On shared hosting, hundreds of websites often share a single IP address. A dedicated IP belongs to one customer. Every VPS comes with at least one dedicated IPv4 address. Here’s what that actually changes, what it doesn’t, and when you’d want more than one.

Shared vs dedicated IP

Shared IP Dedicated IP
Used by Many sites/customers Only you
Reputation Affected by neighbours Yours to build and protect
Email sending Neighbours’ spam affects you Your own reputation; PTR control (where offered)
Allowlisting in APIs/firewalls Not possible (everyone shares it) Easy
Direct access by IP Not possible Yes (SSH, game servers, apps)
Non-HTTP services Limited Any port and protocol

Benefits that matter

1. Email deliverability Mail servers judge senders partly by IP reputation. On a shared IP, someone else’s spam can get your mail blocked. With a dedicated IP, plus SPF, DKIM, DMARC and correct reverse DNS (PTR), you control your reputation. On VPS.DO, outbound mail and PTR records are available on USA VPS plans. See email VPS and SPF, DKIM and DMARC.

2. Allowlisting Payment gateways, exchange APIs, partner systems, databases and corporate firewalls often allow access only from known IPs. A dedicated IP makes that straightforward. See VPS for trading bots.

3. Any service, any port Game servers, VPNs, mail servers, custom TCP/UDP apps, and remote desktop all need an IP that’s yours. See game server VPS and WireGuard VPN server.

4. Stable identity for your infrastructure Point DNS records, monitoring, and firewall rules at an address that won’t change while your service is active.

Myths

  • “A dedicated IP improves SEO.” Search engines don’t rank sites higher for having their own IP. Speed, uptime and content matter. (A shared IP with spammy neighbours is rarely a ranking problem either.)
  • “You need a dedicated IP for SSL.” Not any more: SNI lets many HTTPS sites share one IP. All modern browsers support it. See Let’s Encrypt.

When extra IPs help

  • Separating mail from web traffic, so their reputations stay independent.
  • Running several instances of a service that needs the same standard port (for example several game servers on 27015, or several mail domains with separate reputations).
  • Isolating client projects for agencies.
  • Geo or SEO testing from multiple addresses.

VPS.DO offers multi-IP VPS plans in the USA and Hong Kong. Use extra IPs for legitimate separation of services, not to evade blocks or rate limits. See multi-IP VPS and the legal policies.

Protect your IP’s reputation

  • Secure the server, so it can’t be hijacked to send spam or attack others. See Linux server hardening checklist.
  • Don’t run open relays, open proxies or open DNS resolvers.
  • Monitor blocklists if you send email.
  • Keep scraping and crawling polite. See web scraping on a VPS.

Check what you have

curl -4 ifconfig.me            # your server's public IPv4
dig -x $(curl -s4 ifconfig.me) +short   # its reverse DNS name, if set

On shared hosting, look up your domain’s IP and run a reverse IP lookup with an online tool. Many unrelated domains on the same address mean you’re on a shared IP.

Quick reference

Need Dedicated IP helps?
SSL for many sites Not required (SNI)
Better SEO No direct effect
Email deliverability Yes (with PTR, SPF, DKIM, DMARC)
API/firewall allowlists Yes
Game servers, VPN, custom ports Yes

Related: VPS IP addresses explained and VPS vs shared hosting.

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  • IP Addresses
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