ssh: connect to host ipaddress port 22: Operation not permitted

Question

I've installed CentOs 7 on my server and trying to connect to it by ssh ipaddress but I get following error: ssh: connect to host 172.20.2.74 port 22: Operation not permitted

In order to solve this error I have done these solution:

1. In /etc/ssh/sshd_config I have set PermitRootLogin to yes
2. I've created new user and tried to ssh by ssh newuser@ipaddress

But No matter what I do, I always get the same error and couldn't find anything helpful in net.

Is there somthing that I'm missing there, maybe somthing in sshd_config?

Update Due to @Rabban comment.. I added -vvv to ssh command and here's the result:

$ ssh -vvv ipaddress
OpenSSH_7.3p1, OpenSSL 1.0.2k  26 Jan 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: resolving "ipaddress" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to ipaddress [ipaddress] port 22.
debug1: connect to address ipaddress port 22: Operation not permitted
ssh: connect to host ipaddress port 22: Operation not permitted

Solution

I don't know if it's foolish or what, but maybe this experience help someone else later.

The problem was solved when I disabled my firewall in remote system (Cuz i'm trying ssh via git bash in windows). And I can connect by root and newuser now.

Comments

[Yaron]

Are you sure that sshd is running on the machine? what is the result of running ssh localhost from the machine to itself?

[Satō Katsura]

Related: How to fix "operation not permitted" on ssh login?

[Alex Jolig]

@SatoKatsura I've checked that question. nothing there was helpful

[Alex Jolig]

@Yaron I've ran ssh by service sshd start

[user6075516]

Try sshing with the -vvv flag and append the output to your question. The relevant section of journalctl -u sshd couldn't hurt either.

[Alex Jolig]

@Rabban The first part is done. As for the second part of your comment I have no idea what did you mean!