Thanks for the help, everyone. I really appreciate it.
-Halcyon
----- Original Message -----
From: "Burke, Thomas G." <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, January 04, 2001 11:59 AM
Subject: RE: blackhole firewall rules
> There ya have it - the solution.
>
> > -----Original Message-----
> > From: Thornton Prime [SMTP:[EMAIL PROTECTED]]
> > Sent: Thursday, January 04, 2001 2:57 PM
> > To: '[EMAIL PROTECTED]'
> > Subject: RE: blackhole firewall rules
> >
> > On Thu, 4 Jan 2001, Burke, Thomas G. wrote:
> >
> > > I know you can block specific hosts, but I'm not sure you can block
> > specific
> > > ports on those hosts... You wouldn't want to block their server
> > completely,
> > > as all traffic probably passes through it.
> > >
> > > To do that, tho, you can do this:
> > > $IPCHAINS -A input -l -s XXX.XXX.XXX.XXX -d $EXTERNAL_NET -j DENY
> > >
> > > I don't know about blocking a specific port, though...
> >
> > Same rule, pretty much, but you'll need to add the port (or port range)
> > and a protocol identifier:
> >
> > $IPCHAINS -A input -l -p tcp
> > -s XXX.XXX.XXX.XXX fromlo:fromhi \
> > -d $EXTERNAL_NET tolo:tohi -j DENY
> >
> > Where fromlo/fromhi/tolo/tohi are your low and high source and
> > destination ports.
> >
> > You will probably want to repeat the rule with '-p udp' to block UDP
> > access also.
> >
> > thornton
> >
> >
> >
> > _______________________________________________
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>
>
>
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