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Can't SSH into fresh Fedora Server 27 after changing port, SELinux type enforcement & Firewall rules

asked 2018-02-04 22:43:17 -0600

nonce gravatar image

I've essentially done the following:

sudo sed -i 's/#Port\ 22/Port\ ###/' /etc/ssh/sshd_config

sudo semanage port -a -t ssh_port_t -p tcp ###

sudo firewall-cmd --permanent --zone=public --add-port=###/tcp

Keys were created & copied with the following:

ssh-keygen -t rsa

ssh-copy-id user@host

On the client box, I'm met with an error about 'no route to host'. Default port works without issue. Any input is appreciated.

Thank you,

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Two important questions.

Is sshd socket-activated on your system? That is: is sshd.socket enabled. If that is the case, the sshd.socket service file needs adjusting as well.

Has the sshd daemon been restarted?

villykruse gravatar imagevillykruse ( 2018-02-07 03:29:26 -0600 )edit

2 Answers

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answered 2018-02-06 01:33:49 -0600

ssieb gravatar image

That would indicate that the firewall rule isn't doing what you think it is. What is the output of firewall-cmd --get-active-zones? The problem most likely is that you are only changing the permanent config, not the runtime config. Run that firewall-cmd line again without the --permanent. The better way to do something like that is to add the rules to the runtime config first and then if it works, you run firewall-cmd --runtime-to-permanent to save it.

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answered 2018-02-07 03:17:19 -0600

Glenn gravatar image

Reload the firewall.

firewall-cmd --reload
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Asked: 2018-02-04 22:43:17 -0600

Seen: 483 times

Last updated: Feb 07 '18