SSH Stuck waiting for reply after offering public key

### Info ### I have 2 remote machines, both are Linux and same OS version. When I tried to SSH to the machine as one of the user inside via public key, machineA works but machineB get stucked after offerring the public key. From what I understand, SSH uses StrictModes by default which requires: - In

/etc/ssh/sshd_config

, contains

yes

and

.ssh/authorized_keys

-

/home/

with

750

or stricter -

/home//.ssh

with

700

or stricter -

/home//.ssh/authorized_keys

with

600

or stricter ### What I have done? ### For my requirements, I need the

of

to be managed by another user, let's say

. So I have done the following configurations to allow

to manage

's

chmod 750 /home/
chmod 700 /home//.ssh
chmod 600 /home//.ssh/authorized_keys
setfacl -m u::rwx /home/
setfacl -m u::rwx /home//.ssh
setfacl -m u::rwx /home//.ssh/authorized_keys

So I enter both machineA & machineB as admin via password and paste my public key into

/home//.ssh/authorized_keys

When I tried SSH to both system via Putty, machineA works but machineB fails. ### Loggings ### This is the event logs of putty when try to SSH to machineB, it's stuck after

public key

And this is the

-f /var/log/auth.log

at machineB: I check these configurations at both machines: - ✅ownership of file/directory is the user - ✅permission is same as previous statement - ✅both machines had same configurations I also tried

/usr/sbin/sshd -d -p 2222

at target machine and SSH to the system via command prompt using

-i C:\path\to\private-key -p 2222 @

and this is the log I got: ### Others things tried ### - Revoke all ACL permission on machineB, and able to SSH to machineB via public key after that. - Set

no

in

/etc/ssh/sshd_config

at machineB, and it works afterwards. But I know this is not a good idea. - Check

/etc/ssh/sshd_config

at machineA, and it has

yes

commented, but I believe it's enabled by default. ### Questions ### - What configurations that I may missed? - Is it related to proxy? Because machineA is behind a proxy while machineB is not. Any help or insight is appreciated :D