[K12OSN] OT: quote on file / mail server
mrjohnlucas at gmail.com
Thu Jun 28 12:07:23 UTC 2007
On Thursday 28 June 2007 07:25, Rob Owens wrote:
> Our office in the UK is getting a new server to handle file shares and
> email. They are planning to go the Windows route, but I'd like to find
> out how much it would cost for a comparable Linux-based system.
> The hardware has already been picked out, so I'm only requesting quotes
> from you guys on the labor involved in setting up the software.
> There are 20-30 users at this office. They currently use Active
> Directory, and they would probably prefer to keep it that way (it's
> running on a different server). I'd be interested in hearing proposals
> to replace it, though.
> My preferred distro would probably be either CentOS 5 or Debian. (Due
> to the long-term support). But I am open to suggestions. GUI tools to
> manage the email accounts would be a plus, in order to break in any
> admins who are new to Linux. (I will be the primary admin, but I need
> somebody to be my backup).
> The email server sends and receives email to/from another mail server
> which is controlled by the parent company. It will not be exposed
> directly to the internet. It does not require anti-spam measures, since
> the parent company's server handles that.
> Please let me know how much you guys think this should cost, even if you
> don't want to do the work yourself. If you are interested in doing the
> work, please let me know that as well.
> I'm looking forward to hearing your suggestions.
I can't give you a quote, but perhaps I can suggest an approach. You need to
decide on a strategy.
There are probably several ways to accomplish what you want, but you first
need to state your needs more precisely:
- what email clients do you intend to support?
- are there other "groupware" (beyond email) needs?
- how flexible is your AD (Active Directory) admin?
What I might do if *only* email is required and there were some freedom of
choice of MUA (Mail User Agent):
- extend AD to support Posix/Unix LDAP schema
- set up CentOS (my choice) to authenticate via LDAP via AD
- install/configure Postfix to use LDAP (from AD)
- install Dovecot (IMAP server)
- modify imap pam configuration to add "pam_mkhomedir.so"
This would allow the use of any IMAP email client (KMail, Thunderbird,
Evolution, Outlook Express, Squirrelmail etc.). All user creation would be
handled in AD.
I would also add "clamsmtp" to the Postfix configuration to use "clamav"
anti-virus scanning. "Defense in depth" is a good idea, it doesn't hurt to
run the mail through more than one scanner. The more diversity in scanners,
the less likely a single virus will get past all of them.
The single largest potential obstacle to this approach is to get the AD admin
to modify the AD configuration to support Posix/Unix LDAP schema. If you
can't get them to do this, then this approach is a non-starter. The steps
aren't difficult and are covered step-by-step in chapter 9 of "LDAP System
Administration" by Gerald Carter. This is a political, rather than a
One final thought: Do you need to run your own mail host? You might be able to
use one already running within your organization *or* you might find the
moderate expense of using "Google Apps" useful. Either approach would
eliminate the expense of running/administering/upgrading another server.
"History doesn't repeat itself; at best it rhymes."
- Mark Twain
| John Lucas MrJohnLucas at gmail.com |
| St. Thomas, VI 00802 http://mrjohnlucas.googlepages.com/ |
| 18.3°N, 65°W AST (UTC-4) |
More information about the K12OSN