Why is Domino LDAP sending Reset the connection bit?

Hello

Domino server 8.5 was installed on SLES10 SP2.

Domino runs LDAP service. Aproximately once an hour LDAP service sends RST (Reset the connection flag) instead of answering.

You can se that 77.240.248.245 questions LDAP service, then 77.240.248.252 answers “R” .

08:42:01.671760 IP 77.240.248.245.48442 > 77.240.248.252.389: P 3465:3733(268) ack 202 win 4640 <nop,nop,timestamp 340183132 811517759>

E…@.x@.@…lM…M…:…$.P… %)…

.F.\0^.?0…c…o=ecdl

08:42:01.671791 IP 77.240.248.252.389 > 77.240.248.245.48442: R 614551795:614551795(0) win 0

E…(…@.@…M…M…:$.P…P…

Domino console provides no error. Futher LDAP queries are served as expected.

LDAP load is really small. Domino server has some 20-30 users and LDAP service is servicing ldap queries for antispam server.

Any ideas?

How to get into the problem?

Regards

Ramunas