VNC + VPN + ZA-P = Poor Performance?

[A J]

Hi Warren,

I had upgraded the Linksys firmware to 1.40, and saw the links to ZA-P on 
the admin page (192.168.1.1).  However, this looks like it's just a way to 
download either the evaluation or retail software -- product placement, if 
you will.   I didn't get the impression that it would allow an integration 
of the two.  If I'm mistaken, I can uninstall my ZA-P, and try downloading 
via the Linksys path.

Thanks for the suggestion.
AJ


>From: "Farrimond, Warren K (SAIC)" <FarrimWK "at" bp.com>
>Reply-To: vnc-list "at" uk.research.att.com
>To: "'vnc-list "at" uk.research.att.com'" <vnc-list "at" uk.research.att.com>
>Subject: RE: VNC + VPN + ZA-P = Poor Performance?
>Date: Wed, 7 Nov 2001 09:06:47 -0600
>
>If you install the current version of the Linksys firmware (1.40.1), it has
>some hooks for ZA Pro. This might help your performance.
>
>-----Original Message-----
>From: Al Jacoutot [mailto:aj_nc "at" hotmail.com]
>Sent: Wednesday, November 07, 2001 8:30 AM
>To: vnc-list "at" uk.research.att.com
>Subject: VNC + VPN + ZA-P = Poor Performance?
>
>
>Hi,
>
>I searched through the archives, but haven't found anything addressing this
>issue in particular.
>
>First, my setup:
>-- Cable modem into the house.
>-- Linksys BEFSR41 Firewall/Router/NAT/4-Port-Switch
>-- Win98 PC running ZoneAlarm-Pro (abbreviated ZA below) SW Firewall
>-- VNC Viewer ver 3.3.3
>-- Cisco VPN 3000 Client SW running on this PC.
>
>If I run all of the above on my home PC, I can access the office.  Telnet
>and Browser sessions to the office network run fun.   However, if I open a
>VNC Viewer into any VNC Server (one on a Win 2K machine, one on a Red Hat
>7.1 server), the performance is horrendous.  It takes 30 second for the
>initial screen to load; 10-30 second for subsequent screen updates.
>Interestingly, the mouse follows along almost at speed.
>
>If I turn off ZA, VNC Viewer performance is great.   Initial screen load is
>1 second or better.   Interactive response time is virtually instantaneous.
>
>Under ZA, I have the VPN IP address, the office IP range, and my local PC
>loopback IP all declared.   Initially I had to declare the VPN IP and my
>loopback IP just to get the link to run.   Adding the office IP range added
>no performance benefit.
>
>If I set the resolution down to 8 bit (vs the 24 bit setting on the server)
>things get a little better, but still nowhere near the performance level
>when ZA is turned off.
>
>Given that telnet and web sessions work fine regardless of whether ZA is on
>or not, it seems like it's an issue between ZA and VNC only.
>
>Has anyone experienced this?  Any suggestions to remedy the situation?
>
>(I have submitted the same question to ZoneLabs, but I got a form letter
>reply.  I'll have to try again with them.)
>
>Thanks,
>AJ
>
>
>
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