Sophos XGS 87: How to do an emergency image reload from the boot loader
By Sai Kiran Pandrala · reviewed by Sai Kiran Pandrala, Editor Last verified: 2026-05-30
| Vendor | Sophos |
|---|---|
| Operating system | SFOS (Sophos Firewall OS) |
| Category | Upgrade Failure |
| Skill level | Intermediate to advanced |
| DIY-able? | Yes with CLI access; some scenarios need Sophos Support + RMA. |
Upgrade work on a Sophos fleet is mostly about discipline. SFOS (Sophos Firewall OS) gives you the commands; the failure mode is almost always operator error. wrong image for the platform, integrity not checked, no rollback plan. The XGS 87 family is no exception.
I always do a one-box pilot before a fleet roll. system firmware-upload type=usb on a single representative unit, then 24 hours of soak, then the rest of the fleet in waves. Skipping the soak has bitten me twice.
Sophos Support will want the exact build string and the upgrade method (CLI vs controller-driven) on every case, so keep that recorded for the change ticket.
What this guide covers
Do an emergency image reload from the boot loader on a Sophos XGS 87 (SFOS (Sophos Firewall OS)).
Step-by-step
- At the boot loader, configure IP, gateway, TFTP server.
- Download the image.
- Set the boot variable to the new image.
- Reset to boot.
CLI / commands
# Boot recovery prompt: Recovery console (USB)
# Verify image
system version (CLI)
# Upgrade
system firmware-upload type=usb
# Save / commit
(auto-saves in Web UI; CLI changes persist)
# Rollback
system backup-restore restore
Recovery options
- Boot loader recovery (Recovery console (USB))
- Rollback to the previous image with
system backup-restore restore - Force failover to a known-good standby (HA platforms)
Frequently asked questions
Will this work on my specific SFOS (Sophos Firewall OS) version?
The procedure reflects current SFOS (Sophos Firewall OS) behaviour. Older releases may need minor syntax adjustments, use the CLI help (? or tab-completion) to verify.
Should I open a Sophos Support case immediately?
Open one if you suspect hardware failure or the symptom persists after a maintenance-window reload. Make sure your support entitlement is active first.
Where can I find the Sophos official documentation?
https://support.sophos.com/support/s/: search the product family + feature name.
Is this procedure safe in production?
Test in a lab or maintenance window first. Capture pre-change state so you can roll back.
Related guides
Related fixes
Related guides worth a look while you sort this one out:
- Sophos XGS 107: How to do an emergency image reload from the boot loader
- Sophos XGS 116: How to do an emergency image reload from the boot loader
- Sophos XGS 126: How to do an emergency image reload from the boot loader
- Sophos AP6 420: How to do an emergency image reload from the boot loader
- Sophos AP6 420E: How to do an emergency image reload from the boot loader
- Sophos XGS 87 partial boot then reload loop: Diagnose & Fix
References
- Sophos support portal: https://support.sophos.com
- Sophos knowledge base: https://support.sophos.com/support/s/
- Sophos security advisories: https://www.sophos.com/en-us/security-advisories
- Open a case: https://secure2.sophos.com/en-us/support.aspx
Reference material, not professional advice. Validate against your specific SFOS (Sophos Firewall OS) version and test in a non-production environment before applying.
Why this matters for your day-to-day
A Sophos device that's misbehaving costs more than the fix itself: lost productivity, missed calls, security risk, even safety risk in some categories. Treating the symptom quickly with a documented procedure is cheaper than letting it persist. The steps above are written to get you back to working in under an hour where possible, and to flag clearly when escalation is the right call.
Before you start
A few things to confirm so the Sophos device fix goes cleanly:
- Latest firmware downloaded if you're going to update.
- Warranty + support contract status checked, opening sealed parts may void it.
- Backup of current configuration (where applicable) taken.
- Spare parts on hand if you anticipate replacement.
- Adequate workspace, lighting, and time. rushing causes regressions.
Quick verification
Before you walk away from a Sophos device fix, run through:
1. Reproduce the original trigger, does the issue reappear? 2. Check the device's status / health screen for any new alerts. 3. Confirm paired devices (app, hub, controller) reconnected. 4. Save / commit any configuration changes per the device's normal workflow. 5. Note the change in your maintenance log with date + firmware version.
Escalation guide
For a Sophos device, the right escalation depends on impact:
- Cosmetic / minor: log a ticket via the Sophos app or web portal. Response 1-3 business days.
- Mid-impact: phone support. Have your serial number ready.
- Critical (production down, safety issue): in-person dealer / TAC visit. Bring proof of purchase.
- Out of warranty: third-party repair shop with manufacturer-certified technicians.
More frequently asked questions
Should I update firmware first or last?
Update firmware first if a release note specifically mentions your symptom. Otherwise, finish the troubleshooting flow first, then update; that way you can isolate whether the update or the underlying fix solved it.
Is it safe to apply during business hours?
If the device is in production use, apply during a scheduled maintenance window. Most procedures need 2-15 minutes of downtime. Capture pre-change state so you can roll back if needed.
How often should I run preventive checks?
Quarterly for most consumer devices; monthly for production / commercial devices. Set a calendar reminder so the device stays healthy between issues.
Will this void my warranty?
Applying official firmware updates and following the user manual will not affect warranty. Opening sealed components, jumping safety circuits, or using third-party parts can void warranty in most jurisdictions.
Does this affect other devices on my network?
Generally no. The procedure is local to this device. Network-side changes (firmware updates that affect TLS, SMB, or routing) are flagged explicitly in the steps.