How to: Networking
* [Homenet Howto](https://www.homenethowto.com/) - Interesting guide to how computer networks work
* [Naresh Kumar](https://theprofessionalspoint.blogspot.be/2013/10/10-basic-linux-networking-and.html) - (2013) 10 Basic Linux Networking and Monitoring Commands You Should Know
* [Naresh Kumar](https://theprofessionalspoint.blogspot.be/2013/10/linux-server-monitoring-and-networking.html) - (2013) Linux Server Monitoring and Networking Commands for Linux Server Administrators - Part 2
* [Silver Moon](http://www.binarytides.com/linux-ss-command/) - 10 examples of Linux ss command to monitor network connections
* [Silver Moon](http://www.binarytides.com/linux-commands-monitor-network/) - 18 commands to monitor network bandwidth on Linux server
* [Daniel Miessler](https://danielmiessler.com/blog/security-how-to-monitor-your-network-connections/) - Security: How To Monitor Your Network Connections
* :star: [**Kickball/awesome-selfhosted**](https://github.com/Kickball/awesome-selfhosted) - list of Free Software network services and web applications which can be hosted locally
* [/r/netsec](https://www.reddit.com/r/netsec/) - network security on reddit
* [Google](https://www.youtube.com/watch?v=d90Ov6QM1jE) - [Video] How Google Protects Its Corporate Security Perimeter without Firewalls / Very interesting insight into Google's BeyondCorp Zero Trust Network.
* [MoonPoint](http://support.moonpoint.com/network/proxy/putty/) - Using PuTTY to set up a SOCKS Proxy Connection
* [MoonPoint](http://support.moonpoint.com/network/proxy/ie10-socks-proxy.php) - Configuring IE 10 to use an SSH SOCKS Proxy Server
* [Thomas Graf](https://www.slideshare.net/ThomasGraf5/dockercon-2017-cilium-network-and-application-security-with-bpf-and-xdp) - DockerCon 2017 - Cilium - Network and Application Security with BPF and XDP
* [Sreenivas Makam](https://www.slideshare.net/SreenivasMakam/docker-networking-common-issues-and-troubleshooting-techniques) - Docker Networking - Common Issues and Troubleshooting Techniques
* [VirtualBox issues tracker](https://www.virtualbox.org/ticket/14374) - Network adapters not working after host returns from sleep Win 7 host Linux Mint 17.2 guest
* [WhatsMyIP](http://www.whatsmyip.org/port-scanner/) - Port scanners & other networking tools
* [Vivek Gite](https://www.cyberciti.biz/networking/nmap-command-examples-tutorials/) - (2018) Top 32 Nmap Command Examples For Sys/Network Admins
* [LZone](https://lzone.de/cheat-sheet/Linux-Networking) - Linux networking cheatsheet
* [AboutMyX](http://www.aboutmyip.com/AboutMyXApp/SubnetCalculator.jsp?ipAddress=192.168.16.0&cidr=24) - Subnet mask calculator
* [Vivek Gite](https://www.cyberciti.biz/faq/linux-setup-default-gateway-with-route-command/) - (2015) Linux setup default gateway with route command
* [Vivek Gite](https://www.cyberciti.biz/faq/linux-route-add/) - (2013) Linux route Add Command Examples
* [Vivek Gite](https://www.cyberciti.biz/faq/linux-bastion-host/) - (2009) Configure Linux As Bastion Host
* [Hurricane Electric BGP Toolkit](https://bgp.he.net) - This website is an Internet analysis site for the whole Internet. useful tool to collect ip, addresses, etc
* [BGPView](https://bgpview.io/) - allows you to debug and investigate information about IP addresses, ASN, IXs, BGP, ISPs, Prefixes and Domain names.
* [Robtex](https://www.robtex.com/) - is used for various kinds of research of IP numbers, Domain names, etc. Examples : Reverse DNS Lookup, Whois, AS macros.
* [RIPE Database](https://apps.db.ripe.net/db-web-ui/#/query?bflag&searchtext=) - Webupdates / database query
* [CIDR/Netmask Lookup Tool](https://dnschecker.org/netmask-cidr.php) -  get information about a CIDR range including the IP addresses and host addresses contained in it.
* [Vivek Gite](https://www.cyberciti.biz/faq/linux-list-network-interfaces-names-command/) - (2018) Linux Show / Display Available Network Interfaces
* [CICR Tool](https://www.ipaddressguide.com/cidr) - Calculator for IP Range To CIDR / CIDR to IP Range
* [Sal Ferrarello](https://salferrarello.com/chrome-clear-redirect-cache/) - (2016) Chrome Clear Redirect Cache
* [The Goose-bearing bash shell](https://goosebearingbashshell.github.io/2016/11/12/how-to-get-your-ip-address-from-the-command-line.html) - (2016) How to get your IP address from the command line. TLDR;
type `curl ident.me` to know your public ip
* [Joyent Support](https://help.joyent.com/hc/en-us/articles/226687427-Watching-active-IP-connections-Linux) - (2016) Watching active IP connections - Linux
  * Incoming connections : `watch -d -n1 lsof -i`
* [Super User](https://superuser.com/a/848966/453117) and [Server Fault](https://serverfault.com/a/353134/298315)
  * Trace all connections on specific port to `/var/log/messages` (syslog) using iptables : `sudo iptables -I INPUT -p tcp --dport 443 --syn -j LOG --log-prefix "HTTPS SYN: "`
  * Trace all connections on specific port to `/var/log/messages` (syslog) using iptables : `sudo iptables -I INPUT -p tcp --match mu