[CS-FSLUG] Networking with Ubuntu or Fedora Core 6 part 3
Hilding
he7316575 at yahoo.se
Mon Feb 26 13:40:55 CST 2007
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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