OPening ports

[jlopes151 at comcast.net]

-------------- Original message -------------- 
From: Rick Stevens <rstevens at vitalstream.com> 

> On Thu, 2005-12-15 at 21:03 +0000, jlopes151 at comcast.net wrote: 
> > > > I have RHEL 4 installed and want to open ports for an Oracle 10g 
> > > > install. Does any one know were I can find information on how this 
> > is 
> > > > done? 
> > > 
> > > I'm not certain which ports Oracle uses for network communication. 
> > It's 
> > > undoubtedly buried in the system documentation somewhere. 
> > > 
> > > Once you find those, you'll need to have them "-j ACCEPT" in your 
> > > iptables configuration. 
> > > 
> > > If you're not familiar with iptables config files, I recommend you 
> > use 
> > > either "redhat-config-securitylevel" (Desktop->System 
> > Settings->Security 
> > > Level) or something like Firestarter, available for free from 
> > > http://firestarter.sourceforge.net. 
> > > 
> > 
> > Thanks Rick 
> > 
> > Some of the ports ex:HTTP have a range 5500-5540 
> 
> Ah, then some of your config lines would have something like: 
> 
> -A INPUT -p tcp -s 0.0.0.0/0 --dport 5500:5540 -j ACCEPT 
> 
> You might want to restrict the "-s 0.0.0.0/0" to a more reasonable 
> range for the machines you want to have access. The one above opens 
> you up to connections coming from anywhere. 
> 
> > Thanks for the help 
> 
> No worries, mate! 
> 
So to set the range for say the local machine and the next in the range I would do I would -s 1.2.3.4/5? 
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