Tagged Questions

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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0
votes
0answers
17 views

iptables on AWS - how to get traffic mirroring to work?

Has anyone successfully deployed 'iptables -t mangle -j TEE...' for monitoring traffic on AWS instances? If so, how? My objective is for client<->server traffic between external customers and EC2 ...
0
votes
0answers
19 views

Trace IP traffic to physical machine under Linux

In my firewall logs I recently see frequent connection attempts from a 10.0.0.0/8 network. This network is used by VirtualBox, but I can exclude that these packets come from those. No physical machine ...
0
votes
2answers
64 views

Monitor server / website load of bandwith

I've been doing a lot of searching around for a tool to monitor a website's "bandwidth" usage, and I'm not talking about how many MB/data is being loaded but the servers actual output speed, to ...
-1
votes
0answers
19 views

Ntop network usage alert

Is there a possibility to send email (or other) notification when used bandwidth exceeds certain treshold when monitoring with ntop? I haven't found any way to achieve this in the config.
0
votes
1answer
41 views

Monitoring “external” worm activity remotely

Some of our computers in our company has been infected with the worm Conficker. We don't know the source of the infection, but I want to monitoring the outside activity to see if we are still infected ...
0
votes
0answers
22 views

does intrussions cause huge network traffic

I've noticed many times with different cloud providers rackspase and windows azure a huge sudden spike in outgoing traffic 200 GB - 600 GB within 1-4 days !! knowing those machines draining network ...
0
votes
1answer
30 views

nmap repeats the scan to a specific port multiple time

I scanned a subnet (16 hosts) while dumping the network traffic with wireshark. I did it 2 times and I noticed that in the traffic there is the normal SYN-SYN/ACK and SYN-RST from open/closed port, ...
0
votes
0answers
59 views

Randomly lose the connection to router

I have been suffering with in this problem for a really long time and I'm running out of ideas. We have VMWare (Intel model server, Intel storage - Windows storage op. system, ). In the virtual ...
0
votes
1answer
52 views

How to monitor socket connection usage and exhaustion on a server?

I have a service endpoint (java) that will be getting bursts of thousands of requests per second. In my load testing I had to tweak the server because I would run out of open sockets as there were ...
0
votes
1answer
45 views

Show units when doing dstat -n

Question is simple as, when i do dstat -n i get what I assume to be a unit in bytes? But i would like a way to force the units into Mb/s or for it to simply tell me the unit it is displaying. Is there ...
0
votes
1answer
47 views

How to monitor if someone is using wireshark in my corporate network

I would like to know if it's possible to monitor if any users are using a network sniffer like Wireshark in my corporate network?.
0
votes
1answer
36 views

Measuring HTTP traffic basic on URIs and custom headers

I'm currently working on an API service and one of the requirements is that we measure the amount of data used by each user of the system, and track how many times they use the API. So bandwidth usage ...
0
votes
0answers
86 views

Downloads of large files fail without an error

We run professional websites on IIS 6 and have complaints of (and have verified) that downloads (via HTTP) from remote locations (e.g. Australia) are incomplete or truncated. This means the download ...
1
vote
3answers
71 views

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 management ...
0
votes
2answers
25 views

OpenNMS installation failure

I am willing to use OpenNMS to monitor my network. Monitoring it fully from the router to the nodes from a computer will be connecting the network as node not as administrator and that computer using ...
1
vote
1answer
75 views

Resetting to factory default on a Gigamon GigaVUE-212

I purchased the above-mentioned GigaVUE-212 for my test lab from eBay, to determine if I want to use them in production. However, the thing doesn't respond to the default passwords, and I can't ...
-1
votes
1answer
51 views

how to log bandwidth usage on windows 8 [closed]

My Father has a Verizon jet pack (hotspot card). He is seeing 100+ MB spikes on the Verizon data usage report a few times a day. On July 4th the verizon data usage report online shows 6 GB were ...
-3
votes
1answer
52 views

Keeping your server safe [closed]

I have a typical vps server with some custom sites on it running on port 80, a mail server, I don't have a DNS server and it is a default ubuntu 12.04. I don't have any admin panel, I am doing all the ...
-4
votes
1answer
88 views

service to check if exchange is sending receiving email? [closed]

I need of a web service that check if my exchange is sending receiving email properly. And if there are some problem it sends a sms to my cellular. I don't want an app because I have not a smartphone. ...
1
vote
1answer
65 views

Email administrator when a duplicate IP is found on the network

It was suggested that I ask this question on serverfault. I know this is a bit of a custom requirement but I was hoping someone currently has (or can put together) a script that checks for duplicate ...
1
vote
0answers
39 views

NagiosXI- Configuration verification failed

I am using check_ping command to check connection statistics of remote host. When I run the above command on command line, it gives me proper output, shown below: Syntax: ...
-1
votes
1answer
124 views

Nagios Alerts / Notifications - SMS

Configured Nagios core 4.0 and NDOutil 2.0 both are working in ubuntu. Now i am looking for alert types in Nagios. And i am confused in plug-ins and Add-ons in nagios. Especially i am looking in ...
1
vote
0answers
54 views

configure frag3 in SNORT

i m trying to test IDS systems on evasion. I have picked up Snort IDS. I have crafted few fragmented packet scenario, and i m sending those fragmented packet to destination address. All these crafted ...
0
votes
1answer
53 views

Reading .pcap files by CISCO ASA5515-X

I have .pcap file that already includes thousands of packets. I want to analyze these packets via CISCO ASA5515-X to observe how much of them are possible to be an attack packet (malicious). However, ...
0
votes
1answer
89 views

Bind Requested DNS Server IP Log

I have a DNS Server which runs on a virtual linux box with several IPs. Bind provides some pretty detailed debug logs, however, one piece of information that doesn't seem to be logged is the requested ...
0
votes
2answers
951 views

How Fortigate 100D send log to Splunk

I have a Fortigate 100D with FortiOS 5.06 , this is my setting config log syslogd setting set status enable set server “192.168.7.4″ set reliable disable set port 515 set csv disable set facility ...
0
votes
0answers
157 views

Exporting SNMP OID values from wireshark capture?

I am trying to figure out how I can export the SNMP OID values that wireshark picked up. My issue is that when I export the raw data it is all together and not seperated. All I want to to is get only ...
-2
votes
1answer
116 views

How can i send daily alerts for linux server monitoring using Monit tool(free edition)? [closed]

Hi i am using monit free edition tool to monitor server status, but in that the alerts works only when some triggering action done. But i want to send a daily alert of all the details of server as ...
0
votes
0answers
53 views

Hadoop - On the Wire Performance Monitoring?

I have been tasked with implementing an 'on the wire' monitoring solution for a large Hadoop installation. The source of data will be a combination of taps and SPANs throughout the environment. My ...
0
votes
2answers
110 views

How to troubleshoot network from customers perspective?

We have a web application that we host that is customized for multiple customers. Each customer accesses their version of the site via their own custom subdomain. We are running into an issue where ...
-1
votes
1answer
67 views

How to measure network service quality? [closed]

How can I say if my network as a quality service? According to wikipedia (http://en.wikipedia.org/wiki/Quality_of_service ), an example on how to measure the service quality is high bit rate, low ...
0
votes
2answers
41 views

Suspect UDP traffic on lo interface

I'm monitoring the lo interface with iptraf and am getting a lot of movement in the following form: UDP (268 bytes) from 127.0.0.1:49254 to 127.0.0.1:49254 on lo This message appears on average ...
-1
votes
1answer
165 views

Using a single APC UPS via network switch to gracefully shutdown many servers

Here is my situation. I have 10 Dell servers in my rack with 8 1500VA battery backups. I would like to take 1 of those battery backups and connect it to my network switch and use a software solution ...
-1
votes
2answers
368 views

Simplest way to monitor and log the internet traffic of a ubuntu server [closed]

I'd like to know if there is a simple program for ubuntu server (preferably 12.04), without too much configuration, which will allow me to check what processes are using internet bandwidth, how much ...
1
vote
1answer
1k views

Can Observium analyze network traffic?

I'm running a observium server analyzing my office devices, but I'd like to know if there's a way for observium to analyze the network traffic. English is not my main language, so I don't know how to ...
-4
votes
1answer
46 views

Is there a way to display my router's bandwidth usage graph on a web page? [closed]

My router has bandwidth graphs that update once per second. I am building a status screen (as a web page) to be displayed on a TV in our tech department, and I'd like to embed the graph so we can ...
-2
votes
1answer
274 views

Layer 2 and 3 Network and Topology discovery of blackbox network [closed]

I have been given a company network to perform layer 2 and layer 3 network discovery. I have to find out the network topology and infomation about network equipments including switch, router, server, ...
6
votes
5answers
1k views

Nagios server best practices?

I run a medium-sized Nagios server. It monitors roughly 40 servers with 180 services currently and is only growing by the day. I migrated from an old Nagios setup that was configured in a very ...
-6
votes
1answer
172 views

How to monitor all network traffic [closed]

I have installled wireshark on my server but can only monitor traffic through the local nic but all network traffic does not go through the server. I would like to monitor all network traffic. Are ...
2
votes
1answer
534 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 ...
0
votes
1answer
496 views

Nagios mysql check service definition configuration?

I'm using the Consol Labs MySQL Health Check plugin to monitor my MySQL database. I'd like to change the warning and critical thresholds for the threads connected parameter, but have forgotten how. ...
2
votes
1answer
305 views

Monitoring IPv4 vs IPv6 Traffic

We have a fully functional dual-stack network running in our business. Has anyone found a simple tool for monitoring IPv4 vs IPv6 traffic ratios on a given host? When I say "simple" I'm thinking a ...
0
votes
0answers
149 views

Zabbix aggregate checks shows wrong statistics

Please, help with a Zabbix problem. I configured aggregate check, which should calculate the group load on outgoing eth0 for the whole group "Linux Servers" I have in Zabbix. Here is a screenshot of ...
0
votes
0answers
197 views

Tcpdump stops capturing wifi data while running in the background

I have a problem capturing wifi data using tcpdump while running in the background. OK, lets get some facts: my wifi-device is named wlan0 wlan0 is in monitor mode (that's what I want) I'm using ...
0
votes
3answers
154 views

Monitor HTTP usage on network from Linux free [closed]

I manage a small office network. I am looking to start monitoring/logging internet usage (website requests) for each user on a small network. All the windows clients are running through a switch to a ...
0
votes
1answer
63 views

Only one server behind a switch cannot access the internet and vice versa

I have multiple servers deployed behind a single switch. All the servers have their own public IP addresses. Suddenly one of them (say A) cannot be accessed from the outside by any means, e.g. HTTP, ...
-2
votes
2answers
98 views

Collecting Web traffic and monitoring reports [closed]

My company is a med home health company and I have been tasked with seeing what people are doing on the internet. There's been a lot of people complaining of people shopping, surfing internet, etc on ...
-1
votes
3answers
1k views

Script to log internet connectivity outage [closed]

What is the best approach to setting up a script to monitor and report a server's connection to the Internet? I'm not referring to connection to the local network, but rather a server's (or the whole ...
-3
votes
1answer
29 views

Grabbing sniffed packet data

So I have a Fiddler2 capture. In the capture, there was a file that was downloaded, file.dat. I am trying to extract the downloaded file from the capture. I can't seem to find any way to do that. Any ...
0
votes
1answer
128 views

Resource requirements for cloud OpenVPN server [duplicate]

I am building a proxy server for a client of mine. My platform of choice is Amazon EC2 with Arch Linux and Squid running. For the encryption part I have chosen OpenVPN for simplicity and large ...