How to hardware-reset (or passwort reset) without monitor or console?

Question

Hi everybody, 
 
 since my KeePass container somehow disposed my admin-password to the utm webinterface (UTM 120 appliance), I am no longer able to gain access to it. 
 I tried to hook up a serial connection, but everything putty (or kitty, tried both) shows is a blank, black CLI. Nothing else. COM interface as shown in windows settings with speed of 9600 (default setting). 
 When linking the appliance via VGA to my monitor, it shows a nice and clean nothing to it (e.g. the monitor changes from analog back to digital due the lack of a signal). 
 The appliance was updated to the newest version two weeks ago, if that information is helpful. 
 So, the big question is: How will I be able to regain access to the aapliance? Data-loss accepted if needed. 
 Any ideas? What am I doing wrong?

ChrisBKA · Accepted Answer

Hi, 
 
 afaik there is no requirements in this bootmode... have u tried entering an stupid password like ... test or something? 
 Maybe there is another keymap in recoverymode than in your actual setup ? 
 qwertz to qwerty or sth ? 
 
 Cheers, 
 Chris

Gabriel Lohre · Answer

Soooo, seems there was probably a problem with the user Password before. 
 I had tried my two firstnames as example. Both using the correct key mapping to a qwerty layout (even when used on qwertz as you correctly assumed). 
 So this time, I tried "test" as password for root. I immediately tried it out after reboot and I was able to login. NICE! Appliance beeped shortly afterwards as signal to be booted completly. "exit" -> relogin: "password incorrect" *WTF* 
 There is ANOTHER hurdle: Sophos (nicely) checks the used passwords agains simplicity, length and (and this I did not expect) dirctonary. So obviosly, both names where contained in that dictionary. Either the password was accepted without error or, which may be now as I saw the specific errors, I just oversaw that password because the shell still announce the password as being set. Even if it is not, as it seems. 
 Next turn, I tried out some passwords an finally "ClosedDoor" did not throw any errors (nothing in dictionary, huh? Oo). 
 Login worked, password-reset worked, set-new-webadmin-password-form showed up. 
 On webadmin I changed the passwords to strong ones, excluding not-same-mapped characters. Tried to login to console with the new password: Works (typing random 30 chars is a pain, when shell resets after some seconds xD ) 
 
 tl;dr: Reset worked with both instructions (obviously as they were the same). Just keep an eye on the password policy errors! 
 
 Thanks you both for your nice help :)

sachingurung · Answer

Hi Gabriel, 
 You might need to re-image the appliance, refer How to re-image a Sophos UTM and Astaro Security Gateway (ASG) Appliance . 
 Any help?