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Firewall settings for Hosted Email Security to work with On-prem solutions

01/06/2021 53 People found this article helpful 198,761 Views

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    Description

    In order for Hosted Email Security (HES) to work with On-prem solutions the Firewall will need the Nat Policies and Access Rules described below.

    Resolution

    Create the following in order of their appearance

    Service Groups
    1. LDAP and LDAPS 389 and 636

    Address Objects

    Create address object for the following Networks


    1. Hosted IP a      173.240.210.0/255.255.255.0
    2. Hosted IP b      173.240.213.0/255.255.255.0

    4. Hosted IP c     173.240.214.0/255.255.255.0
    3. Hosted IP d      204.212.170.0/255.255.255.0


    Here is  sample.

    Image


    The Above mentioned IPs for HES North America. If your are HES Europe tenant. There is only one range you must use


    1.Hosted IP      173.240.221.0/255.255.255.0

    4. Public IP SMTP       (Public IP SMTP)
    5. Private IP SMTP      (Private IP of the SMTP server)
    6. Public IP LDAP       (Public IP LDAP)
    7. Private IP LDAP      (Private IP of the LDAP server)

    Address Groups

    Create an Address Group with the following IP Networks for North America.


    1. Hosted IPs Hosted IP a, Hosted IP b, Hosted IP c Hosted IP d

    Image



    Nat Policies
    for SMTP traffic:

    1. Any Original Public IP Private IP SMTP Original

    Image

    for LDAP traffic:

    2. Any Original Public IP Private IP LDAP+S Original

    Image

    Access rules
    1. Wan Lan Hosted IPs Public IP LDAP+S Allow

    Image
    2. Wan Lan Any Public IP LDAP+S Deny

    Image
    3. Wan Lan Hosted IPs Public IP SMTP Allow

    Image
    4. Wan Lan Any Public IP SMTP Deny

    Image

     

    NOTE:If you have other devices that need to access your LDAP from WAN to LAN outside of the hosted devices you will need to make sure those allow rules are prior to the deny all for LDAP

     

    Related Articles

    • Bandwidth usage and tracking in SonicWall
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    • Configure Guest VLAN in the TZ firewall, for guest users to access Internet only.

    Categories

    • Firewalls > TZ Series > Networking
    • Firewalls > SonicWall NSA Series > Networking
    • Firewalls > SonicWall SuperMassive 9000 Series > Networking
    • Email Security > Hosted Email Security > Network Architecture

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