How to bypass ""Cannot find Signature" when updating your antminer firmware.

[mikeywith]

Does that firmware also disable ssh? That's their new method, signature + disabling SSH.

ya apparently , i was not aware of this when i posted my last message, this method is useless if you have no access via SSH, all new 2019 firmware have the SSH function disabled, the only way to get around this so far is by using an SD card to flash your firmware.

[Dennicex]

ya apparently , i was not aware of this when i posted my last message, this method is useless if you have no access via SSH, all new 2019 firmware have the SSH function disabled, the only way to get around this so far is by using an SD card to flash your firmware.

It is a pity that there are no other options to solve this problem. This complicates the process a bit. But I hope that some solution will appear soon.

[m3hm3t]

I started to get this error after installing the new firmware of D3 so I did exactly the same Mike showed me how to.But Didn't work! then I realized in the www/pages/cgi-bin there is 3 file connecting each other and this three are calling each other.

"upgrade.cgi"
"upgrade_clear.cgi"
"upload_conf.cgi"

so I edited with this files in ssh editor I searched in existing "Cannot Find Signature" so I put # type before words as like Mike's codes. and worked for me. Thank you again Mike. Yes I think with the latest firmware having strong security with this 3 files I think.

[efudd]

I started to get this error after installing the new firmware of D3 so I did exactly the same Mike showed me how to.But Didn't work! then I realized in the www/pages/cgi-bin there is 3 file connecting each other and this three are calling each other.

"upgrade.cgi"
"upgrade_clear.cgi"
"upload_conf.cgi"

so I edited with this files in ssh editor I searched in existing "Cannot Find Signature" so I put # type before words as like Mike's codes. and worked for me. Thank you again Mike. Yes I think with the latest firmware having strong security with this 3 files I think.

There is a much much simpler way to do this.

mv /usr/bin/openssl /usr/bin/openssl.orig
echo > /usr/bin/openssl <<!
#!/bin/sh
return 1
!
chmod +x /usr/bin/openssl

Done. Fixed. /usr/bin/openssl will return true, the "check" will pass... the only caveat is sometimes the firmware you want to upgrade to will need a 0 byte .signature file to pass the "-f" exists check.

-j

[caeltrade]

This worked for my L3+ that was on the blissz FW then downgraded to the L3++ FW from Bitmain, then back to Blissz.  After downgrading to L3++ I got the signature not found and did the above to fix.

Thank you!

Glad this worked out for you as well, did you face any difficulties? was the guide easy enough to follow? please let me know if you think i need to clear out any of the steps.

Thanks.

What if you can't SH in? Am I hosed?

[HashMark]

i have a antminer L3+ when i upgrade to Blissz new firmware a pop up (cannot find signature) so i google it and found your post great step by step by the way, but for some reason it don"t work for me. wondering if it can be done on my miner. thanks

[HashMark]

step 10
:q enter  then this shows up " -sh: :q: not found" does this look correct?   

[HashMark]

awesome the upgrade did take No more cannot find signature!! thanks

[hubertcht]

Hi guys.

I cant acces ssh
 Connection failed. FlowSocketConnector: Failed to connect to target address. Windows error 10061: No connection could be made because the target machine actively refused it.
Is there any chance I can acces my L3+.

[Grockubit]

Where can you get original v1.0.1.3 for L3+, since it's not on the Bitmain website? The two links they have up are only for 1.0.1.4, which contain the "Cannot find Signature" issue, as well as no SSH.
I wanted to be able to go back and forth from Blissz to original Bitmain firmware, if need be.

[CryptoBuzzerd]

Have all kind firmwares to s9,t9,d3,l3 - pm me if you need. also can help with unlocking bitmains firmware

[ahbear507]

Thanks for info, but i can't get it working, my l3+ is on firmware 2018. After i followed your instruction and save the upgrade.cgi,

I try to upgrade it to the bliszz firmware, but the same cannot find signature error happened.

[antminerguruguy]

Thanks for info, but i can't get it working, my l3+ is on firmware 2018. After i followed your instruction and save the upgrade.cgi,

I try to upgrade it to the bliszz firmware, but the same cannot find signature error happened.

I need a firmware update for Z9 mini back to stock with frequencies unlocked this is annoying putty doesn't work for me I don't know what you are talking about how about a file that works I keep being victims to these people on ebay selling a fix that doesn't work I need something that works it was working fine then a pool keep reseting and my fan was waking me up so I thought I would upgrade the firmware sure enough  installed a asshole that puts " Balance " there and annoys people.  Grow up bitmain?  Grow up ebay?  Send me a file that works not sabatoges me and stabs me in the back.  ha ha ha ha I thought that was a japanese trait.

[efudd]

SD based install. instructions linked from https://releases.broked.net

-j

[antminerguruguy]

SD based install. instructions linked from https://releases.broked.net

-j

Ok I'll go to bestbuy and get a SD card but if this doesn't work Im warning you in advance I will drop one.

[P4ndoraBox]

Does that method work with the end of july firmware for S9 ?

Thx.

[soowooo]

no more possible to install blissz firmware on a updated l3+ july 2019 firmware.. , System Upgrade Failed - Cannot Find Signature!!! no putty ssh no more

[bg17aw]

Years later, this topic helped me! Thanks!
SSH and vi needed to be able to update L3+ to nicehash firmware

[oxlithiumxo]

I have a L3++ that has the signature not found issue. It is the most recent firmware from bitmain as of today, so it blocks the SSH. I am ready to do the SD card option but can not find the instructions or the download for it. Any help would be appreciated.

[downlowden]

I used this method on a used L3+ I just got off eBay.  Great instructions, thanks for laying it out.

I'm having the same issues but it's not working for me. Can you help me with one? Happy to help out wherever I can (e.g. free Blissz software for anyone or other items).