Hi You can write a Destination NAT with the source IP address as the 10 IP adresses, the source zone as "untrust", the destination address with the public IP address of the ldap server, the destination zone as "untrust", service as 636 under the original packet section. Under the translated packet section, click on the check box of the "destination address translation" and give the private IP address of the ldap server. Write a corresponding security rule with the source IP address as these 10 IP addresses, the source zone as "untrust", the destination IP address as the "public IP address of the server", the destination zone as "trust ( or DMZ, where the server is located), application = LDAP, service =any, and action= allow. Best regards, Karthik
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