We have an Apache server (Apache 2.2.3 bundled with RHEL 5.1) configured to act as a reverse proxy for OWA2007 which sits inside our internal network. Everything is working fine for the most part -- save for ActiveSync from Palm Treo devices. These fail miserably. I've begun troubleshooting this but am hoping someone out there may have some insight they could share. I found several reference to something like this via Google, but none of the mentioned fixes seemed to work. Since everything is SSL'ized, I've taken a peek at the SSL stream with Wireshark and its SSL decryption options (very slick). I can see that the Treo sends an OPTIONS /Microsoft-Server-ActiveSync request which is proxied along correctly to the IIS server, a resopnse comes back and is transmitted back to the Treo. Subsequently, the Treo sends a: POST /Microsoft-Server-ActiveSync?Cmd=FolderSync&User=... request. This request is never proxied along to the IIS server. Eventually things time out and the Treo gives up. I see the following in the error log: proxy: error reading status line from remote server owaserver proxy: Error reading from remote server returned by /Microsoft-Server-ActiveSync I'll paste portions of my config file here with options I think are relevant. I can post the whole thing later if needed: AddDefaultCharset UTF-8 RequestHeader unset accept-encoding # This is a suggested setting. RequestHeader set Front-End-Https "On" SSLProxyEngine on ProxyRequests off # This is the default setting. Don't require a valid certificate. SSLProxyVerify none # This will preserve the Host: field in the request instead of using the # name in the ProxyPass line. ProxyPreserveHost on # Suggested setting. CacheDisable * RedirectMatch permanent ^/$ https://owaserver/exchange/ RedirectMatch permanent /owa$ https://owaserver/owa/ # Stuff added to troubleshoot ActiveSync Header unset WWW-Authenticate Header set WWW-Authenticate "Basic realm=\"owaserver\"" <Location /Microsoft-Server-ActiveSync> ProxyPass https://owaserver/Microsoft-Server-ActiveSync ProxyPassReverse https://owaserver/Microsoft-Server-ActiveSync SetEnv force-proxy-request-1.0 1 SetEnv proxy-nokeepalive 1 </Location> This config includes a few suggestions I found on the web for the errors I was seeing. None seemed to help. Obviously I should try without the Proxy in the middle -- I am working on doing this, but it will likely take a day or two to get appropriate ports and forwarding configured on our firewalls. Anyone have any thoughts or suggestions? I am running with mod_security, but have disabled it while testing this. SELinux is also enabled on the server, but I have placed it in Permissive mode for the time being as well. TIA, Ray --------------------------------------------------------------------- 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