Windows
Firewall login failed because the account was not present on the appliance
The user could not log in to the firewall because the expected account was not found on the firewall or in Active Directory. A new firewall account was created, added to local admin, and new credentials were issued; login then worked.
Killed once by someone from XL.net, on 2026-10-26.
Affects
Apps
- SonicWall NSV
What you see
- Login to the firewall rejects the password or will not accept the existing account.
- The account is missing from the firewall user list and from Active Directory.
Why it happens
Likely Suspected cause: the expected firewall account did not exist on the appliance, so the old login could not authenticate.
When it shows up
A user cannot sign in to the virtual firewall and the account is not found on the firewall or in Active Directory.
You are in this case if:
- Firewall account not present in the appliance user list.
- No matching user found in Active Directory.
- Login succeeds after a new account is created and granted local admin on the firewall.
1 fix below
The steps that killed it
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Someone from XL.net killed this on a Windows computer on 2026-10-26. It is written up from that one repair, so it cites no outside page.