The Atlantic hurricane season runs from June 1 to November 30, and a question I hear a lot right now is simple: should we put a Starlink dish on the roof as our backup internet line?
My short answer is that Starlink for business can be a good backup line for a Central Florida office, and a disappointing one if you expect it to behave like your fiber. The difference is in details the order page skips: how your firewall switches lines, what depends on your office’s IP address, which plan you’re on, and what keeps the dish powered when the grid doesn’t.
Below is how I’d think it through for a 15 to 75 person office, including what the plans cost as of October 2026 and when 5G or a second wired carrier is the better backup.
Why a second line matters more in Central Florida
Most offices I work with run on cloud software: Microsoft 365 or Google Workspace, a hosted phone system, and a practice management or accounting platform someone else hosts. When the internet goes down, the office doesn’t slow down. It stops.
Big storms knock out several kinds of service at once. On the morning after Hurricane Milton made landfall in October 2024, outage data that providers filed with the FCC showed more than 12 percent of cell sites in the affected area out of service, mostly for lack of power. In Polk County, nearly half were down. Cable and wireline companies reported 1,273,354 subscribers out of service in the disaster area.
That’s the case for satellite. A dish on your roof doesn’t depend on the neighborhood cable plant or the nearest cell tower. It depends on a clear view of the sky and your own power.
In fairness to wired carriers, the outage that costs an office a day is, in my experience, more often a cut line on an ordinary Tuesday than a named storm. A good backup line covers both. (For storm questions to ask an IT provider, see my post on vetting IT companies in Orlando.)
Starlink for business as a main line or an automatic backup
As your only line, Starlink makes sense at rural sites with no fiber or cable. For an office in Orlando, Lake Mary, or Kissimmee with fiber available, my answer to the Starlink vs fiber question is nearly always the same: keep fiber as the main line. It doesn’t drop out in heavy rain. Upload is also Starlink’s weaker side. Its own support pages list upload speeds of up to 20 to 40 Mbps on its fastest residential plan, which is fine for calls and slow for large cloud backups.
As an automatic backup, Starlink fits most Central Florida offices. Your firewall gets two internet connections, keeps checking the main one, and sends traffic out the backup when the checks fail. That’s internet failover, and it works only if three things are true:
- Your firewall supports two internet connections. If it can’t, that’s a replacement, not a setting. The firewall is also a single point of failure, and nobody budgets for the firewall until it fails.
- The kit hands off cleanly. The Standard kit includes Starlink’s own Wi-Fi router. To feed your firewall instead, you turn on bypass mode, which shuts off Starlink’s Wi-Fi.
- The health checks are tuned. Starlink recommends having your router ping 8.8.8.8 or 1.1.1.1 every 10 seconds and mark the line down after 5 straight failures. Firewall defaults vary. Cisco Meraki’s documentation notes that when a line stays connected but stops passing traffic, failover can take about five minutes. Unplug your main line on a quiet afternoon and time it.
What breaks when the office switches lines
Calls and meetings in progress
When traffic moves to the backup, the office’s public address changes. Meraki’s documentation describes two settings for its firewalls: leave open connections on the failed line until they expire, or move them and disrupt them. Either way, expect calls in progress to drop. Ask your phone provider what your desk phones do when the address changes, then test it.
Weather matters, too. Starlink says moderate to heavy rain can cause momentary service dropouts. On a backup line, that’s a blip. On the only line in a phone-heavy office during a Florida summer, your staff will notice.
Anything tied to your office IP address
This is where Starlink business vs residential matters most.
- Residential plans stay on CGNAT. Starlink’s default IPv4 setup uses carrier-grade NAT (CGNAT), which doesn’t allow inbound traffic, and only Priority plans can switch to a public IPv4 address. Residential and Roam plans are also capped at 1,200 concurrent sessions, and Starlink lists dropped VoIP calls and one-way audio among the symptoms.
- Business plans get a public IP, not a static one. Priority plans can turn on a public IPv4 address that survives reboots, but Starlink says truly static IPs aren’t available, and moving the dish or a software update may change the address. If something really needs a fixed address, ask your second carrier whether it sells one.
- Port 25 is blocked. Starlink blocks outbound port 25 for all customers. Microsoft’s SMTP relay and Direct Send options for scanners require port 25, and IP-based relay needs a static address you don’t share. If your copier sends scans that way, scan-to-email stops during a failover. Methods using port 587 aren’t affected.
- Sign-in rules that trust the office. If your Microsoft 365 Conditional Access policies treat the office’s IP range as a trusted location, staff in the office will look like they’re signing in from somewhere else.
- Allowlists and VPNs. A bank portal, hosted practice software, or site-to-site VPN that only accepts your office IP will refuse the backup line.
Before you buy anything, list every system that depends on your office IP. For each one, decide whether to move it off IP-based trust, add the backup address, or accept that it’s down during a failover.
Power is the part people skip
A dish is only independent of the grid if something keeps it running. Starlink lists the Standard kit at 75 to 100 watts on average and 20 watts at idle, router included. That’s modest, but the backup line is useless unless the firewall, the switch, any phones powered by it, and the Wi-Fi access points stay up too.
- Put the network closet on a UPS. It rides out storm flickers and covers a Starlink quirk: the older Gen 2 router is designed to factory reset after 6 consecutive power cycles, which can happen during an outage, and a factory reset also turns bypass mode off. The Router 3 in the Standard 4 X box resets with a button instead.
- Decide what a generator covers. A UPS buys minutes or hours, not days. Without a generator, be honest about the plan: when the building is dark, people work from home, and the office backup line earns its keep after power returns but before your carrier’s lines are fixed.
- Take the dish down before the wind arrives. Starlink gives the Standard 4 X an operational wind rating of 60 mph+. A hurricane means sustained winds of 74 mph or more, and the National Hurricane Center issues a hurricane warning 36 hours before tropical-storm-force winds are expected. Starlink advises bringing the dish and cables indoors, if it’s safe, when hurricane-force winds are coming. Use the warning as your trigger, and name now who takes the dish down and puts it back up. If your mount makes that hard, ask about Starlink’s Performance kit, which has a survivable wind rating of 174 mph+. Survivable isn’t the same as working, though, and Starlink’s advice to bring the dish in still applies.
Starlink business plans and what they cost as of October 2026
Starlink sells U.S. business service for fixed sites as Local Priority plans, priced by how much priority data you get each month. Here is what starlink.com lists as of October 2026:
| Plan | Monthly price | Starlink’s suggested fit |
|---|---|---|
| Local Priority 50 GB | $55 | Backup connectivity and small businesses |
| Local Priority 500 GB | $155 | About 2 to 4 users |
| Local Priority 1 TB | $280 | About 5 to 10 users |
| Local Priority 2 TB | $530 | About 10 to 20 users |
Hardware is extra: $349 for the Standard 4 X kit or $1,999 for the Performance kit. Extra monthly data costs $25 per 50 GB block or $125 per 500 GB block. Every Priority plan includes priority network access, a public IP option, priority support, and a telemetry dashboard.
Before you pick the 50 GB plan as your backup:
- Top-ups are on by default. When the monthly data runs out, Starlink automatically adds 50 GB blocks. Opt out, and speeds drop to 1 Mbps down and 0.5 Mbps up. For backup use, Starlink itself recommends staying opted in.
- Size it for a bad week. Starlink pitches the 1 TB plan at 5 to 10 users. By that math, a 30-person office on backup for a week after a storm will go far past 50 GB, and top-ups will follow.
- A paused line won’t fail over. Business accounts can pause a line but can’t use Standby Mode, the paused option that keeps a low-speed connection alive. Budget for the backup as a monthly cost.
When 5G or a second wired line is the better backup
Here’s how the three common backup choices compare:
| Backup option | Best fit | Watch for |
|---|---|---|
| Starlink business plan | Regional storms; open sky and reliable power | Rain blips, no truly static IP, port 25 blocked, dish comes down for hurricanes |
| 5G or cellular backup internet | No roof access, quick setup, mostly local outages | Towers lose power in big storms; ask about data limits and public IPs |
| Second wired carrier | Steady call quality, heavy upload, no roof work | Shared poles or conduit; lines of the same type tend to fail together |
Cellular is the easiest to install, in my experience, and reasonable when your bigger worry is a cut line on your street. The Milton numbers are the warning: when towers lose power, cellular backup goes with them.
A second wired carrier works best with a different technology on a different physical path. Netgate’s multi-WAN documentation is blunt: two connections of the same type usually can’t be relied on for redundancy, and fiber from the same company may share poles or conduits. Ask each carrier where its line enters your building. If both share a conduit, one backhoe takes out both. Getting a second line to the right closet is often a network cabling job before it’s a firewall job.
For most 15 to 75 person offices here, I’d start with a wired main line plus Starlink on a dual-WAN firewall, with the closet on a UPS. If you can’t mount a dish, my next choice is a second wired carrier on a different path, then cellular.
Medical, legal, and accounting offices
Medical and dental practices. HIPAA’s Security Rule requires a contingency plan for emergencies, natural disasters included, with a required emergency mode operation plan. A backup line is one piece of that plan, not the plan itself. If your EHR or imaging system is cloud-hosted, test it over the backup line before you need it. Here’s how we support medical and dental practices.
Law firms. If your document management or remote access only trusts the office IP, find out before a storm how it behaves on the backup line. More on our work with law firms.
CPA and accounting firms. If your tax software, client portal, or bank connections only accept a known office address, list them now so a failover doesn’t lock you out during a deadline week. See how we help CPA and accounting firms.
None of this is legal advice. Your attorney decides the legal and regulatory questions.
The honest tradeoffs
Starlink still has costs and limits, and you should hear them before you sign up.
- It’s a monthly bill for something you hope not to use. As of October 2026, that’s $55 a month at minimum, plus $349 for the Standard kit.
- The uptime promise is a billing credit. Starlink commits to 99.9% uptime per billing period and credits 20% of that period’s fees when it misses. The credit doesn’t apply if the dish is obstructed or powered off.
- It needs a good spot. You need open sky, a cable route (the Standard kit’s cable is 15 meters, about 49 feet), and possibly your landlord’s approval.
- Untested failover isn’t a backup. Test it at least twice a year, once before June 1.
- It doesn’t fix anything else. It won’t keep a dead firewall running, and it won’t protect your data. If your files live in the cloud, read what really happens when you lose data in Microsoft 365 or Google Workspace.
Where I have a stake in this
Harmony MSP sells the work around a backup line: the firewall setup and managing the network afterward. We don’t install cable ourselves. When a second line needs new cabling, we scope it and introduce licensed low-voltage contractors you hire directly, and the one you hire may pay us a referral fee. I benefit if you decide it’s worth paying someone to do that.
There’s a less flattering reason this topic matters to us. When a backup line doesn’t take over, the first call goes to whoever runs your network. If that’s us, “it was never tested” is not an answer I want to give. Whoever sets up your failover, ask them to show you a test, with the times written down.
Frequently asked questions
What is the difference between Starlink and Starlink business?
Starlink’s residential plans are built for household use at a fixed address, with unlimited data and a CGNAT connection capped at 1,200 concurrent sessions. The business plans for a fixed office, called Local Priority, add priority network access, a public IP option, priority support, and a 99.9% uptime commitment with service credits, in exchange for a monthly data allowance. For an office that runs phones or VPNs, buy the business plan.
What are three disadvantages of Starlink?
First, heavy rain can cause brief dropouts, and the dish needs a clear view of the sky. Second, there are no truly static IP addresses, and outbound port 25 is blocked, which can break scan-to-email, VPNs, and IP allowlists. Third, the dish depends on your power, and Starlink advises bringing it indoors when hurricane-force winds are expected.
How much does Starlink for business cost per month?
As of October 2026, starlink.com lists U.S. Local Priority plans at $55 (50 GB), $155 (500 GB), $280 (1 TB), and $530 (2 TB) a month. Hardware is $349 for the Standard 4 X kit or $1,999 for the Performance kit. Automatic 50 GB top-ups are on by default, so a heavy month costs more.
Can Starlink be an automatic backup for my office internet?
Yes, if your firewall supports two internet connections. Put a Standard kit in bypass mode, connect it to the firewall’s second internet port, and tune the health checks. Then test it, because calls in progress are likely to drop during the switch, and anything tied to your office IP may stop working.
Where to start
If you don’t know what happens in your office when the main line drops, find out on a calm day, not during a storm. We’re happy to walk through it with you: what depends on your office IP, whether your firewall can fail over, and what would stay powered. No pressure and no obligation. Harmony provides IT support in Orlando and managed cybersecurity in Orlando for offices across Central Florida. Give us a call at (407) 720-6540 whenever you’re ready.
Sources
- NOAA National Hurricane Center, Tropical Cyclone Climatology, accessed October 8, 2026.
- Benton Institute for Broadband & Society, Milton’s Four Horses Ride Through Florida, October 15, 2024.
- Starlink, What are the Residential plans?, accessed October 8, 2026.
- Starlink, What is bypass mode?, accessed October 8, 2026.
- Starlink, Can I use my own router with Starlink?, accessed October 8, 2026.
- Cisco Meraki, Connection Monitoring for WAN Failover, accessed October 8, 2026.
- Starlink, Does weather impact my service quality?, accessed October 8, 2026.
- Starlink, What IP address does Starlink provide?, accessed October 8, 2026.
- Starlink, What are CGNAT session limits and how do they affect my connection?, accessed October 8, 2026.
- Starlink, What ports does Starlink block?, accessed October 8, 2026.
- Microsoft Learn, How to set up a multifunction device or application to send email using Microsoft 365 or Office 365, September 16, 2026.
- Microsoft Learn, Conditional Access Policy: Using Network Signals, April 1, 2026.
- Starlink, How much power does my Starlink need?, accessed October 8, 2026.
- Starlink, How do I factory reset my router?, accessed October 8, 2026.
- Starlink, Standard 4 X Kit Specifications, accessed October 8, 2026.
- NOAA National Hurricane Center, Glossary of NHC Terms, accessed October 8, 2026.
- Starlink, Performance Kit Specifications, accessed October 8, 2026.
- Starlink, Service Plans, accessed October 8, 2026.
- Starlink, Starlink Business: Fixed Site, accessed October 8, 2026.
- Starlink, What are Local Priority and Global Priority service plans?, accessed October 8, 2026.
- Starlink, Managing Priority Data, accessed October 8, 2026.
- Starlink, How does pausing service work?, accessed October 8, 2026.
- Netgate, Multiple WAN Connections (pfSense documentation), August 27, 2025.
- eCFR, 45 CFR 164.308, Administrative safeguards, accessed October 8, 2026.
- Starlink, What is the Starlink Service Level Agreement?, accessed October 8, 2026.
