Axel-Stephane, sorry to take so long to thank you. Your suggestion was close to correct, and led me to the correct answer, for which I am very grateful.
When I tried to implement your solution, I was not able to implement the <Proxy> directive. Some research suggested that I didn't load the mod_proxy module. I'm still getting used to this new Apache 2 version, with it's more restricted default configuration. Adding mod_proxy, via the 'a2enmod proxy' command fixed the whole problem, I think. I never had to load mod_proxy separately before.
Thanks, again, for your help and suggestions, and for the gift of the time and energy you devoted to exploring my problem.
-Kevin Zembower
>>> Axel-Stephane.SMORGRAV@xxxxxxxxxxxxxx 08/25/05 04:16AM >>>
Your problem is not due to mod_rewrite. It is most probably an access control problem.
I "almost" managed to reproduce it by adding the following lines to my test config:
ErrorDocument 403 /docs/FORBIDDEN
<Proxy *>
Deny from all
</Proxy>
What troubles me a little bit is that I do see the rewrite log message "go-ahead with proxy request" in my logs, whereas it does not appear in yours... On the other hand you may have edited the logs you posted.
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (2) init rewrite engine with requested uri /docs/123456
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (3) applying pattern '^/docs/?$' to uri '/docs/123456'
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (3) applying pattern '^/docs/index' to uri '/docs/123456'
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (3) applying pattern '^/docs/sitemap' to uri '/docs/123456'
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (3) applying pattern '^/docsum' to uri '/docs/123456'
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (3) applying pattern '^/docs/([0-9]{6})$' to uri '/docs/123456'
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (2) rewrite /docs/123456 -> http://db.jhuccp.org/dbtw-wpd/exec/dbtwpcgi.exe?BU=http%3A%2F%2Fdb.jhuccp.org%2Fdbtw-wpd%2Fexec%2Fdbtwpcgi.exe&QF0=DocNo%&QI0=123456&TN=Popline&AC=QBE_QUERY&MR=30%DL=1&&RL=1&&RF=LongRecordDisplay&DF=LongRecordDisplay
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (3) split uri=http://db.jhuccp.org/dbtw-wpd/exec/dbtwpcgi.exe?BU=http%3A%2F%2Fdb.jhuccp.org%2Fdbtw-wpd%2Fexec%2Fdbtwpcgi.exe&QF0=DocNo%&QI0=123456&TN=Popline&AC=QBE_QUERY&MR=30%DL=1&&RL=1&&RF=LongRecordDisplay&DF=LongRecordDisplay -> uri=http://db.jhuccp.org/dbtw-wpd/exec/dbtwpcgi.exe, args=BU=http%3A%2F%2Fdb.jhuccp.org%2Fdbtw-wpd%2Fexec%2Fdbtwpcgi.exe&QF0=DocNo%&QI0=123456&TN=Popline&AC=QBE_QUERY&MR=30%DL=1&&RL=1&&RF=LongRecordDisplay&DF=LongRecordDisplay
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (2) forcing proxy-throughput with http://db.jhuccp.org/dbtw-wpd/exec/dbtwpcgi.exe
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#238ec8/initial] (1) go-ahead with proxy request proxy:http://db.jhuccp.org/dbtw-wpd/exec/dbtwpcgi.exe [OK]
150.175.32.163 - - [25/Aug/2005:10:06:37 +0200] [labelle16.foo.bar/sid#16d060][rid#23a680/initial/redir#1] (2) init rewrite engine with requested uri /docs/FORBIDDEN
[...]
I also simplified the rewrite rules a little bit, and un-escaped the proxy URL (to the best of my ability)
RewriteRule ^/docs/?$ /docs/index.html
RewriteRule ^/docs/index - [L] #If this matches, don't do any rewriting
RewriteRule ^/docs/sitemap - [L] #If this matches, don't do any rewriting. For Google sitemap program
RewriteRule ^/docsum - [L] #If this matches, don't do any rewriting
RewriteRule ^/docs/([0-9]{6})$ http://db.jhuccp.org/dbtw-wpd/exec/dbtwpcgi.exe?BU=http://db.jhuccp.org/dbtw-wpd/exec/dbtwpcgi.exe&QF0=DocNo%&QI0=$1&TN=Popline&AC=QBE_QUERY&MR=30%DL=1&&RL=1&&RF=LongRecordDisplay&DF=LongRecordDisplay [P]
RewriteRule ^/docs/[0-9]{4} - [L] #If this matches, don't do any rewriting
RewriteRule .* http://db.jhuccp.org/popinform/basic.html [R,L]
-ascs
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