Why is sudo very slow (more than 30minutes) to display initial password prompt for a domain account?

Sean Holm

4/8/23, 9:27 AM

I am hoping someone can help me figure out why 'sudo' takes longer than 30mins (on average) to display the initial password prompt when using a domain account.

This problem occurs even after a reboot, but it works fine when using a local account.

quick summary:

I have 3 brand new Linux VMs running in a VMware vSphere 6.7 environment -> problem occurs on all of them
each VM was built using the Ubuntu 18.04 LTS server iso
all package updates have been applied.
each VM is joined to a windows active directory domain
the windows user account is a member of sudo'ers
there is no other software installed (basically, it's just the bare minimum packages required to join with the Windows AD domain)

Things I have tried thus far:

the '/etc/hosts' file contains an entry for 127.0.1.1 and includes the hostname and fully qualified name (all lowercase), e.g. '127.0.1.1 myserver myserver.domain'
checked / confirmed hostname in terminal matches exactly
checked DNS -> it seems fine? It has 3 nameservers configured - all are valid.
deleted the homedir of the domain user account and let it be recreated by PAM auth
set "UseDNS no" in '/etc/ssh/sshd_config'

Please advise any troubleshooting steps that I should try?

Thanks!

0 + 0

linux

ssh

sudo

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Why is sudo very slow (more than 30minutes) to display initial password prompt for a domain account?

TH: เหตุใด sudo จึงช้ามาก (มากกว่า 30 นาที) ในการแสดงรหัสผ่านเริ่มต้นสำหรับบัญชีโดเมน

RO: De ce sudo este foarte lent (mai mult de 30 de minute) pentru a afișa solicitarea inițială a parolei pentru un cont de domeniu?

RU: Почему sudo очень медленно (более 30 минут) отображает начальный запрос пароля для учетной записи домена?

VI: Tại sao sudo rất chậm (hơn 30 phút) để hiển thị lời nhắc mật khẩu ban đầu cho tài khoản miền?

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