Re: Double Encryption?

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Hi Denis,

Considering only the numbers you have provided the amount of data being transferred is not very high. If evenly distributed (which of course it is not), it would come to about 50.568 kilobits per sec from the server to the clients, or 3.37 kilobits/sec for each user.

The above numbers suggest that many users are idle most of the time and/or are not doing much bandwidth-intensive activities.

Have you run continuous pings from each one of the remote offices to the TS? The response times should be both relatively consistent as well as preferrably low, like <100ms.

Have you contacted your VPN appliance vendor to ask them if their device will handle the number of connections as well the throughput without latency? They can assist you with troubleshooting if you suspect the device is the cause of the latency. A modern device can handle the load you described.

Do you have enough outgoing bandwidth to handle the peak bursts of traffic? For example, a user simply doing data entry in a business application may be perfectly happy with 40 kilobits/sec of available bandwidth, but when they print their usage will spike dramatically while the document downloads.

If you do not have enough excess bandwidth to handle the spike the other users will experience slower response.

Is there other traffic like e-mail, web, etc., that could be slowing down the connection?

If you have limited bandwidth it often makes sense to use a traffic shaping device or software to provide a guaranteed minimum to each TS user. That way one user printing a large document will not slow all of the other users.

Many firewalls have the ability to do some sort of bandwidth limitation/quota/priority based on connection/vpn endpoint/protocol/etc.

If you think that printing is the cause of your connection being slow you could consider purchasing a third-party universal printer driver solution. They compress the print jobs down to a fraction of the original plus allow you to limit the amount of TS bandwidth used by printing.

-TP

Denis wrote:
Thanks for your reply.
I've been monitoring bandwidth and my terminal server has sent over
100MB of data to no more than 15 users in a 4.5 hour period this
afternoon. I'm not sure if this is the norm as I have just started
this process. That certainly sounds like quite a bit of data for keystrokes and
mouse clicks to me, though I do not know for certain.
We are set for 8bit video so I can't go any lower than that, nor
would I want to, and there is no audio option available. Printing is
quite common, though the majority of this are forms. Not sure if the
forms print as graphics.
Files are not normally transfered from TS to local systems, though it
does happen occasionally.
Any comments welcome.
Thanks
Denis
.

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