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On Fri, 5 Oct 2001, mack@xxxxxxxxxxxx wrote:
> On Fri, 5 Oct 2001, Kris Odland wrote:
>
> > Here's whats going on. We are using LVS for load balancing imap servers,
> > we have the tunneling option set up so the individual servers reply to
> > the client.
>
> I don't have an answer, but I do have some more questions..
>
> I assume all the imap realservers are writing to one common filesystem?
Yes, we have a fiber channel array set up and they are all using that for
storage.
>
> > We are seeing a problem if you have your email client set up to copy
> > sent messages to a "Sent" folder on the imap server. The client opens
> > a seperate connection to the imap server for the sent folder.
>
> Is this to the same VIP:port as the first connection?
>
> If it's different, you could be connecting to a different realserver
> than for the first imap connection. Is this a problem?
>
It is trying to use the same port (I think). If it opens a port for sent
mail, say 4444, if you wait long enough the server will close the
connection to this port, but the local client will not realize this and
try to send it to 4444 and it doesnt work.
We can try the ip chains solution posted and see if that does anything.
Is that pretty much the only way around it? It seems like it might have
something to do with how the networking stack is set up in lvs, or how it
handles connection tables or something. Not exactly sure exactly what
though.
Kris
--
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Kris Odland -- ITS Server Group
IACC 242K -- NDSU
(701) 231-9646 Kristoffer_Odland@xxxxxxxxxxxxxx
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