There is no such thing as the myth of a “perfect” green-field deployment. But in real life most of the times there is a just room/resources (e.g. time and money) for patches of green on a big brown-field.
What I really mean.. is that we can’t always keep up with the pace of new technologies and just re-design things from ground up following new trends without understanding or maintaining the legacy design or more importantly meeting the business needs.
Starting from the network and I like to create a basic network diagram will outline at glance things that could potentially limit infrastructure growth or expose it to potential risk that we need to mitigate. Designing , re-designing things well or better is based on getting the requirements right and verify that desired targets are met. To speed up this discovery process we use tools to gather the information we need. Continue reading “Powershell: How to perform Ping Sweep and Reverse-Lookup on a private network”
I use NMAP frequently and there are many times that I wish to have its functions on different environments. In this case I was interested in finding how many IP were available for capacity on a local network, knowing that all devices on my network have ICMP enabled.
Continue reading “PowerShell : Find-AvailableIP”
Monitoring your network resources and infrastructure effectively requires planning, knowledge of the metrics and experience of how to set up the threshold for warning and critical alarms and a lot of testing.
It’s very hard to focus on signals where there is too much noise.
Usually the tool you’re using doesn’t matter so much, what it’s really important what to implement more than how. And even if the configuration and the design are different we should be able to achieve similar results.
In this example I use a very popular tool such NMAP and with BaSH create a plain text report of a guest wi-fi network that sometime I want to generate.
Continue reading “BaSH and NMap to list all devices connected to a guest wi-fi network”
Most of the basic network checks start generally with name resolution (nslookup) , ping and trace route (tracert). These tools are powerful enough to check if everything is working as expected: i.e. NIC, DNS, FIREWALL or in general any SW or HW device is configured correctly or is having any issue.
Continue reading “NMAP, PING vs Test-Connection, Test-NetConnection”