hola a todos hace un tiempo estuve instalando qmail pero en algun momento de la instalacion hice que bloqueara los pines con nmap que hago localmente. estos son los comandos que doy: linux:~ # ifconfig eth0 Link encap:Ethernet HWaddr 00:07:95:30:91:36 inet addr:192.168.5.172 Bcast:192.168.5.255 Mask:255.255.255.0 inet6 addr: fe80::207:95ff:fe30:9136/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:436 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:0 (0.0 b) TX bytes:26485 (25.8 Kb) Interrupt:5 Base address:0xcc00 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:8225 errors:0 dropped:0 overruns:0 frame:0 TX packets:8225 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:349618 (341.4 Kb) TX bytes:349618 (341.4 Kb) linux:~ # nmap localhost Starting nmap 3.30 ( http://www.insecure.org/nmap/ ) at 2004-12-29 21:06 CST Note: Host seems down. If it is really up, but blocking our ping probes, try -P0 Nmap run completed -- 1 IP address (0 hosts up) scanned in 12.056 seconds linux:~ # nmap 192.168.5.172 Starting nmap 3.30 ( http://www.insecure.org/nmap/ ) at 2004-12-29 21:06 CST Note: Host seems down. If it is really up, but blocking our ping probes, try -P0 Nmap run completed -- 1 IP address (0 hosts up) scanned in 12.056 seconds linux:~ # luego leyendo cosbre nmap encontre unas opciones y probe con esto linux:~ # nmap -p 22,80 -sX -P0 -D 1.2.3 localhost Starting nmap 3.30 ( http://www.insecure.org/nmap/ ) at 2004-12-29 21:09 CST Interesting ports on localhost (127.0.0.1): Port State Service 22/tcp open ssh 80/tcp open http Nmap run completed -- 1 IP address (1 host up) scanned in 12.019 seconds linux:~ # nmap -p 22,80 -sX -P0 -D 1.2.3 192.168.5.172 Starting nmap 3.30 ( http://www.insecure.org/nmap/ ) at 2004-12-29 21:09 CST Interesting ports on linux.localhost (192.168.5.172): Port State Service 22/tcp open ssh 80/tcp open http Nmap run completed -- 1 IP address (1 host up) scanned in 12.037 seconds linux:~ # que pasa_