We were experiencing the same issue with GroupWise 8 WebAccess running on OES2 Linux. Our users were unable to open attachments using Internet Explorer 7 or 8 if Webacc is secured with SSL. The users received the IE error "Internet Explorer cannot download document xxxxx.xxx from 172.x.x.x. Internet Explorer was not able to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later."
The fix is the same as Jason's original but with the files and their locations updated.
- First, edit the apache2 file (in /etc/sysconfig/) and add "headers" to the "APACHE_MODULES=" line. Restart Apache. Additions are added without quotes.
This loads the Apache headers module, which needs to be loaded for the fix to function. If this does not load Apache properly, you can try adding "LoadModule headers_module /usr/lib/apache2/mod_headers.so" close to the beginning of the gw.conf file (use this line for 32-bit linux). If you are running 64-bit Linux, use this line - "LoadModule headers_module /usr/lib64/apache2/mod_headers.so". The lines are added without quotes.
- Next, edit /etc/opt/novell/httpd/conf.d/gw.conf and add the following lines to the end of the file:
# Remove the Pragma: no-cache header to allow IE to download attachments. Header unset Pragma