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Ubuntu 10.10 & Open Ports

Posted on 2012-04-03
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Last Modified: 2012-04-19
I need to open the SSH port on an Ubuntu 10.10 (Maverick) machine.  How do i do this?
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Question by:deklinm
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WebF00L earned 167 total points
ID: 37802680
sudo apt-get install openssh-server

IF you have ufw active you might have to add

sudo ufw allow 22

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by:deklinm
ID: 37802697
SSH is already installed.  I need to open the port to allow the traffic for it.
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by:legolasthehansy
legolasthehansy earned 333 total points
ID: 37802745
Follow the instructions in this link if you using ufw as the firewall.

http://beginlinux.wordpress.com/2008/11/23/ubuntu-810-uncomplicated-firewall-gui/
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by:deklinm
ID: 37802868
sudo: ufw: command not found
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by:legolasthehansy
ID: 37802904
Try "apt-get install gufw" to install the application using apt-get
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by:deklinm
ID: 37802911
if gufw isnt installed then can't I just edit a port config file?
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by:legolasthehansy
legolasthehansy earned 333 total points
ID: 37802931
gufw is a graphical utility to edit your firewall rules. It is just easier. If you prefer the command line try this, "ufw allow 22"

See if you are able to "telnet localhost 22" first to see if the service is up and running.
Next try telnet host 22 from another machine before and after running ufw allow 22

Good luck
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Author Comment

by:deklinm
ID: 37802938
# ufw allow 22
-bash: ufw: command not found

I can telnet to the machine now.  The problem is the machine will only accept telnet connections from one specific IP address
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by:legolasthehansy
ID: 37802955
So.. it shouldn't be your firewall that is blocking. Have you checked /etc/ssh/sshd_config file and see if there are rules set such as (allow). Also check /etc/hosts.allow and /etc/hosts.deny files.
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