ZCS 8 FOSS - Web proxy Issues

[sviriyala]

Hi All,

I have a strange issue with Web Proxy. My Config is a Multiserver install on RHEL 6.2 64 bit. Have Web Proxy installed on a separate box. The issue is while I am able to login using web sometimes, at other times (seems quite random) it re-directs the requests directly to the mailbox server. And I am not getting a clue as to when this happens? Isn't the whole idea of proxy that the user doesn't directly connect to the mailbox server? I have been trying to look at the log files (/opt/zimbra/log/ nginx.log & nginx.access.log). No clue.

For exampl:

https://webmail.mydomain.com works fine some times (webmail.mydomain.com) being the web proxy host

and at other times the moment I login it immediately re-directs the url to

https://mailstore1.mydomain.com or https://mailstore2.mydomain.com

This is happening with all accounts, on different PCs. I even tried clearing the cache & other stuff in the browsers, restart the browser etc, still it happens. And at other times it logins perfectly.

Any clue is highly appreciated.

Thanks

[sviriyala]

With no help at all, I further tried to find out some clue the hard way. Tried even packet capture from client side. Eventually this is one thing I noticed.

/opt/zimbra/log/nginx.access.log

I had kept a putty session open on the http proxy server with the following command
#tail -f nginx.access.log

I opened a browser (IE9) & got to the login page: https://webmail.mydomain.com

At this point I marked the last message i the above log file. Then tried to login, and captured all the lines that came in. Later after several unsuccessful logins, waited till I was able to successfully login and then again, captured the output of the log. Then compared the lines. The very first line differs with different http codes as shown below:

Unsuccessful Login:
172.16.7.110 - - [26/Nov/2012:00:27:00 +0530] "POST / HTTP/1.1" 200 1265 "https://webmail.mydomain.com/" "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)"

SUCCESSFUL LOGIN:
172.16.7.110 - - [26/Nov/2012:00:34:07 +0530] "POST / HTTP/1.1" 302 0 "https://webmail.mydomain.com/" "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)"

Notice that during unsuccesful login I get a HTTP code of 200 while during successful login I get HTTP code 302.

Any idea as to why this is happening and what is causing this?

Thanks.

[sviriyala]

So much for my 'debugging' over the past 4/5 days. This seems to be a known issue in Zimbra. Finally found the solution thro a KB article on VMWare site itself. Here is the link:

VMware KB: Web log in through reverse proxy redirects to mailstore

Posting it for the benefit of others who might search/post in the forum.

Regards
--Suri

[Vladimir]

I've just ran into this after an upgrade to 7.2.2

My problem is that the mailstores already have these options set correctly so for me the KB article doesn't really help.