Dynamic DNS providers for changing IPs, NAT traversal and remote home-server access.
The rankings are warming up.
Dynamic DNS services (DuckDNS, No-IP, dynv6, FreeDNS, Cloudflare API) map a domain to an IP that changes regularly (typical for residential connections). Your router or a client (ddclient, inadyn) updates the DNS resolution when your IP changes. Essential for exposing a home server, NAS, camera or self-hosted service without a static IP. Pricing: free for most uses, premium if you want a custom domain.
A VPN tunnels you into an entire network. Zero Trust (Cloudflare Access, Tailscale, Twingate) authenticates each request to each individual application - more granular and safer. Zero Trust is slowly replacing corporate VPNs.
Reverse tunnels (Cloudflare Tunnel, ngrok, Tailscale Funnel, Pangolin) initiate an outbound connection from your home to a remote PoP that relays inbound traffic back. No NAT or port forwarding required.
Yes for parallel downloads across links (xDSL + 4G + fiber), but a single TCP session remains capped by the fastest link. Useful for stability and redundancy, less so for game latency.