How to troubleshoot very sluggish connection with VNC

How to troubleshoot very sluggish connection with VNC

Postby darkcyber » 2011-03-21 15:40

I have Ultra VNC 1.0.8.2 installed on my home and office computers. I can connect from my home to my office computers and it is close to real time in using the remote computer. But when I connect from my office to my home it is very, very sluggish. Sometimes it may take 20 - 40 seconds for the screen to change or update. It is very frustrating to say the least.

Does anyone have any clue of what I can check to get this working correctly?

Both places have 6 meg up and 768k down DSL. Both locations use a Linksys Wireles router, but all desktop computers are hard wired via CAT6. My office computers are just on a small LAN using that wireless Linksys router and a gigabit switch, same for home. I use Commodo Firewall on my personal office pc and home pc. My other office pc's run Zone Alarm, but again, I have not problems connecting to my office computers.

The only difference I can think of is my office has a static public IP address, where my house has a dynamic IP address. I use NO-IP to route to my server...e.g. xxxxxxx.zapto.org:5900. could that make the difference?

What are the optimized settings for making the fastest connection incoming to a Ultra VNC server pc?
Last edited by darkcyber on 2011-03-21 15:43, edited 1 time in total.
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Re: How to troubleshoot very sluggish connection with VNC

Postby redge » 2011-03-21 21:54

best settings for ultravnc server with system hook on vista/7 over LAN
system hook (new) = SCHook.dll (fast) if exist, it used

if not exist, it use old one.
system hook (old) = vnchooks.dll (slow)

winvnc ... properties (not admin properties)
valid only these box.
Properties
[v] Poll Fullscreen
[_] Poll Forground [_] Poll Console Window Only
[_] Poll Window Under Cursor [_] Poll On event Only
[v] System Hookdll
[_] Video driver
[_] Low accuracy
UltraVNC 1.0.9.6.1 (built 20110518)
OS Win: xp home + vista business + 7 home
only experienced user, not developer
redge
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Re: How to troubleshoot very sluggish connection with VNC

Postby darkcyber » 2011-03-22 13:18

Thanks will check those out.
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Posts: 6
Joined: 2010-12-01 14:54


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