VNC on Iburst

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mlungu1

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Hi guys,

I use Iburst in one location and ADSL in two others (No ADSL available in the one, otherwise I would have ditched iburst within 2 days). I use VNC to connect
to the various sites. The iburst site in 80 of the cases lets me in and then I get disconnected within 10 seconds. Try again and the same will happen, until after 5 or 6 times I may be lucky and stay on. Any ideas why? Also, the VNC connection is incredibly slow unlike on ADSL? Reasons for that?

Tks a lot
 
There's a similar problem, not with vnc but with unc access to another iBurst user. It is unusably slow, why I dont know either. I was also hoping that vnc would be running well enough to help my Dad in CPT (he's 64) with PC problems and questions. Together with Skype, the combination will be a support organisation's dream.
 
Port shaping/prioritization

I had the same problem with SSH and SSL. It has something to do with their port shaping and prioritization. I think you will have to contact them and tell them that the VNC ports are also used for business purposes so that they might rank them higher on their system, else you will never be able to use them during business hours.
 
The new old-rsa isp disease - give people bandwidth but limit their productivity.
I experience exactly the same symptoms with voip. All advice I can give is to change all your port configurations. Try vnc on ports like 80 and 443 - personally I have not tried it yet.

I am sure telkom and iBurst read these forums very carefully in order to stay ahead on any new disruptive ideas.
 
I would be surprised if they do much port shaping on local traffic? But I have not specifically looked at that.

But I do wonder if this problem is not related to MTU size?
See http://www.iburst.co.za/faq.php
"How can my MTU settings in some cases improve iBurst performance?"

......improve is an understatement, because sometimes if firewalls block path mtu discovery icmp messages you get no connection at all unless you drop the mtu size.
 
asmith said:
I would be surprised if they do much port shaping on local traffic?...
Click to expand...
I would be surprised if WBS made any sort of distinction between local & non-local traffic, where local can mean intra-SA-traffic or intra-iBurst-traffic.

I would also be surprised if WBS did not decide to route all intra-iBurst-traffic in such a way that it uses up your bandwidth so you are then forced to purchase more, which IMO is totally wrong, but I expect this from WBS.
 
Most of the bandwidth shaping devices used by ISPs are applied on their international links, not their local ones. WBS could be different, I dont know for sure. But yes, like Telkom, all your traffic does count towards the cap.
 
WBS shape everything except iburst to iburst traffic, but I hear that might be shaped soon. Although i'd love to see thier firewall rules for shaping because ever since the problems started it has been all over the place, capped or not.
 
100 % RRIGHT about the port shapping, I had issue login to a server, so i decided to switch off and try dial up and I could login and change the port again :((..

PORT SHAPPING, you are right!


hexium said:
I had the same problem with SSH and SSL. It has something to do with their port shaping and prioritization. I think you will have to contact them and tell them that the VNC ports are also used for business purposes so that they might rank them higher on their system, else you will never be able to use them during business hours.
Click to expand...
 
hi Speedfreak,

I checked, I'm using RealVNC 4.0. Will download the latest version and check. Tks for that!
 
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