Hello, the problem is, that many clients generate more than 1024 concurrent sockets to the LDAP service which block the remaining incoming sockets. I already do all the possible changes to the server (ulimit, sysctl, etc) without a solution. All the incoming connections stop at the 1024 concurrent sockets. The only solution is restarting slapd. The version of openldap is 2.4.11. In /var/log/syslog I found the following entry: Mar 1 14:45:15 ldap1 slapd[25320]: warning: /etc/hosts.allow, line 19: cannot open /etc/hosts.allow: Too many open files cat /proc/sys/fs/file-max: 203609 cat /proc/<slapd pid>/limits: Max open files 4096 4096 files Regards, Klemens -- Klemens Kittan Systemadministrator Uni-Potsdam, Inst. f. Informatik August-Bebel-Str. 89 14482 Potsdam Tel. : +49-331-9773125 Fax. : +49-331-9773122 eMail : kittan@cs.uni-potsdam.de gpg --recv-keys --keyserver wwwkeys.de.pgp.net 6EA09333
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