GLWS · KNOWLEDGE BASE

Networking.
Addresses, names and routes.

Networking for VPS owners: DNS and IP basics, IPv6 setup, a WireGuard VPN, reverse DNS, SPF and DKIM, and diagnosing packet loss with mtr.

Most connection problems come down to DNS, routing or a firewall rule. Knowing how to check each one saves hours.

The guides range from DNS basics to IPv6, a private VPN and the records that decide whether your email is delivered.

4 networking guides

Networking7 min read

Separate interface, routing, name-resolution, and listening-port problems without changing your server's network configuration.

Networking16 min read

Create a WireGuard server and a client, route traffic through the VPS, open one UDP port and test that nothing leaks.

Networking13 min read

Check reverse DNS, test whether outbound mail ports are open, publish SPF, DKIM and DMARC records and decide between a mail server and a relay.

Networking15 min read

Check whether your server has IPv6, configure the address and route, update the firewall, publish AAAA records and test connectivity.