[CS-FSLUG] Networking with Ubuntu or Fedora Core 6 part 3
Hilding Egestål
he7316575 at yahoo.se
Wed Feb 28 13:45:25 CST 2007
This is the result
[root at localhost ~]# smbclient -L 192.168.0.2
Password:
session setup failed: NT_STATUS_LOGON_FAILURE
Tim Young skrev:
> Hi,
> Sorry for not responding sooner. (Remember how I said I occasionally am
> too busy to answer... :)
>
> To see what printers are available, you can browse the network and go to
> the big computer. It will tell you what printers are available.
>
> Or, you can run the following from the command-line:
> smbclient -L [servername]
> smbclient -L 192.168.0.2
>
> That will list all the shares available on the server.
>
> The URI syntax is:
>
> *
>
> smb://server[:port]/printer
>
> *
>
> smb://workgroup/server[:port]/printer
>
> *
>
> smb://username:password@server[:port]/printer
>
> *
>
> smb://username:password@workgroup/server[:port]/printer
>
> So, if your printer was named, "HPLaser", your URI would be:
> smb://192.168.0.2/HPLaser
>
>
> You can have both ssh and smb enabled at the same time. Each "service"
> runs on a different port. The ports are numbers, like 631 for cups
> (printing). It is difficult (but not impossible) to have two services
> on the same port on the same computer. Ssh uses port 22 (TCP), and
> samba uses
>
> 137:UDP, 138:UDP, 139:TCP
>
> The ports are like different house numbers on a street. They allow the
> various programs to separate out what things are happening on your
> computer, and which program the network packet should go to.
>
> - Tim Young
>
> Hilding Egestål wrote:
>
>> smb://192.168.0.2 but after that? I have searched on the big PC for the
>> folders and found /usr/local/Brother/lpd or cups. Shall I use that
>> instead of /Brother
>> Is it possible to have SSH and Samba at the same time?
>>
>> /Hilding
>>
>>
>>
>> Tim Young skrev:
>>
>>
>>> Sometimes I have time to respond, other times I do not. There are many
>>> times when I have knowledge to help people out, but I do not have time
>>> to. :( But, today I have a little time and needed the break from what
>>> I am currently working on. :)
>>>
>>> Your printing is relatively easy to do. I am assuming you have samba
>>> installed (for file sharing) since those are the firewall rules I gave
>>> you. Samba, by default, shares the printer. So, all you need to do is
>>> configure it on the other computer. You already have samba and cups
>>> (port 631) available.
>>>
>>> On your computer with the printer on it, make sure that cups is
>>> enabled. (there is some gui that tells you which services are started
>>> at boot time. It should be there.)
>>>
>>> The URI (what it asks you for when you go to add a printer) should be
>>> something like:
>>> smb://192.168.0.2/Brother
>>> or the ipp thing you had below. Either one should work.
>>>
>>> You would install this network printer through the same menu system you
>>> installed the local one, just on the small PC.
>>>
>>> - Tim Young
>>>
>>> Hilding wrote:
>>>
>>>
>>>
>>>> Well I must say, You are a real source of knowledge. Now I can see the
>>>> folders from the big PC with FC6 in the small PC with FC6. So, now I
>>>> have got step 2: the printer, ssh is installed. I have used
>>>>
>>>> ipp://192.168.0.2/printers/Brother
>>>>
>>>> for the printer. IPnumber 192.168.0.2 is the big PC, and I would like to
>>>> sit at the small PC, printing out my documents on the big one. What do
>>>> You say about this?
>>>>
>>>> /Hilding in Gothenburg
>>>>
>>>>
>>>>
>>>> Tim Young skrev:
>>>>
>>>>
>>>>
>>>>
>>>>> Where you change ssh to reliable, you will also need to add:
>>>>> 137:UDP
>>>>> 138:UDP
>>>>> 139:TCP
>>>>>
>>>>> There will probably not be a check-mark for these services, but there
>>>>> should be an "other services" text box where you can type in the above
>>>>> lines.
>>>>>
>>>>> - Tim Young
>>>>>
>>>>> Ps. The lines below represent your firewall. What you have are a bunch
>>>>> of rules which occur in order. They consist of a pattern and an
>>>>> action. If the network connection matches the pattern, then the action
>>>>> occurs.
>>>>>
>>>>> You have a bunch of "ACCEPT" actions. If the pattern is the printing
>>>>> protocol (dport 631), then it is accepted and allowed through the
>>>>> firewall. At the end of the list is a rule which REJECTS all the
>>>>> packets which had not been allowed beforehand. So if you do not see an
>>>>> "ACCEPT" rule for something in particular, it gets rejected.
>>>>>
>>>>> If you want to see a list of the various things you can accept or
>>>>> reject, you can find it in /etc/services
>>>>>
>>>>>
>>>>> Hilding wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> Going to System - Security Level: and changing to mark SSH as reliable
>>>>>> will give You this iptables-save
>>>>>>
>>>>>> Generated by iptables-save v1.3.5 on Mon Feb 26 17:26:09 2007
>>>>>> *filter
>>>>>> :INPUT ACCEPT [0:0]
>>>>>> :FORWARD ACCEPT [0:0]
>>>>>> :OUTPUT ACCEPT [2:320]
>>>>>> :RH-Firewall-1-INPUT - [0:0]
>>>>>> -A INPUT -j RH-Firewall-1-INPUT
>>>>>> -A FORWARD -j RH-Firewall-1-INPUT
>>>>>> -A RH-Firewall-1-INPUT -i lo -j ACCEPT
>>>>>> -A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type any -j ACCEPT
>>>>>> -A RH-Firewall-1-INPUT -p esp -j ACCEPT
>>>>>> -A RH-Firewall-1-INPUT -p ah -j ACCEPT
>>>>>> -A RH-Firewall-1-INPUT -d 224.0.0.251 -p udp -m udp --dport 5353 -j ACCEPT
>>>>>> -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
>>>>>> -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT
>>>>>> -A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
>>>>>> -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j
>>>>>> ACCEPT
>>>>>> -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
>>>>>> COMMIT
>>>>>> # Completed on Mon Feb 26 17:26:09 2007
>>>>>>
>>>>>>
>>>>>>
>>>>>> Tim Young skrev:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Hi there,
>>>>>>> One of the problems with a network with Linux is that there are a ton of
>>>>>>> ways to do everything. If all you have is two Linux boxes, then you
>>>>>>> will want to use NFS file-sharing. If you may sometime use a windows
>>>>>>> box on your computer, you will want to set up Samba (You may do it
>>>>>>> instead of NFS. They are not mutually exclusive, they just do the same
>>>>>>> thing two different ways.)
>>>>>>>
>>>>>>> With your problem of things not opening eachother, my first guess is
>>>>>>> that you have a firewall set up. You can determine if you have a
>>>>>>> firewall by running:
>>>>>>> iptables-save
>>>>>>>
>>>>>>> If it prints a lot of lines, then you have a firewall. :)
>>>>>>>
>>>>>>> You may look at:
>>>>>>> http://tldp.org/HOWTO/SMB-HOWTO.html
>>>>>>> This tells you about file and printing.
>>>>>>>
>>>>>>> You will probably want to break things up into a few parts:
>>>>>>> Getting the computers to contact eachother via the net.
>>>>>>> (firewalling, IP addresses, DNS, etc.)
>>>>>>> Sharing information
>>>>>>> (Samba, NFS, SSH, etc.)
>>>>>>>
>>>>>>> There is a Linux networking howto at tldp.org, but it gets very
>>>>>>> complex. Since you already have IP addresses, I will assume that you
>>>>>>> just have a firewall blocking connectivity. You can turn off your
>>>>>>> firewall a few ways. Fedora uses a program called "lokkit" in the
>>>>>>> command-line world, but it has some interface in the GUI world. I do
>>>>>>> not have FC6 so I don't know where it is. If you have a firewall
>>>>>>> between you and the outside world, for now, just turn off your firewall.
>>>>>>>
>>>>>>> For sharing files, you will most likely end up setting up Samba. It is
>>>>>>> horribly more complex than NFS, but it works in more cases than NFS
>>>>>>> does. The samba link I gave you up there may be helpful. But since you
>>>>>>> already set up some shares, most likely, when you have the firewall
>>>>>>> turned off, things will start working. If not, I can give you a few
>>>>>>> commands that will tell you quickly where the problem is.
>>>>>>>
>>>>>>> Fedora used to allow root SSH by default, so my guess here is that once
>>>>>>> you have your firewall down, everything will work. If not, ssh is
>>>>>>> usually very simple. Make sure it is enabled at boot
>>>>>>> chkconfig sshd on
>>>>>>> and then make sure it is currently started up
>>>>>>> service sshd start
>>>>>>>
>>>>>>> Then, from the machine you are on, ssh to yourself to see if it works
>>>>>>> local. If it does, then try it from the other computer. Most all SSH
>>>>>>> issues, unless you have been playing with the sshd_config file, will be
>>>>>>> with the firewall or not having your service started.
>>>>>>>
>>>>>>> Hope that helps some.
>>>>>>>
>>>>>>> - Tim Young
>>>>>>>
>>>>>>> HildingE wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> Well, sorry to say I am returning to basic about creating network, this
>>>>>>>> time with Fedora Core 6. Where can I find an easyread HOWTO installing
>>>>>>>> network? I am just using network between two LinuxPC. Beside Ubuntu I
>>>>>>>> have a little bit curios about Fedora Core 6, but it seems more
>>>>>>>> difficult to get it right.
>>>>>>>>
>>>>>>>> Places: connect to server - ssh - the adresses to the two computers,
>>>>>>>> 192.168.0.2 and 192.168.0.3 I am working as root, but it refuses to
>>>>>>>> open eachother. I have made shared folders, but without any result.
>>>>>>>>
>>>>>>>> Regards in Lent.
>>>>>>>>
>>>>>>>> /Hilding in Gothenburg
>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
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>>>>>>>
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