iptables port range funny

Hans Lohmander hans.lohmander@ei.sigma.se
Wed, 03 Oct 2001 14:57:14 +0200


Hi,
as you DROP nmap assumes it is behind a firewall, thus filtered.
If you have no service running you get the equiv of 
REJECT --reject-with icmp-port-unreachable I belive.

/Hans

netfilter-request@lists.samba.org wrote:
> Date: Wed, 03 Oct 2001 13:15:29 +0100
> From: Tim <tim@domus29.freeserve.co.uk>
> To: netfilter@lists.samba.org
> Subject: iptables port range funny
> 
> Hi there
> 
> I can't find a reference to this, but I'm sure that it must have been
> discovered before.
> 
> I'm running iptables 1.2.1a-1.
> 
> I have a rule that blocks access to X ports (6000:6010):
>  iptables -A INPUT -i $EXTDEV -d $EXTNET -p tcp --dport 6000:6010 -j
> DROP
> 
> iptables -L -v confirms that this is in place
> 
>     0     0 DROP       tcp  --  any    eth0    217.204.229.160/28
> anywhere           tcp spts:X:6010
> 
> However, when I run nmap (against this machine, it claims that only
> ports 6000 to 6009 are filtered.
> (nmap-2.54BETA22-3 - RedHat 7.1).
> 
> Which is broken??
> 
> Anyone else seen this?
> 
> tc
> 
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