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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147 views

Icinga Monitor Website for String

I am trying to use Icinga to monitor a website for a particular string. When I run the plugin from the command line, it seems to work fine, but in Icinga-Web, it always shows up as successful no ...
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2answers
517 views

Is My Website Under DDOS Attack? [closed]

Recently I noticed that the CPU load of my server is increasing rapidly. In any day, the CPU load does not reach 2.5. I have the following server: Intel® Xeon® E3-1270 v2 Single Processor - Quad Core ...
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1answer
176 views

monitor vps bandwidth usage

I have a vps guest whose ip is 192.168.1.20. I add the following lines to iptables, # iptables -A FORWARD -o eth0 -s 192.168.1.20 # iptables -A FORWARD -i eth0 -d 192.168.1.20 Then I run this line ...
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3answers
321 views

Getting alerts from remote Icinga/Nagios instance

I have an Icinga server (which is basically a fork of Nagios) at one of my clients' sites. I access the server via ssh and don't have access to other ports. Since there are a couple of things that ...
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1answer
337 views

Enabling TCP md5 signature option in centOS?

I'm trying to enable md5 checksum/signature for tcp packets in centOS (the main use case to stop tcp RST attacks, etc). It seems like I may be able to do this for individual ports using netcat or via ...
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2answers
886 views

Wireshark does not capture HTTP on 8080

I am running Wireshark on my linux machine and i have simple python web server running on localhost:8080 I am capturing only local port 8080. When i open browser on localhost:8080 wireshark captures ...
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88 views

Monitoring bandwidth on multiple hosts with no control of a router

I'm looking for ways to monitor bandwidth usage for some Linux servers (and a couple of Mac/Windows servers, but if I can only do the Linux servers that will be OK). I do not control the router that ...
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2answers
123 views

Log incoming and outgoing connections on my Leased Line

I am a System Administrator at a college where we have a leased line internet connectivity and 32 Static IPs. The Local; network is running behind the Juniper Firewall. Now I would like to log all the ...
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1answer
87 views

Hyper-V Client Network Dropouts

Bit of a strange one I'm having that I can't work out. The setup: Asus P8Z77-M Pro motherboard, 16GB RAM, Intel i7-3770 CPU, OCZ SSD, NVIDIA Quadro 2000 grpahics card (with RemoteFX on the client); ...
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2answers
265 views

monitor traffic using port mirroring and wireshark

We have an edge router connecting the Internet and our internal network. I needed to monitor the traffic going in and out, and make a report about which server/host uses most of our bandwidth and ...
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152 views

Multiple connections using multiple IP addresses to same PC

Background: I have a network management application (like Nagios or OpenNMS but not either one) under testing that requires all managed devices to have individual IP addresses ie. SNMP traps received ...
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2answers
283 views

monitor bandwidth usage per application or IP

i want to monitor the bandwidth usage per application or per IP, currently im using wireshark to do the work, but are there any software dedicated just for this type of job? thanks
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78 views

How can I set ntop not to shorten host names?

With most screens in ntop, there is a list of hosts. Unfortunately, in almost every one, the host name is shorted, for some reason. When the host names follow the company standard, this results in the ...
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1answer
139 views

Programmatically interfacing with Managed switches (Cisco 3750)?

I work at an organisation that has a few thousand computers and around 100 switches. To help with the stock take for the computers I would like to programmatically access the managed switches to find ...
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2answers
202 views

log server setup and testing, with log manager opensource

I've been trying to get a new, centralized, log-server up and running for some testing and have run into some problems. First part is that I've installed Kibana but can't get anything indexed, tried ...
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2answers
147 views

How can I scan using nmap and Zenmap all hostnames that begin with a particular string?

I have a number of nodes on a couple of networks whose hostnames all start with org. Some examples are: orgwebsvr1 orgwebsvr2 orgwebsvr3 orgdbsvrmysql orgdbsvrmssql orgdbsvrosql With nmap, I know ...
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1answer
122 views

Tool to automatic suspending the DDOSed website before the whole VPS is being suspended by Data center [duplicate]

I have a non-Xen VPS (don't exactly know what the software is). The past week, we had experienced several DDOS attacks on one (or some) of the hosts and because of using more than usual bandwidth, ...
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3answers
199 views

Netflow/IPfix Analyzer for network threats and anomalies

I'm evaluating various options for Netflow/IPfix based analyzers which focus on identifying security threats and anomalies. It would be highly appreciated if someone can provide a list of tools with ...
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1answer
64 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? Please do let me know if something wrong with the config and any ...
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2answers
160 views

What to use to get meaningful network statistics

A customer has a rack with some 1U servers and Dell™ PowerConnect™ 2716 switch at ISP's server room. One port is uplink to the ISP. Some servers run ESX5 while one 1U server is a plain Windows 2008 R2 ...
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1answer
73 views

How can I get the total “INTERNET” usage (in MB) using Microsoft Netmonitor or any other tool

I tried with Microsoft Netmonitor, but I don't know which column has to be added to get the Total usage (in MB). I also want to know about what filter have to be applied to get only the INTERNET ...
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2answers
729 views

Monitor Internet bandwidth by IP in a LAN environment?

I am new to networking so pardon if this is a stupid question. I want to see how my users use the internet bandwidth. I have around 50 Users in the network and I am using a checkpoint edge series ...
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2answers
79 views

Alert when a file/directory upload has failed

I am using Ubuntu and needed to know if there is any way to produce an alert when a File copy/upload operation has failed. The scenario is as such: I have file xxxxx on my computer/server. However, ...
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1answer
49 views

Tracking data sent to remote host over time?

What is a a good way to track over time the amount of data transferred from my Linux server to another host on the internet? https and imaps only
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1answer
414 views

Netflow to syslog converter

Is there any way to have netflow v9 converted to syslog? Which would be the best way to have the following idea working? Procedure: 1) The router sends UDP with the following structure: ...
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1answer
186 views

tell tcpdump to not include the port numbers in the output

how can tell tcpdump to not include the port numbers in the output? Right now it includes the resolved IP + resolved port. I just need the resolved IP address (hostnames)
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1answer
645 views

haproxy status reporting

I've just started using haproxy, so excuse me if I sound silly. haproxy itsekf is working fine and this is the config file that's in use: # This file managed by Puppet global chroot ...
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2answers
169 views

Is there any software to monitor bandwidth?

In our organization we have 3 servers that are located at the office and around 20 pc accessing the servers in the warehouse with distance between the pc and the server around 20 km (13 miles). Our ...
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1answer
100 views

How do I get the network usage of a server per-IP?

I'd like to know a tool to programmatically measure, in KB/s, the load that each IP applies to a server. So far, tcpdump does a good job at telling me the amount of packets sent per second, but I ...
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1answer
67 views

What are some simple ways to capture network failures/drops to requests sent to a sql server?

What are some simple ways to capture network failures/drops to requests sent to a sql server? SQL Server comes with a Profiler tool, but doesnt seem to log dropped requests, instead only successful ...
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1answer
77 views

Solarwinds migration

I want to migrate my solarwinds to a new VM ware. Currently my solarwinds is installed in a Windows Desktop with the database stored locally in it. During migration to a VM ware, I want to point the ...
2
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4answers
244 views

an unknown ip on network

In our office we have many PCs, all of them have static IP addresses. We had a problem with one server with ip 192.168.1.10 dropping off the network occasionally. I unplugged the network cable from ...
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2answers
273 views

nmap scan only state of port

Is it possible with nmap to check only the state of a port whether- open, closed or filtered and NOT the services behind it? The aim is to speed up scan results. Since UDP scan is also involved it is ...
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1answer
211 views

How to have PRTG Server running beside Apache?

We used to work with a local Apache instance (WAMP) as a development environment, but we installed recently a PRTG server on the same machine, so it listens to the same port, as it is a web-based ...
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1answer
140 views

How to prevent particular program from using particular network connection under Windows?

In my company almost every user has 3G mobile connection and many of them travel a lot. To prevent expensive mobile charges I'm looking for a solution that would prevent particular program (Windows ...
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1answer
224 views

monitoring rx/tx stats of current connections on Linux

In a Linux netfilter router, connections table only includes information on end of connections. Where I reach real time rx/tx information for each connection? (In freebsd, session table already ...
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1answer
379 views

How to diagnose intermittent connectivity issues

At work we are suffering some intermittent faults with the internet. This manifests itself as none of our desktop computers being able to make any requests externally including to ip addresses for a ...
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0answers
379 views

Squid 3 monitoring tool

Have a Squid 3 proxy setup with a Round Robin load balancing. When running for a couple of day's it will get unstable and need's to be restarted. I wan't to solve this and be able to monitor where ...
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1answer
158 views

Smokeping FTPtransfer probe

I'm trying to set up a SmokePing FTPtransfer graph but with no luck. I have the ping graphs all figured out but the FTP graph is just empty. Here is my Probes config: *** Probes *** + FPing binary ...
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1answer
112 views

Vlan and Switch setting - dummy [closed]

I need to speak tomorrow the network engineer and I would like to understand his so apologise for the Dummy question: In the school we have a cab with a 24 port Netgear manageable switch with an ...
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1answer
117 views

Linux measure network bandwith

I have a one way connection between 2 computers (both Ubuntu). I am looking for an easy way to find the max bandwith. I need to find the max transfer rate between computer A and computer B without ...
2
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2answers
102 views

how to track which switches, routers are being affected by ddos

I have an enterprise network system which has a router facing the internet, beneath it a virtual chassis switch, below it an access layer switch and finally a server. My question is that when there is ...
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2answers
168 views

How to monitor how much data transfers between Exchange servers in DAG?

I recently installed a second Exchange Server (standard, 2010) to our organization as part of a Disaster Recovery solution. The two servers will soon be part of a DAG. Before placing the server at ...
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1answer
301 views

What options do I have for monitoring internet usage by user and sites [closed]

I want to set up a linux server (ubuntu server 12.04) on my home network to monitor the internet usage and find out the users and websites that use the most bandwidth. I have looked at squid and it ...
0
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1answer
236 views

How to know why server traffic is used and what is using it? (windows os)

I have a VPS on which I have Windows Server 2008 R2 installed. My monthly traffic is near 100 Gigabytes per month, and I don't have heavy sites on it (no download center, no movies, just text and ...
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2answers
285 views

Tool to analyze the real time traffic in Windows XP SP2 [closed]

My client machine/(s) is/(are) Windows XP SP2. I can’t effort every time to have physical access to my server machine. To analyze the real time traffic and bandwidth between client and server machine, ...
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1answer
203 views

What is the best way/tool to analyze raw data(network stats) from Simulation?

After running a simulation(using a simulator(QualNet)) of a simulated network I end up with ip stats stored in a database, I then extract the data to a csv file So now I have 750mb of raw network ...
2
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1answer
799 views

Windows server sending constant ARP requests to offline devices

We have a Windows 2003r2 server which is sending intermittent ARP requests to several devices which are no longer on the network. The result of this is disruption to a PLC which is running over ...
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1answer
512 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 - ...
3
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4answers
242 views

Creating an office network and monitoring all activity without a proxy

We are setting up our office network and would like to track all the websites visited by our employees. However, we would not like to use any proxy based solutions. Our work is highly dependent on ...