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subnet

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Hi everybody,

Allthough I know that kerio Supports Multiple Domains, I expierenced that there are still missing some features, like multiple SMTP relay for multiple domains. Sometimes it bring in some issues Mail failures when you use only one Mail Server.

See attachment
Is it a good Idea

Requirements
-3 Servers
-3 Ip adresses

thanx in advance


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RHarmsen.nl

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Problem is, you can only use one mail adres for sending mail in Kerio Outlook Connector
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generic_penguin

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Arg... I don't like it personally. imagine having to setup every user on all 3 servers and then have alias's and forwarders setup .... and this way would mean all users would have 3 accounts set on there mail program rather than one

What's the purpose of this? If it is a load balancing thing to split up the load on the servers due to amount of users then better way

* Have all server except mail for each domain
* Have a single OD or AD for authentication and bind each mail server to this
* Define on external MX records the external IP of each mail server. And spilt it up so mail for one domain MX10 is server1 while MX10 for another domain is server2
* You could even define MX20 and MX30 for failover
* Now choose what mail server the users will connect to to receive there email. It could be a single server not even receiving email and defined above. (Make sure this server is bound to the same OD or AD domain
* Now the cool stuff. To tell the mail cluster where that mail lives (the server above)

Edit /usr/local/kerio/mailserver/mailserver.cfg

Change <table name="Cluster"> to this on server1

<table name="Cluster">
<variable name="BackendModeEnabled">1</variable>
<variable name="FrontendModeEnabled">1</variable>
<variable name="BackendName">server1</variable>
<variable name="BackendMasterPassword">NUL:some_password</variable>
<variable name="BackendAcl"></variable>
<variable name="SimpleUserLookup">0</variable>
<variable name="MaxFreeBusyBackendRedirects">1</variable>
</table>

Change <table name="Cluster"> to this on server2

<table name="Cluster">
<variable name="BackendModeEnabled">1</variable>
<variable name="FrontendModeEnabled">1</variable>
<variable name="BackendName">server2</variable>
<variable name="BackendMasterPassword">NUL:some_password</variable>
<variable name="BackendAcl"></variable>
<variable name="SimpleUserLookup">0</variable>
<variable name="MaxFreeBusyBackendRedirects">1</variable>
</table>


Change <list name="BackendServer"> to this in both servers {sub the IP's below for the correct IP's on your network}

<list name="BackendServer">
<listitem>
<variable name="Name">server1</variable>
<variable name="Hostname">192.168.1.1</variable>
<variable name="Password">NUL:some_password</variable>
</listitem>
<listitem>
<variable name="Name">server2</variable>
<variable name="Hostname">192.168.2.1</variable>
<variable name="Password">NUL:some_password</variable>
</listitem>
</list>


Now that that is done you need to tell the servers where each mailbox location for each user exists

Edit AD or OD user in add a record "dsAttrTypeNative:kerio-Mail-HomeServer" with a variable of server1 or server2

OR with Kerio 6.6.0+

When adding users on our mail server, Hold down shift+ command and the click the "Edit" button {see pic}

Now if you really want to break up the load more you could add another server that you configure your mail clients to use for sending mail

FYI you can add lots of Cluster, but if you split users mailboxes to different servers those users will only see the free and busy calendars of the users only on that single server

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Pavel Dobry (Kerio)

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I strongly discourage using this highly experimental setup. It is intended only for testing and should not run in production. There is many things that will not work or work differently. Also, this configuration contains extremely high security risk which could lead to data loss or unauthorized access.
I'm serious - do not use it.

[Updated on: Tue, 18 November 2008 14:28]

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generic_penguin

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Hi {Kerio_pdobry}

I have clients that require Clustering for a variety of reasons, without it I could never recommend Kerio over exchange.

Does Kerio have a solution that is "encouraged" ? or can you give me an indication as to a time line for one ?

Kerio suggested the below to me. I was informed of free and busy calendars not working properly or delegation / sharing working within users that sit on different nodes, but that was all

I was unaware of any security risk or data loss...

Is it your suggestion that I revisit these sites?

Thanks

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