some isps have a proxy server doing caching on port 80. if your
traffic is going through the isps proxy server then that will
introduce lots of latency. happened to me a couple of times.

sai

On 7/26/05, Chris Buechler <cbuechler at gmail dot com> wrote:
> On 7/25/05, Jared Armstrong <jarmstrong at woh dot rr dot com> wrote:
> > If it is a general performance issue; how do I start to correct it?
> >
> 
> well if you're not getting very good throughput on typical transfers,
> like downloads or what not, I'd start looking for performance issues. 
> First and most common is a duplex mismatch.  from there, I'd start
> looking at logs and other things.  Doesn't sound like performance is a
> problem in general though, or else your RDP over VPN wouldn't work
> well.
> 
> 
> >  I have
> > traffic shaping disabled, and have only added rules to try and help the
> > citrix connection. What other items should I look at changing to fix the
> > performance issue?
> > 
> 
> I wouldn't have added any rules, the default is fine.  
> 
> 
> > Fromw hat I understand citrix uses tcp/udp on port 80 for firewall
> reasons
> > compatibility. However it looks like it might be denying these packets
> due
> > to packet length.
> > 
> 
> No, ICA uses TCP 1494 unless you've specifically changed that, or
> you're running over the web interface.
> 
> 
> > 07:20:28.518829 tx0 @0:11 b xx.xx.xx.xx,80 -> 192.168.254.100,2536 PR tcp
> > len 20 40 -AF IN
> > 
> 
> That actually to or from your Citrix server?  Looks like something
> that got cut off from the state table before the connection was really
> closed.  shouldn't be a problem though, it happens periodically.
> 
> -Chris
> 
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