An Nginx reverse proxy accepts requests on ports 80 and 443 and forwards them to an application on...
Networking and DNS on a server — guides
How to Open a Port in Wi...
There are three ways to open a port in Windows Firewall: the graphical “Inbound Rules” wizard, the netsh...
How to Open a Port in Li...
The simplest way to open a port in Linux is ufw: sudo ufw allow 443/tcp. For fine-grained control...
How to Check Open Ports:...
Open ports are checked from two sides: locally, to see which services are listening (ss -tulpn, netstat -tulpn),...
How to Change DNS Server...
To change DNS on a server, first work out what actually controls name resolution: a plain /etc/resolv.conf, systemd-resolved,...
DNS Records A, AAAA, CNA...
DNS records connect a domain name to IP addresses and services: A and AAAA point to an IP,...
Static IP on Windows Ser...
There are two ways to assign a static IP on Windows Server: through the “Network Connections” graphical interface...
How to Set a Static IP i...
Subnet calculator (CIDR) Enter an address with a prefix, for example 192.168.1.10/24 — you get the netmask, network...
Public vs Private IP Add...
A private IP is the address of a device inside your local network (for example 192.168.1.5), while a...
How to Find Your IP Addr...
To find your local IP address, run ipconfig on Windows or ip addr on Linux. To find your...