When trying to mirror an intranet site (with proxy and site authentication) I
get Proxy Error 502 Message as follows

HTTrack3.44-1+htsswf+htsjava launched on Wed, 27 Apr 2011 11:13:10 at
http//:FAL\kraviss:xxxxx@gke.gbg.fujitsu.com/Pages/Default.aspx +*.png +*.gif
+*.jpg +*.css +*.js -ad.doubleclick.net/* -mime:application/foobar
(winhttrack -qiC2%Ps2u1%s%uN0%I0p3DaK0H0%kf2A100000%f#f -F IE6 -%F "<!--
Mirrored from %s%s by HTTrack Website Copier/3.x [XR&CO'2010], %s -->" -P
FAL\kraviss:xxxxx@137.172.78.74:8080 -%l "en, en, *"
http//:FAL\kraviss:xxxxx@gke.gbg.fujitsu.com/Pages/Default.aspx -O1 "E:\My Web
Sites\GKE" +*.png +*.gif +*.jpg +*.css +*.js -ad.doubleclick.net/*
-mime:application/foobar )
Information, Warnings and Errors reported for this mirror:
note: the hts-log.txt file, and hts-cache folder, may contain sensitive
information,
 such as username/password authentication for websites mirrored in this
project
 do not share these files/folders if you want these information to remain
private
11:14:38 Error:  "Proxy Error ( No data record is available.  )" (502) after 2
retries at link http/robots.txt (from primary/primary)
11:14:38 Error:  "" (502) after 2 retries at link
http//:FAL/kraviss:xxxxxx@gke.gbg.fujitsu.com/Pages/Default.aspx (from
primary/primary)
11:14:38 Info:  No data seems to have been transfered during this session! :
restoring previous one!

Detailed log is
[0] request for
http//:FAL/kraviss:xxxxx@gke.gbg.fujitsu.com/Pages/Default.aspx:
<<< GET <http://http//:FAL/kraviss:xxxxx@gke.gbg.fujitsu.com/Pages/Default.aspx>
HTTP/1.1
<<< Proxy-Authorization: Basic RkFMXGtyYXZpc3M6VUtpMzh0ZzI3
<<< Connection: Keep-Alive
<<< Host: http
<<< User-Agent: IE6
<<< Accept: image/png, image/jpeg, image/pjpeg, image/x-xbitmap,
image/svg+xml, image/gif;q=0.9, */*;q=0.1
<<< Accept-Language: en, en, *
<<< Accept-Charset: iso-8859-1, iso-8859-*;q=0.9, utf-8;q=0.66, *;q=0.33
<<< Accept-Encoding: gzip, identity;q=0.9


[0] response for
http//:FAL/kraviss:xxxxx@gke.gbg.fujitsu.com/Pages/Default.aspx:
code=502
>>> HTTP/1.1 502 Proxy Error ( No data record is available.  )
>>> Via: 1.1 SYD0364
>>> Connection: close
>>> Proxy-Connection: close
>>> Pragma: no-cache
>>> Cache-Control: no-cache
>>> Content-Type: text/html
>>> Content-Length: 4139  


[1] request for http/robots.txt:
<<< GET <http://http/robots.txt> HTTP/1.1
<<< Proxy-Authorization: Basic RkFMXGtyYXZpc3M6VUtpMzh0ZzI3
<<< Connection: Keep-Alive
<<< Host: http
<<< User-Agent: IE6
<<< Accept: image/png, image/jpeg, image/pjpeg, image/x-xbitmap,
image/svg+xml, image/gif;q=0.9, */*;q=0.1
<<< Accept-Language: en, en, *
<<< Accept-Charset: iso-8859-1, iso-8859-*;q=0.9, utf-8;q=0.66, *;q=0.33
<<< Accept-Encoding: gzip, identity;q=0.9


[1] response for http/robots.txt:
code=502
>>> HTTP/1.1 502 Proxy Error ( No data record is available.  )
>>> Via: 1.1 SYD0364
>>> Connection: close
>>> Proxy-Connection: close
>>> Pragma: no-cache
>>> Cache-Control: no-cache
>>> Content-Type: text/html
>>> Content-Length: 4139