[CS-FSLUG] Networking with Ubuntu or Fedora Core 6

[Hilding]

iptables-save will give this:

# Generated by iptables-save v1.3.5 on Mon Feb 26 17:19:37 2007
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [1256:1989809]
: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 -m state --state RELATED,ESTABLISHED -j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Mon Feb 26 17:19:37 2007

Well, I may not pretend that I know what this will mean, both Accept and 
Reject. Please, could You be so kind to tell me what to do next. This is 
Fedora Core 6, not Ubuntu. Actually, my first concern is to make it 
possible to use the printer, connected to the big PC, from the small 
one. I have understood it like this: You have to read the files in 
common before even thinking about sharing the same printer.

/Hilding Egestal


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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