Hi,

On Thu, Oct 13, 2022 at 11:04 AM iulian roman via FreeIPA-users <
[email protected]> wrote:

> Hello everybody,
>
> I have a FreeIPA setup with AD trust which works properly. I recently
> noticed that authentication does not work on some freeipa clients which are
> in a firewalled network. All ports to the FreeIPA servers were allowed in
> the firewall. Checking the logs , I observed  that kerberos client on
> freeipa clients does try to connect directly to Active Directory Domain
> Controllers , not only to the KDC in FreeIPA server.
> Can anyone please explain or point to the documentation where it is
> mentioned exactly why do we still need direct connectivity to AD on port 88
> for FreeIPA clients ?
>
> You can refer to this chapter: Ports required for communication between
IdM and AD [1] and: Troubleshooting client access to services in the other
forest [2] which has nice diagrams with the information flow.

HTH,
flo

[1]
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/installing_identity_management/index#ports-required-for-communication-between-idm-and-ad_installing-trust-between-idm-and-ad
[2]
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/installing_identity_management/index#assembly_troubleshooting-client-access-to-services-in-the-other-forest_installing-trust-between-idm-and-ad



> Regards,
> iulian
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