[CentOS] Inquiry:iptables ?

Rob Kampen rkampen at kampensonline.com
Mon Nov 2 18:51:53 UTC 2009

ken wrote:
> On 11/02/2009 09:36 AM Rob Kampen wrote:
>> ken wrote:
>>> On 10/31/2009 04:10 AM Tony Molloy wrote:
>>>> On Saturday 31 October 2009 07:48:05 hadi motamedi wrote:
>>>>> Dear All
>>>>> To open a port , I know that I need to go to "System ->
>>>>> Administration ->
>>>>> Security Level and Firewall" -> Other ports and then I can open
>>>>> port-5901
>>>>> as tcp protocol . Can you please do me favor and let me know how it
>>>>> can be
>>>>> done from the command line (if my CentOS is text-mode installed) ?
>>>>> (perhaps
>>>>> via iptables?)
>>>>> Let me thank you in advance
>>>> Edit /etc/sysconfig/iptables
>>>> Restart iptables with service iptables restart
>>>> Tony
>>> My /etc/sysconfig/iptables states at the top that editing of it is not
>>> recommended.  Yeah, I don't always follow such recommendations myself,
>>> but is there perhaps another way more in keeping with the sense of the
>>> application?
>> Yeah, editing directly can be risky, nothing worse than making a change
>> only to find that access to your server just disappeared and you need to
>> get in front of it to reset via the console....
>> I use webmin for most of my edits, only make it accessible from the LAN
>> and not the WAN. You can always tunnel the :10000 port via ssh and
>> access securely from a remote location.
>> The webmin console is left open while I test, thus I have not yet
>> tripped up on this though I can imagine it is not fool proof.
>> HTH
>> Rob
> Rob,
> Sounds like you've thought through the process and have a well-planned
> strategy for failure-prevention.  Cool.
> I checked my port 10000 (ssh -p 10000 ...) and found it not available
> ("Connection refused").  So in what sense, or how, can I always tunnel it?
> tnx.
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Ken, I first setup webmin on the server - this listens on port 10000 by 
default (https).
Then from a remote location I can
ssh servername -L 8081:localhost:10000
This will capture local port 8081 and tunnel to the remote server port 
Then with firefox I enter https://localhost:8081/
and I get the remote server's webmin.
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