Hi Joel,

You're using third-party server software based on a very old version of VNC,
so the obvious suggestion would be to upgrade to the latest standard VNC
server release.

Cheers,

Wez @ RealVNC Ltd


> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
> Sent: 22 April 2007 14:23
> To: [email protected]
> Subject: too many authentication errors
> 
> I've been using VNC happily for for many years now, with a Xvnc server
> (Xvnc version 3.3.3r2+tight1.1p9) and a variety of clients, most
> recently RealVNC 4.1.2
> 
> Last week, I found I could no longer connect, because of "too many
> authentication errors."  It seems that someone has been trying, so far
> unsuccessfully, to break into my Xvnc server.
> 
> My understanding what that further attempts were supposed to be
> blocked only from the malicious IP, but, in fact, all attempts to
> access to th server were blocked.
> 
> This looks like an unbelievably easy DOS attack on VNC.
> 
> Does anyone have any suggestions?  I've taken my VNC server off-line
> for now, but what a nuisance....
> 
> Many thanks.
> 
> -Joel
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