Alok, Sorry have been out of the office for a while.
You could try increasing the clitimeout and srctimeout values in your defaults section. These values are ninety and one hundred and twenty seconds respectively. My guess is that tcpka has no effect on "activity" from haproxy's point of view as this tcp traffic would be generated by haproxy itself. Also, after seeing your config, I realize why I was confused. I load balance FTP as well, but I ONLY load balance the command channel via haproxy. The data channels are handled directly by NAT rules. I wrote up my method here: http://ben.timby.com/?page_id=210 The nice thing about this method is that haproxy is still able to distribute load pretty evenly by "user session" not by individual connection. Also, the heavy lifting of transferring large files is then handled in the kernel by netfilter rather than by haproxy. Additionally this means that time outs enforced by haproxy only apply to the command channel, and do not affect the data channels.
