password lentgh

burzek · Post by **burzek** » 2016-02-12 14:10

Hi,

Regarding version 1.2.1.0, it seems that I have come to a problem with the vnc passworld length.

I had a user with a 9 character password length, I do not remember which version he was using before I upgraded it to version 1.2.1.0.
Now, whenever I try to connect the user, I can not enter more than 8 letters to vncviewer.
I guess winvnc is making viewer to get only 8 characters.
However, I can not even login with the first 8 characters I type.
Guess I need to re-enter a new password to the server.

Why this limitation came to vnc, using longer passwords should be more safe...
I guess it has been around something but I did not notice?
Please advise what is the latest vnc server supports password lentgh more than 8 characters...

Best Regards,
Burzek

rcooke · Post by **rcooke** » 2016-02-12 21:34

The original VNC protocol only allows 8 characters. I always wondered if it was somehow tied to the old DOS file length limitations...

Normally, it just ignores anything given or entered past that.

To use nice, safe, long passwords, enable the encryption plugin. The settings window for the plugin has two boxes where you can enter just about anything you like.

When a plugin is enabled and a password is entered, they supersede the passwords entered in the main dialog.

burzek · Post by **burzek** » 2016-02-13 07:30

However, I was able to use ultravnc with passwords longer than 8 characters. I really did.
I will look into this more because ultravnc was supporting longer passwords, I will try to find after which version this problem came to happen.
I have never used encryption plugin , so the support was existing.

I hope it is brought back in future releases.

rcooke · Post by **rcooke** » 2016-02-13 18:13

burzek wrote:However, I was able to use ultravnc with passwords longer than 8 characters. I really did.
I will look into this more because ultravnc was supporting longer passwords, I will try to find after which version this problem came to happen.
I have never used encryption plugin , so the support was existing.

I hope it is brought back in future releases.

Ah, maybe you were using the OS native authentication? I forgot about that (never used it). Its documented in the first few pages here:
http://www.uvnc.eu/download/1210/server_options.pdf

IF you were using the OS user accounts, then you would not have had that 8-char limit.

Post by **Rudi De Vos** » 2016-02-14 19:55

2 ways

1) mslogon
user/passwd then passwd can be 32chars
But never use this without encryption... user/passwd need to be send to the server

2)** encryption plugin and set passphrase
The passphrase replace the vnc passwd , you can make a 128 char passwd if you want.

You can even make it more secure by generating a key.
Then only a viewer with the key in his vnc folder is able to connect

UltraVNC

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