SSH Alternative Port: Difference between revisions
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(Created page with "== Setting up an Alternative port for SSH == === Reason === Virginia Tech campus blocks certain ports at the network border to the rest of the internet. === Alternatives ===...") |
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=== Alternatives === | === Alternatives === | ||
Besides using a different port for SSH, you could also do one of the following: | Besides using a different port for SSH, you could also do one of the following: | ||
Use the VT VPN. Most VT's users have VPN access if they have set it up. | |||
https://onecampus.vt.edu/task/all/installing-pulse-vpn | |||
If the server is well established (more than just a lab server or desktop) you can request a port 22 exception from Virginia Tech. In order to do that contact techstaff@cs.vt.edu | |||
== Setup Alternative SSH Port == | == Setup Alternative SSH Port == | ||
| Line 16: | Line 17: | ||
Port 22 | Port 22 | ||
Port 2222 | Port 2222 | ||
Then Restart the sshd service: | |||
sudo service sshd restart | |||
== Open the ports on your firewall == | |||
=== Ubuntu === | |||
sudo ufw limit 22 | |||
sudo ufw limit 2222 | |||
sudo ufw enable #if you have not already done so# | |||
sudo ufw status #verify the changes# | |||
=== CentOS === | |||
sudo firewall-cmd --add-port=22/tcp --permanent #May not be needed# | |||
sudo firewall-cmd --add-port=2222/tcp --permanent | |||
sudo service firewalld reload | |||
Latest revision as of 13:01, 3 August 2021
Setting up an Alternative port for SSH
Reason
Virginia Tech campus blocks certain ports at the network border to the rest of the internet.
Alternatives
Besides using a different port for SSH, you could also do one of the following:
Use the VT VPN. Most VT's users have VPN access if they have set it up. https://onecampus.vt.edu/task/all/installing-pulse-vpn
If the server is well established (more than just a lab server or desktop) you can request a port 22 exception from Virginia Tech. In order to do that contact techstaff@cs.vt.edu
Setup Alternative SSH Port
We recommend adding an additional port vs replacing another port for 22. In your /etc/ssh/sshd_config modify the following line:
#Port 22
with this:
Port 22 Port 2222
Then Restart the sshd service:
sudo service sshd restart
Open the ports on your firewall
Ubuntu
sudo ufw limit 22 sudo ufw limit 2222 sudo ufw enable #if you have not already done so# sudo ufw status #verify the changes#
CentOS
sudo firewall-cmd --add-port=22/tcp --permanent #May not be needed# sudo firewall-cmd --add-port=2222/tcp --permanent sudo service firewalld reload