[lug] Securing Fetchmail

D. Stimits stimits at idcomm.com
Tue Aug 7 15:45:52 MDT 2001


rotering at animalcules.com wrote:
> 
> On Tue, Aug 07, 2001 at 11:35:15AM -0600, David wrote:
> 
> > So, I have an elementary firewall (courtesy RedHat) and I think that
> > I understand how ipchains work.  But I know that there are gotchas,
> > so how secure is it?
> 
> >        :input ACCEPT
> >        :forward ACCEPT
> >        :output ACCEPT
> 
> Surely you want DENY (or REJECT) in place of ACCEPT here.  Or am I
> missing something glaringly obvious to everyone else?
> 

I think for defaults ACCEPT is correct, provided you have after that
blank deny of all, though I'd probably choose a default policy of DENY
on forwarding. Then you make a blanket rule to deny all. Any ACCEPT that
is placed between defaults and deny of all are accepted if they match.

D. Stimits, stimits at idcomm.com



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