to monitor who's eating our monthly cap. Here's my bandwidthd.conf without the comments: subnet 192.168.1.0/24 dev "wlan0" promiscuous true ...
14
votes
5answers
27k views

Is there a way to get wireshark to capture packets sent from/to localhost on Windows?

Is there a way to get wireshark to capture packets sent from/to localhost? When I monitor traffic going from my computer to another, or from another computer to my computer, then it works. But ...
0
votes
2answers
514 views

How to log all inbound connections on Windows server

I need to log a summary of all inbound TCP connections on a Windows 2008R2 server, but only including the Source IP, Source Port, Destination IP and Destination Port. I do not want to log the payload ...
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votes
3answers
177 views

Is there a GUI tool to log and view outgoing CURL requests from a Linux server? [duplicate]

I've seen several similar questions - but none that truly answer the question. So here goes: PROBLEM: A script is being run on one of our servers that is making outgoing post (and other) requests ...
1
vote
1answer
86 views

How to set up an end-to-end SNMP data collection system to cloud?

Aim: We are creating a cloud server which will collect diagnostic data (like bytes exchanged, SNR) from remote SNMP enabled network devices (like Routers, Switches). The SNMP devices may be located ...
12
votes
5answers
12k views

On Linux, how can I tell which process is sending Ethernet packets?

I'm running gkrellm which shows that some process on my Debian Linux system is writing approx 500KB/s to eth0. I'd like to find out which process it is. I know a little bit about netstat, but it ...
2
votes
0answers
57 views

Network sensor for a TCP connection for collecting statistics each second [closed]

I need a Network Sensor capable to gather basic end-to-end statistics (packet loss, jitter and network delay/RTT) of several TCP connections directed to the very same destination (ip-addr:port) on ...
19
votes
4answers
56k views

How can I filter https when monitoring traffic with Wireshark?

I want to observe the HTTPs protocol. How can I use a Wireshark filter to do that?
1
vote
2answers
4k views

Icinga 2 vs Nagios 4 vs Shinken 2 : is there Performance Benchmarking comparison available?

I am not able to find out any link that displays the benchmarking report for the cores. We have to monitor 50,000 hosts and 30 services per host per minute host check : icmp per 5 minute service ...
2
votes
1answer
463 views

Monitor network statistics with vnstat on CoreOS?

I notice that vnstat isn't installed on CoreOS. Is there a comparable way to monitor network usage on a CoreOS cluster? Certainly one could run vnstat through a Docker container but I assume that ...
5
votes
5answers
15k views

How to capture Wireshark packets when using a switched network in Windows

I’ve been asked by our SIP trunk provider to run a Wireshark trace on the network when we receive calls. The issue I’m having is that if I run Wireshark from a laptop plugged into the main switch I ...
5
votes
3answers
1k views

Network Sniffing and Hubs

This will likely seem naive to the experts... but it has been on my mind lately. For years I've been using ntop and a cheap 4 port hub to sniff client networks to determine who's doing what -- and ...
1
vote
1answer
106 views

Automatic Node Categorization not working in OpenNMS

I setup a Node Categorization policy in the foreign source definition ; its not working correctly what changes need to be done? Text version: (for bot/crawler) name SetNodeRouter class org....
0
votes
0answers
856 views

Zabbix active check traffic

My conundrum is as follows... I have a Zabbix (2.2) server and agent up and running. The server does all kinds of passive check on the agent -- everything here is working as intended. The problem is ...
1
vote
2answers
223 views

Count number of DNS (bind9) clients?

I need to know the number of my DNS server clients. Probably it means unique IP's per day, or something, because i think there is no other way to identify clients in other way. So, i need to know how ...
1
vote
1answer
622 views

Implementing Argus (similar to netflow) what kind of information should I be gathering?

I am setting up a trial of Argus at my company as a diagnostic tool. We have a collector box attached to a monitoring port on our switch, and the initial plan is to redirect ports with unusual traffic ...
0
votes
0answers
66 views

iptables command to get bytes used by specific ip on port 443

I have hosted a WiFi network and i need to monitor data usage by every IP address on port 443(https) Here is the iptables rule used to share INTERNET from eth0 to wlan0 sudo iptables -t nat -A ...