26 Sep
2001
26 Sep
'01
21:00
I use iptables as a firewall on my local machine to filter any incoming connections one some ports I want to protect. I have tested this with one single port and then run a portscan o that machine. nmap was not able to connect to that protected port but it marked the port as "filtered". How can I prevent this? nmap should not be able to see if and which ports are filtered. I have tried with DENY and REJECT but got the same report. You can't with ipchains, but with iptables (kernel 2.4.x). Use return-rst.
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