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Re: iptable in fc5



> Hongwei Li wrote:
>> Hi,
>>  Sorry that I hit the Send before I finish it.
>>
>>  I have a question about iptables in fc5. I have iptables 1.3.5-1.2
>> installed.
>>  By default, the iptables has a line
>>  -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT
>>  ... and
>>  -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
>>
>>  I try to add the port 2049 for our lan nfs by adding aline before the above
>>  reject line:
>>
>> -A RH-Firewall-1-INPUT -s 128.252.85.0/255.255.255.0 -m state --state NEW -m
>> tcp -p tcp --dport 2049 -j ACCEPT
>
>
> That rule will only match the initial packet of the stream.  You will
> also need to match states ESTABLISHED and RELATED:
>
> -A RH-Firewall-1-INPUT -s 128.252.85.0/255.255.255.0 -m state --state
> NEW,ESTABLISHED,RELATED -p tcp --dport 2049 -j ACCEPT
>
>
>> -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
>>
>> and restart iptables.  But my other linux boxes cannot mount the exported
>> folder.  If I stop the iptable, then they can mount it.  I tried to open
>> several other ports: 137, 139, etc.  But as long as the last line is there,
>> it
>> always failed.  If I comment out the last line, then nfs works.
>>
>> What is "icmp-host-prohibited"?  How to set it to allow some requests?  It
>> seems that it is different from in fc4. Is there any link for iptables in
>> fc5
>> where I can learn more?
>>

I tried:

-A RH-Firewall-1-INPUT -s 128.252.85.0/255.255.255.0 -m state --state
NEW,ESTABLISHED,RELATED -p tcp --dport 2049 -j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited

and for other ports 137,139 etc. Still the same: as long as the last line is
there, nfs does not work.  Comment it out, problem is gone.

I will try what Arthur suggested; firestarter.  But, I still want to
understand what "icmp-host-prohibited" means and where to set it.
Thanks!

Hongwei


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