Thanks for the suggestion. I don't think that's what's going on though - I examined CPU/RAM usage. While doing a VNC screen refresh with zonealarm enabled there is still tons of free RAM and the CPU was always at least 60% idle (the ZoneAlarm processes took about 8% CPU and VNC about 15%). So it doesn't seem to be overstretching the CPU at all. Without zonealarm running VNC only consumed slightly higher % CPU (less than 20%).
seb On Sat, 29 Sep 2001, Glenn Mabbutt wrote: > Although I personally haven't used ZoneAlarm, a general suggestion is that > VNC (and most "remote control" apps) are fairly processor/RAM intensive. By > the description, I'm assuming the Win98 box has VNC and ZoneAlarm. I would > suggest finding a shareware prog that will let you monitor CPU/RAM usage > (they exist, just can't remember a name off-hand), and then try it with > ZoneAlarm enabled/disabled. My hunch is that ZoneAlarm is simply putting > the processor "over the edge" in terms of usage, as it's examining every > packet that leaves/enters the box. > > -----Original Message----- > From: Seb Wills [mailto:[EMAIL PROTECTED]] > Sent: Friday, September 28, 2001 11:08 AM > To: [EMAIL PROTECTED] > Subject: VNC and Zonealarm > > > I use VNC between two machines on a LAN (the client being a Win98 > machine). Normally, VNC is highly responsive, and can do a full screen > refresh in less than a second. > > If I enable ZoneAlarm (a free personal firewall which seems to be > generally fairly highly regarded) on the client machine, VNC becomes > unusably slow - it can barely keep up with moving the cursor around, and a > full refresh takes 10s of seconds. > > Initially I assumed ZoneAlarm must just slow down all traffic a heck of a > lot. But if I FTP a 5Mb file between two local machines, ZoneAlarm makes > negligible difference to the transfer rate (433k/s instead of 466k/s). > > Can anyone suggest why ZoneAlarm is particularly affecting VNC performance > and how to get round this (other than turning off ZoneAlarm when I use > VNC)? > > Thanks > > seb > --------------------------------------------------------------------- > To unsubscribe, mail [EMAIL PROTECTED] with the line: > 'unsubscribe vnc-list' in the message BODY > See also: http://www.uk.research.att.com/vnc/intouch.html > --------------------------------------------------------------------- > --------------------------------------------------------------------- > To unsubscribe, mail [EMAIL PROTECTED] with the line: > 'unsubscribe vnc-list' in the message BODY > See also: http://www.uk.research.att.com/vnc/intouch.html > --------------------------------------------------------------------- --------------------------------------------------------------------- To unsubscribe, mail [EMAIL PROTECTED] with the line: 'unsubscribe vnc-list' in the message BODY See also: http://www.uk.research.att.com/vnc/intouch.html ---------------------------------------------------------------------
