I have a very odd issue with both realVNC and tightVNC. I have been succesfully
tunnelling into my work PC from home for some time across the internet. I then
decided to tryout tightVNC to see if the compression gives any significant performance
benefit. After installing this, (which maybe coincidence here, I dont know), I have
been unable to establish a VNC session. I have tried all four combinations or real
and tight VNC, client and server. All of which fail.
I have run snoops at the server end and this is what I see:
server sends RFB 003.003
client sends RFB 003.003
server sends 4 bytes indicating security model "0002" (VNC authentication mode)
server sends 16byte challenge
client sends 16byte response (challenge DES encrypted with password).
server sends 4 byte response "0000" indicating authentication pass.
client sends 1 byte "0" indicating do not share desktop (I think)
server sends FIN
followed by client FIN
I cannot understand what is going wrong, ie why the VNC server decides to terminate
the connection mid way through the handshake after a successful authentication.
Nothing has changed other than me installing tightVNC as well as the already installed
realVNC. I can connect fine across the LAN using any of the four combinations of
tightVNC and realVNC server/client. Am I suffering from a synchronisation issue here
that only occurs when connecting from more remote locations.
I have switched on logging at the server but cannot view the logs until later this
week.
Any useful advice would be gratefully received.
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