Dmitry Krasov via FreeIPA-users wrote:
> Hello. Trying to enroll Ubuntu 24.04 to domain, but it says "certificate 
> verify failed: Hostname mismatch, certificate is not valid for 
> 'ipa2.dom.loc'. (_ssl.c :1000)"
> But when I trying ipa web adress via browser it's seems fine. It's selfsigned 
> like always, but date and name are fine. And just recently I have 
> successfully added another one host
> How can I fix it? Maybe I can disable certificate checking somehow, just for 
> start?
> 
> 
> sudo ipa-client-install --hostname dit-ntb-spc39-1797875.dom.loc 
> --server=ipa2.dom.loc --enable-dns-updates --domain dom.loc --mkhomedir -p 
> admin -w Password --force-join
> 
> This program will set up IPA client.
> 
> Version 4.11.1
> 
>  
> 
> WARNING: conflicting time&date synchronization service 'ntp' will be disabled 
> in favor of chronyd
> 
>  
> 
> Using existing certificate '/etc/ipa/ca.crt'.
> 
> Autodiscovery of servers for failover cannot work with this configuration.
> 
> If you proceed with the installation, services will be configured to always 
> access the discovered server for all operations and will not fail over to 
> other servers in case of failure.
> 
> Proceed with fixed values and no DNS discovery? [no]: y
> 
> Do you want to configure chrony with NTP server or pool address? [no]:
> 
> Client hostname: dit-ntb-spc39-1797875.dom.loc
> 
> Realm: dom.loc
> 
> DNS Domain: dom.loc
> 
> IPA Server: ipa2.dom.loc
> 
> BaseDN: dc=l3874,dc=ru
> 
>  
> 
> Continue to configure the system with these values? [no]: y
> 
> Removed old keys for realm dom.loc from /etc/krb5.keytab
> 
> Synchronizing time
> 
> Configuration of chrony was changed by installer.
> 
> Attempting to sync time with chronyc.
> 
> Time synchronization was successful.
> 
> Enrolled in IPA realm dom.loc
> 
> Created /etc/ipa/default.conf
> 
> Domain dom.loc is already configured in existing SSSD config, creating a new 
> one.
> 
> The old /etc/sssd/sssd.conf is backed up and will be restored during 
> uninstall.
> 
> Configured /etc/sssd/sssd.conf
> 
> Connection to https://ipa2.dom.loc/ipa/json failed with [SSL: 
> CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, 
> certificate is not valid for 'ipa2.dom.loc'. (_ssl.c :1000)
> 
> Connection to https://ipa.dom.loc/ipa/json failed with [SSL: 
> CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, 
> certificate is not valid for 'ipa.dom.loc'. (_ssl.c:1000)
> 
> cannot connect to 'любой из настроенных серверов': 
> https://ipa2.dom.loc/ipa/json, https://ipa.dom.loc/ipa/json
> 
> The ipa-client-install command failed. See /var/log/ipaclient-install.log for 
> more information
> 

There is no option to disable cert validation.

On the IPA server you can see what names it will answer for in this output:

# openssl x509 -noout -in /var/lib/ipa/certs/httpd.crt -ext subjectAltName

rob

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