hi am configuring an internal mail server MTA postfix with Dovecot and squirrelmail webmail its on an private address behind my isps router the isp says they have portmapped port 25 and 143 to my mailserver but my userers cant recieve from out yet they can send out the nmap result on the router gives me this result nmap -P0 196.0.14.54 Starting Nmap 4.10 ( http://www.insecure.org/nmap/ ) at 2006-11-03 12:23 EAT Interesting ports on mednet.co.ug (196.0.14.54): Not shown: 1659 filtered ports PORT STATE SERVICE 20/tcp closed ftp-data 22/tcp open ssh 23/tcp open telnet 80/tcp open http 110/tcp open pop3 443/tcp closed https 500/tcp closed isakmp 587/tcp closed submission 993/tcp closed imaps 995/tcp closed pop3s 1521/tcp closed oracle 2401/tcp closed cvspserver 4500/tcp closed sae-urn 5000/tcp closed UPnP 5001/tcp closed commplex-link 5050/tcp closed mmcc 5100/tcp closed admd 8080/tcp closed http-proxy 8443/tcp closed https-alt 9090/tcp closed zeus-admin Nmap finished: 1 IP address (1 host up) scanned in 17.166 seconds root@ubuntu:/home/henryk# nmap -P0 -p 25,143,8080,80,47,1723 196.0.14.54 Starting Nmap 4.10 ( http://www.insecure.org/nmap/ ) at 2006-11-03 12:27 EAT Interesting ports on mednet.co.ug (196.0.14.54): PORT STATE SERVICE 25/tcp filtered smtp 47/tcp filtered ni-ftp 80/tcp open http 143/tcp filtered imap 1723/tcp filtered pptp 8080/tcp closed http-proxy what does the filtered mean on my port 25 its a cisco router thanx
