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Why is the system load on my LDAP server 100% while LDAP lookups time out on my Email Security Gateway?

  • Type: Knowledgebase
  • Date changed: 3 years ago
Solution #00001519

Applies to all LDAP servers and Active Directory when using LDAP lookups with the Email Security Gateway.

If your LDAP server has a consistently high system load, it may be due to the search filters being to broad on your Email Security Gateway. When configuring the LDAP settings on the Email Security Gateway, the Test LDAP lookup near the bottom of the Domains > Edit Domain page should take less than one second. If it is taking too long, you can remove additional search filters from the LDAP Filter field on the same page. If you're using Active Directory, you can also change the LDAP Port to 3268 since connections made on the Global Catalog port generally respond more quickly.

Additional Notes:
For more information on writing custom LDAP filters, see Solution #00001802.

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