distinguish between Citrix client and any browser

Hi Ethereal,

You should be able to trigger an event based on the User-Agent contained within the HTTP::header, but I would suggest creating an iRule that would just monitor the incoming User-Agents at first (so that you can catch all of the User-Agents that you do not want to block and use the results to make an exclusion list).

Example: CitrixReciever

You could start with something like this:

 
when HTTP_REQUEST {
switch -glob [HTTP::header User-Agent] {
"*MSIE 7.0*" -
"*MSIE 6.0*" -
"*MSIE 5.*" -
"*MSIE 4.*" -
"*Safari*" -
"*Firefox*" -
"*MSRPC*" {
log local0. "Known Browsers to eventuall block."
}
"*CitrixReciever*" {
log local0. "Known Citrix Client"
}
default {
log local0. "Unkown User-Agent: [HTTP::header User-Agent]"
}
}
}

After you have logged enough you can change the logging behavior to redirect, blocking, reject, drop or whatever action you like.

I would also suggest these as additional reading. They discuss using the User-Agent as well:

Split out clients using the Citrix Receiver w/ iRule

Redirect based on user browser (mobile)

Hope this helps.