Re: ssh in network

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Author: Michael Havens
Date:  
To: Main PLUG discussion list
Subject: Re: ssh in network
On Sun, Apr 1, 2012 at 7:28 PM, Lisa Kachold <>
wrote:
>Are you colorblind?

^---------------------------------- only slightly

>respond inline.


^---------------------------------------not sure what you mean.

>Let's address each item until we resolve things:

On Sun, Apr 1, 2012 at 5:49 PM, Michael Havens <> wrote:
>>>A route add command is not persistent past a reboot or network restart.
>>It seems to have been. I rebooted and still can't ssh from the laptop to

the ubuntu.
>But you couldn't also ssh BEFORE you did the route add so these are two

different things.
Yes I could. I could ssh from the laptop to the ubuntu (printserver) until
I issued the command ' sudo ip route add
192.168.1.0/24<http://192.168.0.1/24>dev eth0' on the ubuntu on the
advice of my google search. Then I tried to
delete it and add the proper route (192.168.0.1) but that didn't help any.

>Take down your wlan (are you using wicd?)


^-----------Wireless is now off. I don't know what Mint uses... it doesn't
say.
>>>Verify that both boxes have a listening ssh daemon:


>># sudo netstat -antp | grep 22


>>tcp        0      0 0.0.0.0:22              0.0.0.0:*

LISTEN      433/sshd


>><ubuntu>


>>tcp        0      0 0.0.0.0:139             0.0.0.0:*

LISTEN      12243/smbd


>>tcp        0      0 0.0.0.0:445             0.0.0.0:*

LISTEN      12243/smbd


>><laptop>


>Good you have sshd listening on port 22 on ubuntu.


>You do NOT have sshd (daemon) listening on your laptop.


>Be sure you have started it if you want to ssh to the laptop from ubuntu:


># sudo /etc/init.d/ssh start


>In order to make sure ssh starts at boot in Ubuntu:


># sudo update-rc.d ssh defaults <-------------done


>Reference: https://help.ubuntu.com/community/UbuntuBootupHowto


>>Make sure you haven't installed DenyHosts or iptables that limits your

connections:

>># locate Deny |more


>># sudo iptables-save |more


>sudo locate Deny|more <------------------no respose


>sudo locate iptables-save|more


>/sbin/iptables-save


>/usr/share/man/man8/iptables-save.8.gz


>enter


># sudo iptables-save


>You are looking to see if your iptables is up and configured to firewall

ssh. Dump the response in here.

bmike1@Michaels-PC:~$ sudo locate iptables-save
/sbin/iptables-save
/usr/share/man/man8/iptables-save.8.gz
bmike1@Michaels-PC:~$

>Oops, sorry wrong link! ddclient is for opendns dynamic dns entries, that

logs into your provider and resets a public ip when needed. Turn it down
for now:*
# sudo /etc/init.d/ddclient stop*
^-----------------done

>Here's how to set it up (once you get ssh setup); it requires an opendns

account.
>http://ubuntuforums.org/showthread.php?t=1264710

<http://ubuntuforums.org/showthread.php?t=1264710>
^--if you can remember please remind me
later<http://ubuntuforums.org/showthread.php?t=1264710>

<http://ubuntuforums.org/showthread.php?t=1264710>>your system is updated,
if it runs? Correct?
^------------ Correct

>Check your /etc/nsswitch.conf file to be sure it has
>"hosts: files dns" Reference:

http://www.faqs.org/docs/securing/chap6sec71.html
I'm not sure what you want here. Here is the file:
# /etc/nsswitch.conf
passwd: compat
group: compat
shadow: compat
hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis

>Then ping each server before trying to reconnect with ssh.<--- they ping

both ways.
>I am pretty sure that this will work now that you have them both on the

same network. Be sure you don't
>have any iptables running denying your port 22 on both servers! iptables

-L doesn't have any deny rules in it

I don't see any deny rules in my iptables.
--
:-)~MIKE~(-:
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