This post has a collection of Linux commands for networking. There are basic linux network commands, advanced linux network commands and some centos network configuration commands, but I’ve tried to keep it to the point. jump to:Linux Network ConfigurationBasic Linux Network CommandsAdvanced Linux Network Commands Linux commands for Networking Configuration Read more…
Installing and configuring the fail2ban centos service fail2ban is a service for linux systems that checks log files for failed login attempts and automatically inserts firewall rules to block further attempts at logins from those IP addresses for a specified amount of time. Installing fail2ban on centos is relatively easy Read more…
Vagrant with sshfs. You can use sshfs in vagrant with only a private network. This is fine if you are doing all your devlopment from a single machine and dont need to access the vagrant box from your network, but if you need to run some testing from an external Read more…
Continuing on from my original metasploit beginners tutorial, here is a slightly more advanced Metasploit tutorial on how to use metasploit to scan for vulnerabilities. The outcome of this tutorial will be to gather information on a host and its running services and their versions and vulnerabilities, rather than to Read more…
Ad blocking on android using dns666. There are a ton of ad blocking apps on android, but dns666 is the best I’ve found after trying a number of them out – it works by setting a vpn back to your device and (selectively) routing all traffic through that vpn This Read more…
Vagrant with NFS and public_network. You can use NFS in vagrant, but it requires a private_network to work; This is fine if you are doing all your devlopment from a single machine and dont need to access the vagrant box from your network, but if you need to run some Read more…
yum-cron is an alternate interface to yum that is optimised to be convenient to call from cron. It provides methods to keep repository metadata up to date, and to check for, download, and apply updates. Rather than accepting many different command line arguments, the different functions of yum cron can Read more…
Configuring free ssl certs with letsencrypt in centos Using letsencrypt in centos requires a few modifications to your centos before you can run the letsencrypt client. The setup for vhosts in centos is different from the setup in debian based distros. This is how I modified my centos install to Read more…
Pihole on a raspberry pi – making a network wide advert blocker with a raspberry pi. I have a router using dnsmasq with adblocking setup on my router. I also have a raspberry pi (which was being used as a retropi machine). I also have a Pizero. My retropi setup Read more…
Trendnet 811dru optware – I tried for days and couldn’t get optware to work, so I ended up using entware (optware alternative) – at the end of the day it allows me to install stuff with a package manager in the 811dru, so I’m not bothered what its called :D Read more…
This post will show you how to use iptables on centos7. Centos7 has moved its firewall service to firewalld, away from iptables, but if you have been running centos for a while (I’ve been running iptables since I moved from ipchains), you will no doubt have a big list of Read more…
This post will explain ddwrt dnsmasq caching dns server configuration Using a ddwrt dnsmasq caching dns server lets machines in your LAN resolve DNS from a machine inside your local network, ultimately reducing the time to resolve an IP address from a domain name. If there is a result in Read more…
ddwrt custom prompt in ssh. This post will show you a quick way to set a custom prompt when you log in to your dd-wrt router using the web-ui. The advantage of adding your scripts here is that if you don’t have permanent storage (eg a usb drive plugged in) Read more…
This post will show you how to setup dnsmasq in order to serve dns requests for (multiple) internal domains – using dnsmasq as an internal DNS server. Using this setup you can also add block lists so that your entire network doesnt get adverts :D eg you can serve a Read more…
Multiple ip addresses on one physical NIC. I have a gigabyte brix running esxi to host a few virtualised servers. I have one server for my web development. I have multiple apps that all require running on port 80. I have one physical network port. Fortunately, you can have multiple Read more…
My New HomeLab Gigabyte Brix – 8 GB HyperX DDR3 ram for now (another 8GB on its way) Another 8GB has been ordered, bringing me up to 16gb. I’ll be upping the available ram for my Kali install and upgrading my windows 8 to windows 10! – 16GB usb drive Read more…
Linux / OSx commandline network host discovery This post contains Various ways to find the hosts in your network using commanline commands. For the following, it is assumed that: 192.168.1.0/24 is your whole network 192.168.1.255 is your broadcast address Replace with your own values (you can find these with ifconfig) Read more…
Here is a little script that will turn off mail for every domain in plesk! I use it as part of an automated domain creation script to be doubly sure that mail is sent from external mail services and isn’t received internally in the plesk machine (preventing users getting their Read more…
M-business Security Threats: Device as an attack vector with mobile devices widespread they are commonly being used as attack vectors Virii While not many viruses exist for mobile devices themselves, mobile devices are being used to speed viruses inside networks as most mobile devices don’t have antivirus software installed Default Read more…
Subnetting class C networks Benefits of Subnetting: Reduced Network Traffic Optimised Network Performance – as a result of reduced traffic Simplified management Facilitated spanning of large geographical distances How to create subnets: Determine the number of required network ID’s one for each subnet one for each WAN connection Determine Read more…
We recently upgraded plesk to v11.0.9 at work We use an external DNS service, so dont need plesk to handle it for us. it turns out that there isnt a way to disable dns from the plesk panel. you can go to tools > DNS settings and turn DNS off Read more…
this site from google will tell you if your dns servers are ready for ipv6. if they arent then you could add googles public dns [8.8.8.8] or the opendns ip address [208.67.222.222] see this post for instructions on how to add opendns to your mac and this post for instructions Read more…
Osx has a lot of built in tools. there is a wifi analyser / packet capture tool to open it, just hold down ALT + click on the wifi icon in the menu bar the dropdown menu will have a lot more information, eg transmit rate / security info for Read more…
This post will show you how to setup a wireless internet connection from your mac to your phone so that you can get internet through your phones 3g connection! assuming you are allowed the personal hotspot functionality by your provider: on your iphone goto settings > personal hotspot if you Read more…
To join a wireless network on an ipad or an iphone all you have to do is: go to settings > wifi wait for a second for the iphone or ipad to find the available wireless networks pick the network you want to connect to enter the passphrase when prompted.
To stop you iphone or ipad asking you to join lots of different wifi networks all you have to do is: go to settings > wifi at the bottom you will find an option called ‘ask to join networks’ just slide it to ‘no’ and your iphone or ipad will Read more…
I have a western digital mybook word NAS. Using the afp protocol file transfers were very slow. I knew there had to be a way to make your AFP NAS more responsive. It seems slow when you try to connect to it from a mac using AFP, but its lightning Read more…
Automount network drive on startup osx. This will show you how to automount a network drive when you login to osx lion. This method will persist through a reboot, so your drive will always be available. Connect to your network drive (finder > go > connect to server) Enter the Read more…
This short blog post will show you how to enable spotlight indexing on a network drive. I have also added the commands to disable spotlight indexing on network drive that’s already indexed. The first thing you have to do is to make sure you connect your network drive to the Read more…
Yesterday I was securing a server to pass the PCI tests and the Mcaffee tests for a client of our’s. We have a Basic iptables firewall for linux that we use as a template – I didnt manage to get the firewall rules set properly for the client, so I Read more…
