[CS-FSLUG] Networking with Ubuntu or Fedora Core 6 part 3
Tim Young
Tim.Young at LightSys.org
Mon Feb 26 13:54:12 CST 2007
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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