Re: Network problems
- From: Bill Stanley <bstanle@xxxxxxxxxx>
- Date: Wed, 22 Dec 2010 14:14:48 -0500
On 12/22/2010 12:08 PM, Lucio M Nicolosi wrote:
On Tue, Dec 21, 2010 at 4:36 PM, Bill Stanley<bstanle@xxxxxxxxxx> wrote:
Hi,
I am having problems with sharing files between the two computers on my
home network. The particulars.
1. The two computers are both running Unbuntu Linux.
a. One computer is running Unbuntu 10.10 - 64 bit version.
b. the other computer is running Unbuntu 10.04 - 32 bit version
2. I have full Internet connectivity with both computers I just can't
share the files between the two computers.
I tried using ping and I can get a ping reply one way but not the other
way. I suspect that the firewall on one computer might be getting in
the way but I don't know enough yet to know where to look. I have
installed the gufw 10.04.5 firewall and maybe I have two firewalls
running? How do I check? By the way, this is the computer that does
not reply to a ping request from the other computer. It can send a ping
request and receive a reply from the other computer.
When I try to access a file I get the following.
1. On both computers I have activated the folder share option.
(temporarily, I only allow access to the documents folder on both
computers.)
2. On one computer (the one that responds to a ping) I get an error
saying that the other computer has not sent a file share list. This is
not too suprising since the other computer does not respond to a ping as
well.
3. On the other computer, I get nothing when trying to access the home
network.
There is a third computer running Windows but this one has not been run
for quite a while (The windoze computer is rather old and unused) If I
get the present problem sorted out, I would also like to access files
with the Windoze computer. I know I need Samba for this and have
already installed Samba on both Unbuntu computers. Maybe this is
getting in the way?
As always, I will be glad to supply any additional information that is
needed. Thank you in advance for any help you can give.
One easy way to check if firewalls are blocking remote access is
disabling both and trying to ping again.
I guess that a single firewall would do, depending on how internet is
accessed and the physical layout of the local net.
I don't believe that Samba can be responsible for this pinging trouble.
The command "sshfs" is useful to mount remote folders in a linux
environment. You should check "man sshfs".
example:
Mount
sshfs -o idmap=user -C (remote user)@(ip adress):(remote
folder) (empty local folder)
sshfs -o idmap=user -C bill@xxxxxxxxxxxx:/home/bill/
/home/bill/remote
Unmount:
fusermount -u /home/bill/remote
Lucio
Thanks for the reply...
I'm not certain if I am running two firewalls. I assume I am because I
know I installed the gufw firewall on the computer that doesn't respond
to a ping. I assume that Unbuntu installs a firewall by default. If
so what is its name because I don't see any evidence of it. This is the
first firewall I assume I have. If there isn't one, then I have gufw only.
The strange thing is that I use the unaffected computer to do a port
scan (using the system/administration/network tools) and can get some
output back from the affected computer.
The output of the port scan (from the unaffected computer) is...
PORT STATE SERVICE
111 open sunprc
2049 open nfs
40837 open unknown
45314 open unknown
50038 open unknown
When I do a port scan from the affected computer (of its port status i
get...
Port State service
111 open sunprc
2049 open nfs
40837 open unknown
45314 open unknown
50038 open unknown
52826 open unknown
I am somewhat concerned about the open ports with an unknown service.
Is there any way to get more information about those services?
Although Linux has much fewer viruses than Windoze, I don't have any
illusions that they exist. Although I am very careful about security,
maybe one escaped my notice. (I hope not.)
I notice that the unaffected computer can see the nfs service running on
the affected computer. If I can see the nfs service running, what must
be done to share files using the nfs service.
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