[CS-FSLUG] Networking with Ubuntu or Fedora Core 6 part 3

[Hilding]

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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