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About reply_body_max_size

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Reading squid.conf.documented for 3.1.9, I see this portion:

TAG: reply_body_max_size     size [acl acl...]
#       This option specifies the maximum size of a reply body. It can be
#       used to prevent users from downloading very large files, such as
#       MP3's and movies. When the reply headers are received, the
#       reply_body_max_size lines are processed, and the first line where
#       all (if any) listed ACLs are true is used as the maximum body size
#       for this reply.
#
#       This size is checked twice. First when we get the reply headers,
#       we check the content-length value.  If the content length value exists
#       and is larger than the allowed size, the request is denied and the
#       user receives an error message that says "the request or reply
#       is too large." If there is no content-length, and the reply
#       size exceeds this limit, the client's connection is just closed
#       and they will receive a partial reply.
#
#       WARNING: downstream caches probably can not detect a partial reply
#       if there is no content-length header, so they will cache
#       partial responses and give them out as hits.  You should NOT
#       use this option if you have downstream caches.
#
# WARNING: A maximum size smaller than the size of squid's error messages
#       will cause an infinite loop and crash squid. Ensure that the smallest
#       non-zero value you use is greater that the maximum header size plus
#       the size of your largest error page.
#
#       If you set this parameter none (the default), there will be
#       no limit imposed.
#
#       Configuration Format is:
#               reply_body_max_size SIZE UNITS [acl ...]
#       ie.
#               reply_body_max_size 10 MB

Now, having the following line causes squid (3.1.9) to grok:

reply_body_max_size 0 KB deny all


squid -k parse gives this:

2011/06/05 21:03:05| aclParseAclList: ACL name 'KB' not found.
FATAL: Bungled squid.conf line 60: reply_body_max_size 0 KB deny all
Squid Cache (Version 3.1.9): Terminated abnormally.
CPU Usage: 0.007 seconds = 0.007 user + 0.000 sys
Maximum Resident Size: 4376 KB
Page faults with physical i/o: 0


Where is the problem?


--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE



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