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Home » Kerio User Forums » Kerio Connect » increase CLOSED LDAPS Sessions (fixed in 7.4.3) (Version 7.4.1 (OS X) CLOSED LDAPS Sessions (fixed in 7.4.3))
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John A.

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Question if others also see this problem (increase off CLOSED ldaps sessions, not vanishing):

Running KerioConnect version 7.4.1 (build 7267) on OS X server 10.6.8
(500 users)

$lsof -i:636

a couple examples from the 161 entry's (still growing):

mailserve 145 root 1469u IPv4 0xffffff80673cb1c8 0t0 TCP mail.example.tst:ldaps->mac-8-26.example.tst:50983 (CLOSED)
mailserve 145 root 1478u IPv4 0xffffff809e409bd8 0t0 TCP mail.example.tst:ldaps->mac-8-26.example.tst:50714 (CLOSED)
mailserve 145 root 1519u IPv4 0xffffff80673db1c8 0t0 TCP mail.example.tst:ldaps->mac-8-26.example.tst:49518 (CLOSED)
mailserve 145 root 1573u IPv4 0xffffff809cf3f7b8 0t0 TCP mail.example.tst:ldaps->mac-8-5.example.tst:52639 (CLOSED)
mailserve 145 root 1579u IPv4 0xffffff809bbe7bd8 0t0 TCP mail.example.tst:ldaps->mac-4-50.example.tst:51934 (CLOSED)
mailserve 145 root 1594u IPv4 0xffffff809bdbbbd8 0t0 TCP mail.example.tst:ldaps->mac-8-95.example.tst:51192 (CLOSED)
mailserve 145 root 1616u IPv4 0xffffff80673f85e8 0t0 TCP mail.example.tst:ldaps->mac-8-88.example.tst:53723 (CLOSED)
mailserve 145 root 1657u IPv4 0xffffff8067477da8 0t0 TCP mail.example.tst:ldaps->mac-8-6.example.tst:53994 (CLOSED)

the amount is every day growing, they stay in CLOSED state and don't vanish
for the other services like imaps / smtps / https no problems (lsof -nP | grep TCP).

When the max is reached, ldap become in active:
Connection attempt to service LDAPS rejected: too many connections (limit)
Offcourse you can increase the limit, but there will be some day a limit Wink

Stopping kerio, will release it, but is not the solution.


[Updated on: Mon, 03 September 2012 09:26]

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Pavel Dobry (Kerio)

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Do you know what LDAP clients are running at these Macs?
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John A.

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Used Clients:

Apple Mail (5.2 and 4.5) {osx 10.7 and 10.6}
AddressBook (6.1.2 and 5.0.3) {osx 10.7 and 10.6}

They query the public folder and there own contact folder. There are no messages at the client. When I look at the client network connections, then it's vanished (so normal behavior).

I just did a query on the public folder, with address book version 6.1.2 with the ldaps protocol, and I still see the connection on kerio server:

mailserve 219 root 265u IPv4 0xffffff804c5e97b8 0t0 TCP mail.example.tst:ldaps->jab.example.tst:54841 (CLOSED)
mailserve 219 root 1627u IPv4 0xffffff80439e1418 0t0 TCP mail.example.tst:ldaps->jab.example.tst:50547 (CLOSED)

On the client, the session is vanished already. (above on the server, you see two different sessions hanging in CLOSED state)

[Updated on: Fri, 22 June 2012 19:12]

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John A.

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The same issue, with version 7.4.2 build 7694
After updating, till now about 2 weeks 104 CLOSED ldaps connections

$lsof -i:636 | grep CLOSED | wc -l
104

(active users, around the 350)

The only solution too kill them is a restart from the server, stopping the service will stop kerio completely, and a restart is needed.

Status: 'awaiting bug fix'
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John A.

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FIXED in release 7.4.3 build 7813 !
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