Hi, I've got an issue with my external authentication configuration. I use Apache and the mod_perl modules (AuthenNIS + AuthzNIS + Net-NIS) to authenticate to galaxy with NIS accounts. I have the authentication form when I try to access galaxy web page. But after a successful authentication it seems that the REMOTE_USER variable is not passed to my galaxy instance. I'm connected under "@ example.org" regardless of the authentication account. That's why I think the REMOTE_USER passed to Galaxy is not 'null' but empty. I tested the value of the variable with the following php script: <?PHP foreach($_SERVER as $key_name => $key_value) { print $key_name . " = " . $key_value . "<br>"; } ?> I've got a REMOTE_USER et HTTP_REMOTE_USER with a username value. I don't understand where my problem lies. Here is my galaxy.conf file : Listen 2208 <VirtualHost *:2208> RewriteEngine on DocumentRoot "/path/to/static" <Directory "/path/to/static"> Options +Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny Allow from all AuthType Basic AuthName "Authentifiez vous" PerlAuthenHandler Apache2::AuthenNIS PerlAuthzHandler Apache2::AuthzNIS PerlSetVar AllowAlternateAuth no require valid-user </Directory> RewriteEngine on RewriteRule . - [E=RU:%{LA-U:REMOTE_USER}] RequestHeader set REMOTE_USER %{RU}e RewriteRule ^/galaxy$ /galaxy/ [R] RewriteRule ^/static/style/(.*) /path/to/static/june_2007_style/blue/$1 [L] RewriteRule ^/static/scripts/(.*) /softhpc/galaxy/test/galaxy-master/static/scripts/packed/$1 [L] RewriteRule ^/static/(.*) /path/to/static/$1 [L] RewriteRule ^/favicon.ico /path/to/static/favicon.ico [L] RewriteRule ^/robots.txt /path/to/static/robots.txt [L] RewriteRule ^(.*) http://localhost:2209$1 [P] </VirtualHost> Thanks in advance ! F.T