Strange problem with timsieved 2.2.12

[Andrew Morgan]

On Wed, 14 Nov 2007, Lukasz Michalski wrote:

> Hi,
>
> I am observing strange problem with timsieved daemon.
> This is on small mail server running cyrus-imapd 2.2.12.
>
> For most hosts, timsieved does not respond to commands at all. It sits in
> select() and never read any data. Data written at start of daemon is not
> readed to telnet client too.
>
> But I identified two good hosts for which timsieved works ok. This situation
> is perfectly and happens only to timsieved process. Everything else works ok.
>
> I would be grateful for any help, hints org suggestions.
>
> Here is telnet session and strace from bad host. When telnet connects to port
> 2000 strace outputs first line only. Rest of strace is written when I issue
> close command in telnet session.
>
> [root at home ~]# telnet ssl.zork.pl 2000
> Trying 195.66.73.37.2000...
> Connected to black.zork.pl.
> Escape character is '^]'.
> test
> ^]
> telnet> cl

We had a similar behavior occur that turned out to be caused by a 
firewall.  We use a Cisco FWSM.  The culprit was a "fix-up" for the Cisco 
SCCP (Skinny) protocol, which also uses port 2000.  Responses from the 
timsieved server to the sieve client were dropped.  Once we disabled the 
SCCP fix-up, sieve worked normally.

 	Andy