On 02/03/2011 11:51 AM, Amos Jeffries wrote: > Both your pcap files show that the 303 response headers contains: > > " > > HTTP/1.1 303 See Other > Location: http://157.99.176.25:8080 > Feb 2011 11:51:08 GMT > Content-Length: 0 > > > " > > According to HTTP whitespace un-wrapping rules that makes the URL: > > http://157.99.176.25:8080 Feb 2011 11:51:08 GMT > > > This makes me worried about why Firefox is accepting this. > > That very small 303 reply was broken into no less than 8 TCP fragments > so something in the hardware chain has an extremely small MTU of around > 9 bytes per packet. Thank you for answering so quickly. I'm gonna investigate further with your analysis in mind. Regards, Jean-Baptiste