Hi, Thanks for the advice about QUERY_STRING. Please allow me to re-state my problem and my current attempt at a solution: I want to rewrite a URL such as: http://www.example.org/myProgram?param1=val1&url=http://cellularlmanagerpp.aliant.net/foo/bar.html to http://www.example.org/myProgram?param1=val1&url=http://erie:9090/foo/bar.html Currently, I'm using the following RewriteRule: RewriteCond %{QUERY_STRING} ^(.*)url=http%3A%2F%2Fcellularmanagerpp%2Ealiant%2Enet(.*)$ RewriteRule ^(.*)$ %3?%1url=http%3A%2F%2Ferie%3A9090%2 My intention is this - the first pattern captured (%1) in RewriteCond will be everything from the start of the query string up to "url" - the second pattern captured (%2) in RewriteCond will be everything in the query string after "aliant.net" - the third pattern captured (%3) in RewriteRule will be everything from the beginning of the URL to the start of the query string Therefore "%3?%1url=http%3A%2F%2Ferie%3A9090%2" should produce the URL I want, but unfortunately it doesn't Once potential problem I can see is that there is no distinction between the use of "%3" to replay the third captured pattern and the use of "%3" in "%3A", to represent the ":" character encoded - should I somehow be escaping the latter? Thanks in Advance, DM Send instant messages to your online friends http://uk.messenger.yahoo.com --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx