Find guides, tutorials, and documentation to help you get the most out of CubePath services.
Showing 10 of 10 guides
Install OpenVPN and Easy-RSA on Ubuntu 24.04, build a certificate authority, route client traffic through the server with UFW and connect your first client.
Use SSH local, remote and dynamic port forwarding to reach private services, expose a local app and run a SOCKS proxy, then keep a tunnel up with systemd.
Diagnose Linux network problems step by step with ip, ping, dig, traceroute, mtr, ss, netstat and nc, and learn to read their output to find where it breaks.
Build a stateful iptables firewall on Ubuntu 24.04, apply it safely with iptables-apply, add SSH rate limiting, logging and IPv6 rules, and keep it on reboot.
Write a dual-stack nftables firewall on Ubuntu 24.04 with sets, SSH rate limiting and logging, apply it with a rollback timer and translate old iptables rules.
Capture traffic with tcpdump on Ubuntu 24.04, filter it by host, port and TCP flags, save pcap files for Wireshark and debug connection, DNS and TLS issues.
Use Linux tc to cap upload and download speed on Ubuntu 24.04 with TBF, HTB classes and an IFB device, verify it with iperf3 and keep the rules after a reboot.
Configure a static IPv4 address, gateway and DNS on Ubuntu 24.04 with Netplan, on Rocky Linux 9 with nmcli, and on Debian 12 with ifupdown, then verify it.
Set up a static dual-stack IPv6 address and gateway with Netplan on Ubuntu 24.04 or nmcli on Rocky Linux 9, open the firewall and test IPv6 connectivity.
Learn how reverse DNS works, set a PTR record for your server's IPv4 and IPv6 addresses in CubePath, and verify forward-confirmed rDNS for reliable email.
