can't ssh from host to remote
Michael Havens
bmike1 at gmail.com
Fri Jul 18 00:52:23 MST 2014
I understand now..... I bought a new tower w/o a wireless card and so to
connect it to the net (so I didn't need to make another 50 foot ethernet
cable) I had to hardwire from the modem/router I bought from qwest to a
router I bought before they started to combine modems and routers and
connect that to the new box and my brother's computer. And that is why I
have another network and probably has something to do with the ssh
difficulties too. however, if that is the case why can I ssh one way but
not the other?
:-)~MIKE~(-:
On Thu, Jul 17, 2014 at 3:44 PM, James Dugger <james.dugger at gmail.com>
wrote:
> Different address range. Are you on wifi? Are you picking up a different
> network from another router?
> On Jul 17, 2014 2:13 PM, "Michael Havens" <bmike1 at gmail.com> wrote:
>
>> it seems I can't ssh from the host to any other computer though I can ssh
>> from the clients to the host. (tested on two computers). It is strange, the
>> ip adresses on the remote boxes seem to have changed. instead of being
>> 192.168.0.x they are now 192.168.1.10x.
>> gots to go to work now.
>>
>> :-)~MIKE~(-:
>>
>>
>> On Thu, Jul 17, 2014 at 1:47 PM, Michael Havens <bmike1 at gmail.com> wrote:
>>
>>> on the server it says:
>>>
>>> tcp 0 0 0.0.0.0:22 0.0.0.0:*
>>> LISTEN 1308/sshd
>>> tcp 0 0 127.0.0.1:22 127.0.0.1:56545
>>> ESTABLISHED 19569/sshd: bmike1
>>> tcp 0 0 127.0.0.1:56545 127.0.0.1:22
>>> ESTABLISHED 19568/ssh
>>> tcp6 0 0 :::22 :::*
>>> LISTEN 1308/sshd
>>>
>>> while the client says:
>>>
>>> tcp 0 0 0.0.0.0:22 0.0.0.0:*
>>> LISTEN 2546/sshd
>>> tcp6 0 0 :::22 :::*
>>> LISTEN 2546/sshd
>>>
>>> so it looks like both are listening.
>>>
>>> :-)~MIKE~(-:
>>>
>>>
>>> On Thu, Jul 17, 2014 at 1:04 PM, Michael Butash <michael at butash.net>
>>> wrote:
>>>
>>>> sudo netstat -anp | grep tcp | grep LISTEN
>>>>
>>>> -a == all
>>>> -n == do not resolve dns (slows it down significantly)
>>>> -p == show the app opening the socket (requires sudo to enumerate)
>>>>
>>>> grep tcp == look for tcp-based sockets (most apps won't use udp)
>>>> grep LISTEN == look at listening sockets, vs established that indicated
>>>> something *is* connected
>>>>
>>>> This is a good one to remember, this shows all your "listening"
>>>> sockets. Your ssh socket is outbound to another host, but doesn't look
>>>> like sshd is listening on port 22, which won't let you in.
>>>>
>>>> TCP/UDP sockets are your door into the system.
>>>>
>>>> mb at host ~ $ sudo netstat -anp | grep tcp | grep ssh
>>>> [sudo] password for mb:
>>>> tcp 0 0 0.0.0.0:22 0.0.0.0:*
>>>> LISTEN 19847/sshd
>>>> tcp6 0 0 :::22 :::*
>>>> LISTEN 19847/sshd
>>>>
>>>> First is ipv4-based socket, second is ipv6-based. You should see
>>>> similar, with 0.0.0.0 meaning it's listening on _all_ interfaces.
>>>>
>>>> -mb
>>>>
>>>>
>>>>
>>>> On 07/17/2014 12:28 PM, Michael Havens wrote:
>>>>
>>>> okay,
>>>> netsstat on the server prints out a lot of data.
>>>> The first section says:
>>>> Active Internet connections (w/o servers)
>>>> Proto Recv-Q Send-Q Local Address Foreign Address
>>>> State
>>>> tcp 0 0 192.168.0.4:38521 lax17s01-in-f21.1:https
>>>> ESTABLISHED
>>>> tcp 0 0 192.168.0.4:36523 lax17s01-in-f4.1e:https
>>>> ESTABLISHED
>>>> tcp 0 0 localhost:45886 localhost:53919
>>>> ESTABLISHED
>>>> tcp 0 0 localhost:ssh localhost:56545
>>>> ESTABLISHED
>>>> tcp 0 0 localhost:44799 localhost:53919
>>>> ESTABLISHED
>>>> tcp 0 0 localhost:47157 localhost:53919
>>>> ESTABLISHED
>>>> tcp 0 0 localhost:53919 localhost:44799
>>>> ESTABLISHED
>>>> tcp 0 0 localhost:53919 localhost:47157
>>>> ESTABLISHED
>>>> tcp 0 0 localhost:56545 localhost:ssh
>>>> ESTABLISHED
>>>> tcp 0 0 localhost:53919 localhost:45886
>>>> ESTABLISHED
>>>> tcp 0 0 192.168.0.4:37884 lax17s01-in-f0.1e:https
>>>> ESTABLISHED
>>>> tcp 0 0 192.168.0.4:45304 lax17s01-in-f5.1e:https
>>>> ESTABLISHED
>>>> tcp 0 0 192.168.0.4:36525 lax17s01-in-f4.1e:https
>>>> ESTABLISHED
>>>> tcp6 1 0 ip6-localhost:53614 ip6-localhost:ipp
>>>> CLOSE_WAIT
>>>>
>>>> while the second section says:
>>>> Active UNIX domain sockets (w/o servers)
>>>> Proto RefCnt Flags Type State I-Node Path
>>>> unix 18 [ ] DGRAM 11578 /dev/log
>>>> unix 2 [ ] DGRAM 10914
>>>> /var/run/wpa_supplicant/wlan0
>>>> unix 3 [ ] STREAM CONNECTED 343530
>>>> unix 3 [ ] STREAM CONNECTED 198728
>>>> unix 3 [ ] STREAM CONNECTED 198167
>>>> unix 3 [ ] STREAM CONNECTED 198683
>>>> ---edit out a lot of stuff--
>>>>
>>>> while on the remote system netstat prints 7 lines that is basically
>>>> the second section (above).
>>>>
>>>> I'm not sure how to run sshin debug mode but the man page implies to
>>>> run it with the verbose flag:
>>>> :~$ ssh -v mike at 192.168.1.101
>>>> OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
>>>> debug1: Reading configuration data /etc/ssh/ssh_config
>>>> debug1: /etc/ssh/ssh_config line 19: Applying options for *
>>>> debug1: Connecting to 192.168.1.101 [192.168.1.101] port 22.
>>>> debug1: connect to address 192.168.1.101 port 22: Connection timed out
>>>> ssh: connect to host 192.168.1.101 port 22: Connection timed out
>>>> bmike1 at CQ57-1:~$ ssh -vv mike at 192.168.1.101
>>>> OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
>>>> debug1: Reading configuration data /etc/ssh/ssh_config
>>>> debug1: /etc/ssh/ssh_config line 19: Applying options for *
>>>> debug2: ssh_connect: needpriv 0
>>>> debug1: Connecting to 192.168.1.101 [192.168.1.101] port 22.
>>>> debug1: connect to address 192.168.1.101 port 22: Connection timed out
>>>> ssh: connect to host 192.168.1.101 port 22: Connection timed out
>>>>
>>>>
>>>> :~$ ps -aef | grep sshd
>>>> root 1308 1 0 Jul15 ? 00:00:00 /usr/sbin/sshd -D
>>>> bmike1 19566 4242 0 11:53 pts/2 00:00:00 grep --colour=auto sshd
>>>>
>>>>
>>>> it doesn't seem ssh failed at any point.
>>>>
>>>> :-)~MIKE~(-:
>>>>
>>>>
>>>> On Thu, Jul 17, 2014 at 12:33 AM, James Mcphee <jmcphe at gmail.com>
>>>> wrote:
>>>>
>>>>> Verify openssh is enabled on the server with netstat. Verify you can
>>>>> connect to port 22 from client to server. Run ssh in debug mode to see
>>>>> messages. When you hit a point that it fails, then you have a better idea
>>>>> of what's wrong.
>>>>>
>>>>>
>>>>> On Wed, Jul 16, 2014 at 9:54 PM, Michael Havens <bmike1 at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> okay, so I bought a used computer to do Linux from scratch on.
>>>>>> Well, I'm going to ssh from my primary computer to the new computer but got
>>>>>> a 'Connection timed out' error. After googling for a bit I discovered ufw
>>>>>> was to blame.
>>>>>>
>>>>>> after I disabled the firewall I could ssh from 192.168.1.101
>>>>>> <parasite> to 192.168.0.4 <host>
>>>>>>
>>>>>> the error I got going the other way was the connection timed out
>>>>>> error:
>>>>>>
>>>>>> ssh mike at 192.168.1.101
>>>>>> ssh: connect to host 192.168.1.101 port 22: Connection timed out
>>>>>>
>>>>>> After googling some more I thought perhaps openssh-server wasn't
>>>>>> installed... but it is. So please.... what is the problem? I verifed
>>>>>> openssh-client is installed but I don't know what it could be. Could you
>>>>>> help me out?
>>>>>> :-)~MIKE~(-:
>>>>>>
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>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> James McPhee
>>>>> jmcphe at gmail.com
>>>>>
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>>>>
>>>>
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>>
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