Willy, thank for the reply.
I did remove some of the information from the log but it was only the public ip numbers, there was no port information. So I presume the port is the same on all requests. I Also made the urls anonymous in the log by specifying www.customera.nl. You did notice a pause. That is correct. The page first shows a list to the user. The first postback is to select one item, that returns the “big” page with different information where more input is gathered. The user then does another post on the same page to continue. This last post is the “big” one that gives trouble. I know I need to get the page to be smaller but it would be nice to find the transmission error too. I checked the server timeouts but they are all above 120 seconds as far as I can find. Using my cell phone and a local wifi connection I also tried to simulate, this took very long but no error. Tomorrow I will try to do this again and also record the haproxy log. My haproxy -vv output is: HA-Proxy version 1.5.4 2014/09/02 Copyright 2000-2014 Willy Tarreau <[email protected]> Build options : TARGET = linux2628 CPU = generic CC = gcc CFLAGS = -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat -security -Werror=format-security -D_FORTIFY_SOURCE=2 OPTIONS = USE_ZLIB=1 USE_OPENSSL=1 USE_PCRE=1 Default settings : maxconn = 2000, bufsize = 16384, maxrewrite = 8192, maxpollevents = 200 Encrypted password support via crypt(3): yes Built with zlib version : 1.2.3.4 Compression algorithms supported : identity, deflate, gzip Built with OpenSSL version : OpenSSL 1.0.1 14 Mar 2012 Running on OpenSSL version : OpenSSL 1.0.1 14 Mar 2012 OpenSSL library supports TLS extensions : yes OpenSSL library supports SNI : yes OpenSSL library supports prefer-server-ciphers : yes Built with PCRE version : 8.12 2011-01-15 PCRE library supports JIT : no (USE_PCRE_JIT not set) Built with transparent proxy support using: IP_TRANSPARENT IPV6_TRANSPARENT IP_F REEBIND Available polling systems : epoll : pref=300, test result OK poll : pref=200, test result OK select : pref=150, test result OK Total: 3 (3 usable), will use epoll. And my basic frontend and relevant backend config is: frontend http bind 0.0.0.0:80 reqadd X-Forwarded-Proto:\ http option httplog capture request header Host len 32 capture request header Referrer len 64 log-format %ci\ [%Tl]\ %b/%s\ %Tq/%Tw/%Tc/%Tr/%Tt\ %ST\ %B\ %CC\ %CS\ %tsc\ %ac/%fc/%bc/%sc/%rc\ %sq/%bq\ %hr\ %r errorfile 408 /dev/null acl acl_ws06 hdr_end(Host) -i customera.nl use_backend bk_ws06 if acl_ws06 default_backend bk_ws01 backend bk_ws06 option httplog option forwardfor server iis05 192.168.30.16:80 Hope this helps. If I need to create a trace please help me with some directions on how to do that. Thank you for the help! Evert
