I am seeing extreme slowness for all users, when they first login and when they first use sudo.  They may be related, but I'm currently focusing on the sudo-slowness, because it is easier to repeat, and because the user's name is hard-coded in the sudoers file.  I can reproduce the problem using:

    $ sudo sss_cache --groups && time sudo echo hello && time sudo echo hello
    Thu Dec  5 11:56:38 PM UTC 2024
    hello

    real    5m3.852s
    user    0m0.007s
    sys     0m0.022s
    hello

    real    0m0.030s
    user    0m0.007s
    sys     0m0.010s

I don't understand why this should take so long, since the user's name is hard-coded in sudoers.  I expect an immediate response, similar to what I see after results are cached for subsequent sudo usage.

    $ grep -v -P '(^#|^$)' /etc/sudoers
    Defaults        env_reset
    Defaults        mail_badpass
    Defaults        secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
    Defaults        use_pty
    root    ALL=(ALL:ALL) ALL
    %admin ALL=(ALL) ALL
    %sudo ALL=(ALL) NOPASSWD: ALL
    myuser  ALL=(ALL) NOPASSWD: ALL

I primarily need sssd/ldap for user authentication against an Active Directory server.  I would like to report the user's group memberships, if requested (i.e., `id`), but I don't need that information cached, unless explicitly asked. 

Sudo access should be granted solely from /etc/sudoers. I don't want sssd to have any part in determining sudo restrictions.

My /etc/nsswitch.conf file is:

    $ grep -v -P '(^#|^$)' /etc/nsswitch.conf
    passwd:         files systemd sss
    group:          files systemd sss
    shadow:         files sss
    gshadow:        files
    sudoers:        files
    hosts:          files mdns4_minimal [NOTFOUND=return] dns
    networks:       files
    protocols:      db files
    services:       db files sss
    ethers:         db files
    rpc:            db files
    netgroup:       nis sss
    automount:      sss

I have tried to impose timeouts to prevent these long sudo executions, but clearly, I'm missing something.

My /etc/sss/ssd.conf file is:

    $ grep -v -P '(^#|^$)' /etc/sssd/sssd.conf
    [sssd]
    domains = corp.mycompany.com
    config_file_version = 2
    debug_level = 1
    override_space = _
    [nss]
    enum_cache_timeout = 1
    entry_cache_nowait_percentage = 75
    filter_groups = root, admin, sudo
    filter_users = root
    reconnection_retries = 3
    entry_cache_timeout = 300
    entry_cache_nowait_percentage = 75
    [pam]

    [domain/corp.mycompany.com]
    ldap_search_timeout = 3
    ldap_network_timeout = 3
    ldap_enumeration_search_timeout = 3
    entry_cache_timeout = 600
    entry_cache_nowait_percentage = 75
    entry_cache_user_timeout = 5400
    entry_cache_group_timeout = 5400
    entry_cache_netgroup_timeout = 5400
    ldap_sudo_full_refresh_interval = 0
    ldap_sudo_smart_refresh_interval = 21600
    ldap_sudo_use_host_filter = true
    ldap_sudo_include_netgroups = false
    ldap_sudo_include_regexp = false
    ldap_referrals = False
    enumerate = False
    cache_credentials = true
    override_shell = /bin/bash
    override_homedir = /home/%u
    id_provider = ldap
    access_provider = ldap
    auth_provider = ldap
    chpass_provider = ldap
    ldap_uri = ldaps://adldap.mycompany.com
    ldap_service_port = 636
    ldap_search_base = dc=corp,dc=mycompany,dc=com
    ldap_tls_reqcert = allow
    ldap_id_use_start_tls = true
    ldap_id_mapping = true
    ldap_schema = ad
    ldap_user_search_base = ou=Accounts,dc=corp,dc=mycompany,dc=com
    ldap_group_search_base = dc=corp,dc=mycompany,dc=com
    ldap_user_object_class = user
    ldap_user_name = sAMAccountName
    ldap_user_fullname = displayName
    ldap_user_home_directory = unixHomeDirectory
    ldap_user_principal = userPrincipalName
    ldap_group_object_class = group
    ldap_group_name = cn
    ldap_access_order = expire
    ldap_account_expire_policy = ad
    ldap_default_bind_dn = cn=bindusername,ou=Service Accounts,ou=Accounts,dc=corp,dc=mycompany,dc=com
    ldap_default_authtok_type = password
    ldap_default_authtok = binduserpassword

What am I missing? How can I speed up sudo access?

Thanks in advance for any help you can provide.  :)

(BTW, if you see anything else that I'm configuring sub-optimally, feel free to chime in.)
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