Re: ipmasqadm portfw

[Jens Schuessler <jgs@trash.net>]

At 16:04 05.09.01, you wrote:
>    # Send HTTP traffic to web server
>    /usr/sbin/ipmasqadm portfw -a -P tcp -L $localip 80 -R $webserver 80
>
>$ nmap localhost
>
>    Port       State       Service
>    22/tcp     open        ssh
>    25/tcp     open        smtp
>
>Shouldn't I see port 80 in this scan?

No, cause you don't provide any service on localhost:80. There's no daemon 
listening at port 80 on this machine.
If a packet comes from outside to your $localip:80 it'll be forwarded to 
the ipadress of your webserver.
I've tried your settings and it'S the same result here.

#nmap localhost

Starting nmap V. 2.12 by Fyodor (fyodor@dhp.com, www.insecure.org/nmap/)
Interesting ports on localhost (127.0.0.1):
Port    State       Protocol  Service
25      open        tcp        smtp
113     open        tcp        auth

#nmap $localip (eth0)
Interesting ports on jupiter.schnellinger.dyndns.org (192.168.10.2):
Port    State       Protocol  Service
22      open        tcp        ssh
25      open        tcp        smtp
113     open        tcp        auth

Greetings
Jens