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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3answers
2k views

When ntop is restarted the ntop counter gets reset and all stats are gone

I am using Ntop 3.3-13 to collect statistical data about network usage. When Ntop is restarted, all counters get reset and Ntop traffic stats page starts showing the output from the beginning. How ...
0
votes
4answers
734 views

networking monitor distros?

There's a lot of network monitoring recommendations in other questions, but none are what I'm looking for. I'm looking for a distro specifically targeted to doing passive network monitoring (either ...
0
votes
2answers
1k views

Make MRTG graph Titles more Specific?

MRTG defaults to titling each traffic graph as "Traffic Analysis for ${port_int}" I would like to instead have each graph titled by the description of the switchport. How could I do this?
0
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5answers
3k views

How can I monitor network performance in Linux? [closed]

I am managing a network with a Linux server (CentOS 5.4) and Windows XP Clients. Recently I have become concerned about network performance and would like to begin monitoring it. Is it possible to ...
1
vote
1answer
468 views

Forwarding SNMP GET requests

I have a cluster of linux servers and a single (gateway) linux server that can access the machines in the cluster by hostname or ip. From outside of the cluster the machines are not accessible by ...
4
votes
2answers
130 views

dual interface NIC with hw bridging?

I'm looking for a PCI NIC with two PHYs that is capable of bridging/switching in hardware but allows the host to monitor the traffic. Does such a thing exist? This would be running on a linux host. ...
1
vote
2answers
34 views

Need a resource to find out about latest attack activity?

Thought about this seeing another question pop up about a user agent string showing up in the poster's logs; is there a site for sysadmins to go to for finding the latest information about ...
0
votes
2answers
301 views

which Windows component establishes remote network sessions (with workgrup computers)?

My workgroup Windows XP Pro SP3 permits (or establishes itself) a hundred of network sessions with workgroup computers, see the result of "net sessions" below [1]. NetBT (NetBIOS over TCP/IP) is ...
11
votes
4answers
2k views

Windows Domain replication monitoring tool

I am looking for web-based interface GUI, or some kind of monitoring tool that will show replication status for a domain. I know I can use repadmin with various options on the command line to query ...
0
votes
3answers
128 views

Network “monitoring” for Mac OS infrastructure

Is there any free (and preferably open source, but not mandatory) solution to know how much bandwidth each macintosh is using. I have munin on a Debian, monitoring multiple linux servers, but I ...
1
vote
3answers
3k views

How can I monitor remote customer Windows/Linux PC's/Servers without opening a port in their firewall?

I work for an IT service provider - we support a range of Windows and Linux servers/PC's on our customer sites. I'm looking for a way to monitor basic stuff on these devices (e.g. disk space usage, ...
4
votes
3answers
4k views

How to simplify Nagios config in giant datacenter

Say I built 1000 servers from the same OS Image, everything is the same including SNMP configs (They all have unique IP addresses of course). For each server, I want to monitor the same 12 services, ...
0
votes
1answer
84 views

Rails 2, authenticity tokens, and monitors

What is the best way to monitor a rails app that is behind a login page? We are currently using Zabbix for all of our monitoring needs, but based on this forum post it doesn't seem like it is ...
4
votes
3answers
377 views

Reasonably-priced, multiple endpoint heartbeat software

We've got four servers in use for a mission-critical application that all need constant connectivity to each other--six always-up connections in total. I need a way to monitor these connections and ...
0
votes
1answer
347 views

real time network usage statistics monitoring/capture

I would appreciate any advice from experience from the community regarding the following challenge I've given myself - i.e. any pointers re best approach / direction here? Requirements Allow ...
2
votes
6answers
4k views

Detect computer which does port scanning

I have about 15 computers on a local network behind simple TP-LINK TL-WR340G router. Everything works fine and the router does its job. Recently we were informed that port scanning is being performed ...
0
votes
1answer
417 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 ...
0
votes
5answers
2k views

network timeout how to analyse problem

In the last three month I was experiencing that my internet connection started to get very slow and websites had long time to load. The first thing I made was an ping to www.google.com which showed ...
1
vote
3answers
180 views

what is my network doing?

I'm trying to determine what sort of data is coming or going from my domain. The activity light on my modem and firewall are flashing like crazy regardless of the number of actual computers connected. ...
6
votes
1answer
187 views

What service/network monitoring tools set thresholds dynamically?

The place I work for is interested in purchasing a product that, among other things, doesn't set hard thresholds for application alerts. Rather, it detects peaks and slopes, etc., and kind of ...
2
votes
5answers
3k views

Juniper NetScreen NS-5GT traffic monitoring

I've done casual research into the subject and am truly dismayed at the lack of compatible tools for such a simple task. Maybe someone can provide assistance. We have a NetScreen NS-5GT in the ...
0
votes
1answer
133 views

How to see if data is encrypted

Is there an easy way to tell if I am successfully encrypting transfers between me and my database? Can I look at the network monitor or something that will tell me? NOTE: I am new to any sort of ...
5
votes
5answers
271 views

Identical traffic

I am running an application server and logging all requests for analysis purposes later. One interesting trend I noticed last night was, I had a visitor from Texas on FIOS share identical traffic ...
0
votes
1answer
178 views

Approach for monitoring internet backbone traffic volume

I'm interested in getting a picture of relative volume across different internet backbones. In particular, I'd like to see how traffic volume over a given route differs over the course of a day or ...
4
votes
1answer
154 views

Best software for taking a “System Information Snapshot”?

I am curious what people would recommend as the best software for taking a system information snapshot? This would be for use in a technical support fashion.
2
votes
2answers
369 views

What kind of proxy acl rules should be applied?

I try to block sites in squid based on this article. Assuming you would want to block access to Yahoo (e.g http://www.yahoo.co.jp, http://www.yahoo.com, http://www.yahoo.co.in), you would ideally want ...
2
votes
1answer
255 views

How to customize the re-direct page when a user tries to access a blocked site

How to customize the html page which is re-directed when a user tries to access a URL which has been blacklisted by squid proxy server. acl blocksites url_regex "/etc/squid/squid-block.acl" ...
1
vote
2answers
630 views

How to prevent file uploads to the Internet from within the LAN

We use a Squid proxy server for outbound requests to the Internet. We would like to prevent any kind of file uploads to a website in the Internet (for example, RapidShare ...). How do we achieve this? ...
4
votes
1answer
1k views

How can I monitor VNC via Nagios?

I have a number of remote sites which have VNC running on a few computers for support purposes. They are (obviously) only available on our internal network. I am using Nagios to keep track of all ...
1
vote
1answer
399 views

Network Monitoring Tool Recommendation [duplicate]

Possible Duplicate: Network Traffic Monitoring Hello, My company is looking for a monitoring app/tool that would allow us to capture and graph statistics on network performance. As a ...
0
votes
1answer
713 views

SNMP counter issues with cisco RV082

Does anyone else poll this router with SNMP? We are using firmware version: 2.0.0.19-tz We are having problems with the traffic counters, some of them appear to be implemented as 16 bit counter ...
7
votes
5answers
1k views

What can SNMP be useful for in a small network?

I have been administering servers and clients in small business offices, and have never used SNMP. But I have read about it and it looks interesting. As what I understand, it is mostly useful if you ...
0
votes
5answers
898 views

Which network management system (NMS) to choose?

I need to integrate NMS in large enterprise system for data collection purposes. Primary requirements: collection by SNMP great scalability (up to 1,000 devices with 1,000 interfaces each) failover ...
1
vote
5answers
1k views

Is there a small business router that shows bandwidth usage graphs in the admin panel?

I support a large number of public libraries that are having their networks upgraded in response to a grant application. These libraries are generally home to between 6-15 computers and have little ...
3
votes
4answers
497 views

PHP Network Monitoring

Is there a way that I can monitor the traffic, Upload/Download (separately) using PHP? I`d like to echo out something like that: Upload: 523 GB | Download: 25 GB This should be based on the System ...
2
votes
3answers
735 views

Getting an alert when my oracle database goes up or down

How can I get an e-mail alert when my oracle database comes up or down? I have a database that I need to know when it goes down (it would be nice to know if it has come back up), preferably from a ...
0
votes
2answers
191 views

How To Perform Distributed Website Monitoring?

I would like to know how sites like the following perform distributed website monitoring (from multiple checkpoints/countries). pingdom.com, site24x7.com, uptrends.com, siteuptime.com, etc, etc. To ...
1
vote
3answers
208 views

Simple switch ports state monitoring tool

My users keep unplugging our meeting rooms computers network connection. As i can't check the computers every time a meeting ends, i'd like to find a tool, preferably running on windows, that can ...
3
votes
6answers
2k views

Determine who is opening a .PST file from a network drive on the local network?

Our system admin has been struggling with the issue of our network getting completely locked up when users open PST files from network drives. Apparently Microsoft is aware of this problem but there ...
5
votes
3answers
15k views

Open Source / free choices for SFlow monitoring?

I found the list here: http://www.sflow.org/products/collectors.php But was wondering if there are open source projects like Zenoss or others that can do SFlow collection and reporting for more than ...
2
votes
1answer
2k views

How to combine RRD files to an overview graph? (rrdtool, collectd)

I have collect runnings which puts performancedate like cpu usage oder network bandwith into rrd files. My problem is, that i have a single file for each node in the cluster. How can I get an ...
1
vote
3answers
104 views

Error reporting whilst away from desk

Just purchased some VPS hosting and am getting setup to get my startup app underway. For the moment I'm playing sysadmin and am running into errors galore whilst trying to work out the kinks. So I ...
1
vote
2answers
1k views

What are Discrete Alarms/Contact Closures/digital inputs? [closed]

I am doing research for a masters class and I was asked to research monitor and alarm systems. I have been looking all over the web for these subjects but it seems its something relatively new or ...
1
vote
1answer
932 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 ...
2
votes
1answer
116 views

What free and efficient web/trafic filtering options are good for this situation?

The Story (you can skip this if you like) So my girlfriend got a job as pedagog at a small boarding home (around 40 kids, age 10 to 18), 3 weeks ago. I went there once and surfed the web from a ...
0
votes
1answer
110 views

PolyCenter Netview & Console Manager

I'm looking to replace Polycenter Newview and Polycenter Console Manager with supported products. I'm starting with this list. Do you have any recommendations, either from that list or elsewhere?
0
votes
2answers
2k views

How To Monitor Home Wireless Network Connected Devices Bandwith [closed]

(Originally posted on SuperUser, not sure if it might be better suited here) I have in my home a standard Comcast cable internet connection. I have it going from the wall to a cable modem, and from ...
1
vote
1answer
1k views

Juniper router SNMP montioring

I've been asked to write a script that checks the status of all interfaces on a Juniper router using SNMP. I know how to use SNMP walk and have written a test perl script to retrieve the hostname. ...
2
votes
2answers
1k views

What are some decent competitors to ntop?

I've been trying to use ntop at my organization for a while and have had nothing but problems with it. The system I run it on is a fairly vanilla Redhat 5 system (Sun X4140) and ntop seems to run for ...
1
vote
2answers
286 views

Network monitor program

Is there network monitor program for windows servers can keep tracking throughput, pkt transmitted/received/discard/re-transmitted BY TIME? I am trying to find the reason causing my server network ...