ssh server partially works

[vigilant]

to be honest i have 2 problems to solve:

im creating an ftp server that has ubuntu intrepid on it. my laptop is FreeBSD 7.1 i can only connect locally when im on my wireless network. i installed an ssh client to my cellphone. it wont connect to the server. the phone is an samsung blackjack with windows mobile. i have a windows xp partition of the bsd computer and i have a centos computer for my local server. i booted back into windows and tested openssh and was able to connect ONLY WHEN I WAS ON WIFI. when turned off the card and connected the phone as modem i am unable to acess the server.

the ubuntu server is however connected to the wifi network and able to acess the web. so my two questions are

1) how do i make it so i can ssh to this server from my school?
2) in order to ssh from school i need to be able to tether my samsung blackjack to my BSD laptop since thats what i normally use so i can get internet otherwise ill have buy a usb modem and they not cheap.

i also had edited my hosts file in /etc/hosts in ubuntu to get the server running under my boss suggestion i thing may have been uneeded. could that be the problem?

[trev]

Define "i am unable to access the server". What happens? What are the error messages? What happens if you throw in a few -vv to ssh?

[vigilant]

what happens is if im connecting from abroad or attempting to ssh thru my phone it says connection timed out. i have not tried ssh -vv im gonna look into that now.

[anomie]

im creating an ftp server that has ubuntu intrepid on it. my laptop is FreeBSD 7.1 i can only connect locally when im on my wireless network. i installed an ssh client to my cellphone. it wont connect to the server. the phone is an samsung blackjack with windows mobile. i have a windows xp partition of the bsd computer and i have a centos computer for my local server. i booted back into windows and tested openssh and was able to connect ONLY WHEN I WAS ON WIFI. when turned off the card and connected the phone as modem i am unable to acess the server.

There are a few dozen different things that can cause the symptoms you're describing. My first question is: is your Ubuntu server sitting behind a NAT device (on private IP space) at your home?

From the Ubuntu box, let's see the output produced by the following:

/sbin/ifconfig
netstat -ltn | grep '22'


Also, post the exact ssh client command you're using.

[vigilant]

arumator@ubuntu:~$ sudo /sbin/ifconfig
[sudo] password for arumator:
\eth0 Link encap:Ethernet HWaddr 00:1f:a7:6c:1c:8e
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:51

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:21848 errors:0 dropped:0 overruns:0 frame:0
TX packets:21848 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1272432 (1.2 MB) TX bytes:1272432 (1.2 MB)

wlan0 Link encap:Ethernet HWaddr 00:1f:a7:6c:1c:8e
inet addr:192.168.1.109 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21f:a7ff:fe6c:1c8e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1039863 errors:0 dropped:0 overruns:0 frame:0
TX packets:1084446 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:885615660 (885.6 MB) TX bytes:769937536 (769.9 MB)

arumator@ubuntu:~$ sudo netstat -ltn | grep '22'
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp6 0 0 :::22 :::* LISTEN
arumator@ubuntu:~$

my server is open ssh server and i just checked to make sure that the server package is installed and it is. the client is also installed.

[anomie]

192.168.1.109/24 is a host on a private network (http://en.wikipedia.org/wiki/Private_network).

You're going to need to configure your router/switch/NAT device to forward requests from the 'net to tcp port 22 on its external interface to your internal server.

[vigilant]

sorry i havent been able to reply to this i was in bed all day. i had my brother send ports 22 and 24 to me and i still couldnt connenct if i switched off my wifi card and used my cell as a usb modem with windows amd i get the same error: connection timed out.

he said it probaly wouldnt work becuase i need to set a static ip. last time i tried that though i was unable to connect to server at all.

[vigilant]

since i dont know where the edit button is my brother is out of town anfd hes our family's router admin.

[anomie]

Please read the private network article so that you understand what you're dealing with here. From the 'net you're going to have to connect to the router/NAT device's external (i.e. publicly routable) interface.

You could use one of the free "dynamic dns" services (e.g. DynDNS (http://www.dyndns.com/)) so that you won't have to keep checking if the IP has changed, but that's perhaps another thread.