BIG-IP not passing large HTTP get requests

Hi there,

I recently created a L4 Performance Virtual Server to simply pass traffic through to a web server. According to the guys that support the application hosted on the web server, the client sends large GET requests that are quite often blocked by reverse proxies. When we take the BIG-IP out of the equation the content on the page is displayed OK.

From the client perspective I can telnet to the web server on TCP 443 OK.

What would be the best way to troubleshoot this issue? Packet Capture? Logs?

-Brett