Hi, I have a very simple setup: Apache back-end server running behind Apache reverse proxy server. Using 2.2.21 and running on Windows XP. Generally, it is working as expected - traffic reaching back-end via proxy and responses from back-end server returning to the client. Basic and Digest authentication working fine (based on AuthType value) The problem: When I send wrong credentials, proxy server replies with error 401 instead of 407, and sending "Authentication" header instead of "Proxy-Authentication" header. Below the changes I added to default configuration file: -------------- LoadModule auth_digest_module modules/mod_auth_digest.so LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_http_module modules/mod_proxy_http.so LoadModule ssl_module modules/mod_ssl.so ProxyRequests off <Location /mirror/1/> AuthType Basic AuthDigestDomain / AuthDigestAlgorithm MD5 AuthDigestNcCheck Off AuthName "WS Group@ipoffice" AuthUserFile C:/pwd.txt Require valid-user ProxyPass http://135.20.77.88/ ProxyPassReverse http://135.20.77.88/ </Location> Include conf/extra/httpd-ssl.conf -------------- Any ideas, suggestions would be greatly appretiated. Thank you. --------------------------------------------------------------------- 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