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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1answer
67 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
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2answers
108 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 ...
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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 ...
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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
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1answer
134 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 ...
0
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1answer
189 views

network gateway can't see traffic for monitoring

I've just setup a new CentOS 6.4 machine to act as a default gateway for the LAN at head office. It's primary task is simply to route traffic to the appropriate place, ie VPN servers or the firewall ...
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3answers
178 views

How can I find which program is making a specific network request?

I have 2 Windows Server 2003 boxes that sit idle, for the most part, on weekends. Yet when I look at my router's DNS logs, both machine's are making many requests for www.yahoo.com when there's nobody ...
0
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1answer
283 views

add a cgroup controller into libvirt

libvirt by default has cgroup controllers of ["cpu", "devices", "memory", "blkio", "cpuacct"] as shown in qemu.conf. I want to add one more controller of net_cls. I tried to modify the config file to ...
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1answer
60 views

Masquerading a Webserver [closed]

I was trying to gain access to a piece of obsolete network hardware by intercepting into the configuration information that it is downloading from a remote server(with a public IP - This server exists ...
2
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1answer
139 views

Network monitor 3.4 issue

I am getting the following error message when I try to run network monitor on a windows 2003 DNS server I am trying to decommission. C:\>Nmcap.exe /network * /capture KerberosV5 || TCP.port==389 ...
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1answer
56 views

Developing an SNMP agent for linux

I'm developing a snmp agent for linux and I wonder if there is a directory or file proper protocol statistics snmp OIDs to develop snmpInPkts, snmpOutPkts, snmpInBadVersions, snmpInBadCommunityNames. ...
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1answer
481 views

Collectd Network plugins didn't open listening port

I tried to send the monitoring data to my centralized collectd and found this error in the log [2013-08-09 07:04:22] bind: Cannot assign requested address [2013-08-09 07:04:22] network plugin: ...
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2answers
164 views

Testing DNS “health” — whether domains are pointing to the correct IPs

I'm planning on switching from one registrar to another. Fortunately I've been able to pre-enter the zone information so that when the transfer takes place, everything should behave the same. ...
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1answer
339 views

Cisco Prime NCS not starting

I have received the Cisco Prime OVA file and which we placed onto an Oracle virtual environment. We turn the VM on and the CLI boots, When we try to start the NCS service we get errors. ...
0
votes
1answer
84 views

tshark duration of a conversation for a ip address

i can retrieve the follow info from a .pcap : ================================================================================ IPv4 Conversations Filter:ip.addr==1xx.1xx.0.1xx ...
2
votes
1answer
44 views

How can I monitor embedded, networked gear that doesn't have SNMP or any other standard protocols?

I need to monitor (and control if possible) hundreds of pieces of Audio Video gear. Every make/model uses a different protocol, usually simple ASCII strings like "status?\r" with a reply like "OK\r". ...
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4answers
1k views

Ping only OS Detection with nmap?

I am interested in using nmap for discovery, and to figure out the OS of each host. I understand that nmap does this, and can be enabled and controlled as described in the man page: OS detection ...
1
vote
1answer
311 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
619 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 ...
0
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1answer
213 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 ...
0
votes
3answers
387 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 ...
3
votes
1answer
611 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
1k 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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votes
2answers
149 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 ...
0
votes
1answer
99 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
519 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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0answers
259 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
664 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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0answers
96 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
177 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 ...
0
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2answers
222 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 ...
0
votes
2answers
183 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 ...
0
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1answer
129 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
262 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 ...
1
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1answer
73 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 ...
2
votes
2answers
188 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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votes
1answer
75 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 ...
3
votes
2answers
924 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 ...
0
votes
2answers
84 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, ...
0
votes
1answer
53 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
1
vote
1answer
547 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: ...
0
votes
1answer
213 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)
1
vote
1answer
839 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
184 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 ...
3
votes
1answer
102 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 ...
1
vote
1answer
68 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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votes
1answer
88 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
votes
4answers
268 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 ...
0
votes
2answers
337 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 ...
0
votes
1answer
253 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 ...