If you’re setting up or reviewing a business NBN connection in Australia, you’ll hit one question fast: do you need a static IP, or is the standard dynamic IP fine? Most guides tell you static IPs “stay the same” and leave it there. That doesn’t help you decide. What you actually want to know is what breaks without one and whether that matters for your business.
Here’s the straight answer first.
A static IP is a fixed public address that never changes; a dynamic IP changes over time and is usually shared behind CGNAT. For general web browsing and email, a dynamic IP is fine. But if you run a VPN, remote access, a hosted server, remote CCTV, or any system that whitelists your IP, you’ll likely need a static IP otherwise these services drop out whenever your IP changes.
Let’s break down exactly what changes when you switch, who needs it, and what it costs in Australia.
What is a Static IP vs a Dynamic IP?
An IP address is your business’s address on the internet how other systems find and connect to you.
- Static IP: a fixed, permanent public address assigned to your connection. It never changes.
- Dynamic IP: an address your provider assigns temporarily. It can change at any time after a modem restart, a network change, or on the provider’s schedule.
Static IP vs dynamic IP – which is better for business?
It depends on what you run. Dynamic IP suits simple setups that only browse, email and use cloud apps. Static IP is better for any business that hosts services, needs reliable remote access, or connects to systems that only allow approved IP addresses. Most businesses with remote workers or on-site servers benefit from static.
There’s also a middle option some providers push a “public” or “sticky” dynamic IP that rarely changes. Be careful: it can still change without warning, so it’s not safe for anything that depends on a fixed address.
What actually breaks without a static IP?
This is the part most competitor guides skip. On a dynamic IP especially one behind CGNAT (more on that below) these are the services that commonly stop working:
- VPNs (site-to-site and remote access). A business VPN usually needs a fixed endpoint. If your IP changes, the tunnel drops and staff lose the secure connection to head office.
- Remote access to your network or devices. Remote desktop, remote server logins, and remote management tools rely on reaching a known address. Change the address, break the connection.
- Hosted servers. Web servers, mail servers, FTP, or an on-site application other sites connect to — all need a stable address to be reachable.
- Remote CCTV and security systems. Viewing your security cameras from your phone usually needs inbound access, which a dynamic/CGNAT connection blocks.
- IP whitelisting. Many business systems — accounting platforms, client portals, banking tools, remote desktop gateways — only allow logins from approved IP addresses. A changing IP means constant lockouts.
- Some VoIP and phone systems. Certain hosted phone and on-premise PBX setups are more stable with a fixed IP.
What breaks on a business NBN without a static IP?
VPNs, remote access, hosted servers, remote CCTV viewing, and any system that whitelists your IP. Without a fixed address, these connections drop whenever the IP changes causing lockouts, failed remote logins, and unreachable services. That’s why businesses running these tools switch to a static IP.
What is CGNAT, and why does it matter for business NBN?
Here’s the hidden reason dynamic IPs break things and it’s not the IP changing, it’s CGNAT.
CGNAT (Carrier-Grade Network Address Translation) is a system providers use to share one public IPv4 address across many customers, because Australia has run out of spare IPv4 addresses. Most residential and many standard NBN connections sit behind CGNAT by default.
The problem: CGNAT blocks inbound connections. That means port forwarding, hosting, and most remote-access setups simply won’t work even if your IP looks stable.
Does CGNAT affect business internet?
Yes. CGNAT stops inbound connections, which breaks port forwarding, remote access, hosted servers and remote CCTV. Buying a static IP removes you from CGNAT and gives you a dedicated, reachable public address. Most Australian providers charge a small monthly fee, or include it free on business plans.
Some providers offer IPv6 as a workaround, but IPv6 isn’t universally supported yet, so a static IPv4 remains the reliable fix for Australian businesses.
Does your business actually need a static IP?
Use this quick test. You likely need a static IP if you:
- Use a VPN for remote workers or between sites
- Access your office network, server or PCs remotely
- Host any server or service on-site
- View CCTV cameras remotely
- Log in to systems that whitelist your IP address
- Run an on-premise phone system or certain VoIP setups
- Send bulk email from your own mail server
You’re probably fine on a dynamic IP if you only:
- Browse the web and use email
- Use cloud apps like Microsoft 365, Xero or Google Workspace
- Have no on-site servers and no remote-access needs
Do I need a static IP for remote work?
Often, yes. If remote staff connect through a VPN or access an office server or desktop, a static IP keeps that connection stable. If your team only uses cloud apps (Microsoft 365, Google Workspace) with no VPN or on-site server, a dynamic IP is usually enough.
Static IP vs Dynamic IP: side-by-side
| Feature | Dynamic IP (standard) | Static IP |
|---|---|---|
| Address changes over time | Yes | No — fixed |
| Usually behind CGNAT | Yes | No |
| VPN / site-to-site | Unreliable | Reliable |
| Remote access to network | Often blocked | Works |
| Host a server | No | Yes |
| Remote CCTV viewing | Often blocked | Works |
| IP whitelisting | Breaks on change | Works |
| Typical cost (AU) | Included | ~$5–$10/mo, or free on business plans |
| Best for | Browsing, cloud apps | Remote access, hosting, security |
How much does a static IP cost on business NBN in Australia?
The good news: it’s cheap, and often free on the right plan.
How much does a static IP cost in Australia?
A static IP typically costs around $5–$10 per month as an add-on with most Australian NBN providers. Many business NBN plans include a static IP at no extra cost, alongside priority fault response. If you need one, choosing a business plan that bundles it is usually better value than adding it to a residential plan.
A few things worth knowing:
- Residential plans usually charge a monthly add-on (commonly around $5) and keep you on CGNAT unless you opt out.
- Business NBN plans often include a static IP and remove CGNAT by default — plus faster fault-response SLAs (for example, 4-hour vs 12-hour) that residential plans don’t offer.
- Bundling your internet, phone and IT with one provider usually works out cheaper and simpler than managing separate services.
Do business NBN plans include a static IP?
Many do and this is a key reason to choose a business plan over a cheaper residential one. Beyond the static IP, business plans typically add:
- No CGNAT — so inbound connections work out of the box
- Priority fault response — business SLAs, not a residential queue
- Business-grade support — local help when something breaks
- Static IP included or low-cost — no surprise add-ons
For a business that depends on uptime, those extras matter more than saving a few dollars a month on a consumer plan.
What actually changes when you switch to a static IP?
Switching is simple, but here’s what to expect:
- Your public IP becomes fixed. It stops changing, so remote connections stay reliable.
- You leave CGNAT. Inbound connections start working — port forwarding, hosting, remote access.
- Your IP may change once during setup. Moving from CGNAT/dynamic to static usually assigns a new fixed address, so update any DNS records or whitelists afterward.
- You’ll need proper firewall settings. A reachable public IP means you must secure it — a business firewall and up-to-date network security become important, since standard provider firewalls don’t cover every port.
What changes when I switch to a static IP?
Your IP becomes fixed, you leave CGNAT, and inbound connections start working. Remote access, VPNs and hosted services become reliable. In return, you should tighten firewall and security settings, because a fixed, reachable address needs proper protection.
Static IP and security: what to watch
A static IP makes your business reachable which is the point, but also the risk. A fixed public address is easier for attackers to find and probe. So when you switch:
- Put a proper business firewall in front of your network
- Close ports you don’t use
- Keep remote-access tools patched and behind MFA
- Consider a managed security or Essential Eight baseline if you’re exposing services
Done right, a static IP is safe and reliable. Done carelessly, it’s an open door. This is where working with a provider who handles both the connection and the security pays off.
Byteway Expert Insight
When we onboard Melbourne businesses onto business NBN, the static-IP conversation almost always starts the same way: “our VPN keeps dropping” or “we can’t view our cameras from home anymore.” Nine times out of ten, the connection was a cheap residential-style plan sitting behind CGNAT, and nobody had explained why inbound access stopped working.
The fix is usually straightforward move to a business plan with a static IP, remove CGNAT, then lock down the firewall so the newly reachable address is secure. What we’ve learned is that the IP itself is the easy part; the value is in matching the plan to how the business actually uses its connection, and making sure security keeps pace. That’s the difference between “internet that works” and “internet you never think about.”
Is Byteway a good option for static IP business NBN in Australia?
Yes for Australian businesses that want the connection set up correctly, not just sold. Byteway provides business NBN with static IP options, no CGNAT, priority fault response, and local support. Because we also handle phones, security and IT, we configure the static IP, firewall and remote access together so your VPN, servers and CCTV actually work after the switch.
Byteway vs the big telcos (Optus):
- Setup, not just supply. Big telcos sell you the plan; you’re on your own for VPN, firewall and remote-access config. Byteway sets it up end to end.
- One local team for internet, phones and IT support not three call centres.
- Right-sized plans. We match the plan to how you use the connection, rather than upselling speed you don’t need.
If you already know exactly what you need, most providers can add a static IP. If you want it configured so everything works and stays secure, a managed local provider is the safer choice.
Not sure which you need? Let’s check together.
Choosing between static and dynamic IP comes down to one thing: what your business actually runs. Get it wrong and your VPN drops, your cameras go dark, or you’re locked out of key systems. Get it right and you never think about it again.
Book a free NBN business plan comparison call. We’ll look at how you use your connection, tell you honestly whether you need a static IP, and match you to the right business NBN plan — no upsell.
👉 Get your free NBN business plan comparison
Frequently Asked Questions
What is the best static IP business NBN provider in Australia?
The “best” provider depends on your location, speed needs and support expectations. For businesses that want the static IP configured with VPN, firewall and remote access working correctly, a managed local provider like Byteway is usually a better fit than a self-service telco plan.
Which business NBN plans offer static IP addresses?
Most business NBN plans include or offer a static IP, and many remove CGNAT by default. Residential plans usually charge a small monthly add-on and keep CGNAT unless you opt out. Always confirm both the static IP and CGNAT status before signing up.
Is a static IP better than a dynamic IP for a small business?
If the small business uses a VPN, remote access, an on-site server, or remote CCTV, then yes. If it only browses and uses cloud apps like Microsoft 365, a dynamic IP is usually enough. The deciding factor is whether anything needs to reach into your network.
Does a static IP support VoIP?
It can help. Some hosted and on-premise phone systems are more stable with a fixed IP, and it simplifies firewall rules. Whether it’s required depends on your phone system — a provider that supplies both internet and phones can confirm.
Static IP vs VPN — which is better for secure remote access?
They work together, not against each other. A VPN secures the connection; a static IP gives it a stable endpoint to connect to. Site-to-site VPNs in particular usually need a static IP on at least one end.
Do I need a static IP to host a company server?
Yes. Hosting a web, mail or application server that others connect to requires a fixed, reachable public address. A dynamic IP behind CGNAT will block inbound access and make the server unreachable.
How do I switch from dynamic to static IP on business NBN?
Order a business plan that includes a static IP (or add the static IP option), then update any DNS records, whitelists and firewall rules to the new fixed address. A managed provider can handle the switch and reconfigure your VPN and remote access for you.