Re: Had it stable, but broke after system refresh

OK - after a few hours sleep... I'm wondering if its uw-imap at all, 
although I'm clueless what else it could be.

As I mentioned earlier, squirrelmail is working fine.  It is using a 
ssl/tls connection, which shows as an imaps connection spawned by 
xinetd.  That connection, however, is from 127.0.0.1. Thunderbird is 
connection from 10.184.155.0/24 (depending on which family members 
machine is trying).  We also see imaps being started via xinetd for 
those connection, but they timeout after 30 seconds.

This was occurring before I enabled any firewalling and yes, xinetd is 
enabled for my 10. subnet (clearing, since imaps is spawning).

So... when I login from squirrelmail I see in /var/log/mail.log:

imapd[2911]: Login user=kevinc host=localhost.localdomain [127.0.0.1]
imapd[2911]: Logout user=kevinc host=localhost.localdomain [127.0.0.1]

and in /var/log/messages:

xinetd[2739]: START: imaps pid=2911 from=127.0.0.1
xinetd[2739]: EXIT: imaps status=0 pid=2911 duration=13(sec)

When I try, and fail, from Thunderbird I see in /var/log/mail.log:

  imapd[2919]: Unexpected client disconnect, while reading line user=??? 
host=UNKNOWN

and in /var/log/messages:

xinetd[2739]: START: imaps pid=2919 from=10.184.155.208
xinetd[2739]: EXIT: imaps status=1 pid=2919 duration=30(sec)

Please share your thoughts... I'm at my wits end.

For instance:  is there anyway to increase the logging level within 
uw-imap to help determine whats going on?

Thanks in advance,

Kevin

On 10/3/2012 3:59 AM, Yiorgos Adamopoulos wrote:
> On Wed, Oct 3, 2012 at 11:50 AM, Kevin Carpenter
> <[email protected]> wrote:
>> Basically, its looking like its connecting but not hand shaking right.
> If you tcpdump and it only does the three way hand shake and then it
> waits "forever" (until timeout) then it is most likely a TCP window
> scaling issue. Check your MTUs also and set it to 500 just in case.
> The weirdest of this behavir has happened to me among two servers on
> the same switch where everything was working except sqlplus between
> them.
>

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