Dear Mailing list members I have an Postfix mail server, which listen on my computer's 25 port, I redirected it to my adsl's
25 port, but over there it does not listen. I do not know why. I scanned the localhost with nmap port scanner, afterwards I scanned my wan IP address with nmap port scanner. I found some differences among these port scan's results: First time, I scanned my localhost: nmap -A localhost Starting nmap 3.81 ( http://www.insecure.org/nmap/ ) at 2007-09-06 07:21 CEST Interesting ports on localhost (127.0.0.1): (The 1638 ports scanned but not shown below are in state: closed) PORT STATE SERVICE VERSION 21/tcp open ftp vsFTPd 2.0.3 22/tcp open ssh OpenSSH 4.1 (protocol 1.99) 23/tcp open telnet Linux telnetd 25/tcp open smtp Postfix smtpd 53/tcp open domain 80/tcp open http Apache httpd 2.0.54 ((Linux/SUSE)) 109/tcp open pop2? 110/tcp open pop3 UW Imap pop3 server 2004.89 111/tcp open rpcbind 2 (rpc #100000) 139/tcp open netbios-ssn Samba smbd 3.X (workgroup: TUX-NET) 143/tcp open imap UW imapd 2004.356 199/tcp open smux Linux SNMP multiplexer 389/tcp open ldap? 445/tcp open netbios-ssn Samba smbd 3.X (workgroup: TUX-NET) 631/tcp open ipp CUPS 1.1 783/tcp open hp-alarm-mgr? 901/tcp open http Samba SWAT administration server 904/tcp open unknown 953/tcp open rndc? 993/tcp open imaps? 995/tcp open pop3s? 1723/tcp open pptp? 3128/tcp open http-proxy Squid webproxy 2.5.STABLE10 3306/tcp open mysql MySQL 4.1.13 10000/tcp open http Webmin httpd Afterwards, I scanned my wan IP: (dsl5401A6CA.pool.t-online.hu, 84.1.166.202, it is a dynamic address) nmap -A 84.1.166.202 Starting nmap 3.81 ( http://www.insecure.org/nmap/ ) at 2007-09-06 07:20 CEST linux:~ # Interesting ports on dsl5401A6CA.pool.t-online.hu (84.1.166.202): (The 1654 ports scanned but not shown below are in state: filtered) PORT STATE SERVICE VERSION 21/tcp open ftp vsFTPd 2.0.3 23/tcp open telnet Linux telnetd 25/tcp closed smtp 80/tcp open http Apache httpd 2.0.54 ((Linux/SUSE)) 110/tcp open pop3 143/tcp open imap UW Imapd 2004.356 901/tcp open http Samba SWAT administration server 3128/tcp open http-proxy Squid webproxy 2.5.STABLE10 10000/tcp open http Webmin httpd I have an SMC 7400 VBR adsl router, so if I would like to achieve that my servers will be listening my adsl's (my wan ip) ip address, I will have to ports forward from the 192.168.2.157 (my computer IP address) to my wan ip (my adsl modem's IP address). I configured my SMC 7400 VBR adsl router's web interface's virtual server/port forwarding menu as: (Virtual Server You can configure the Barricade as a virtual server so that remote users accessing services such as the Web or FTP at your local site via public IP addresses can be automatically redirected to local servers configured with private IP addresses. In other words, depending on the requested service (TCP/UDP port number), the Wireless Barricade redirects the external service request to the appropriate server (located at another internal IP address).) Well known services : ID ID IP Address Public Port/s Private Port/s Data Type Enable 1 192.168.2.157 21 21 ftp yes 2 192.168.2.157 23 23 telnet yes 3 192.168.2.157 25 25 smtp yes 4 192.168.2.157 80 80 http yes 5 192.168.2.157 110 110 pop3 yes 6 192.168.2.157 143 143 pop3 yes 7 192.168.2.157 901 901 http yes 8 192.168.2.157 3128 3128 http yes 9 192.168.2.157 10000 10000 http yes 10 192.168.2.157 21332 21332 http yes I do not know, why closed my wan ip address' 25 port? I redirected it from my computer's IP to my adsl's IP address. 25/tcp closed smtp Do you know why it closed? Best Regards, WM "Diszlexiás-e a gyermekem?" - 25 kérdéses gyorsteszt (hálás lesz utána, akármi is az eredmény!) A látható link a következõ: http://www.varazsbetu.hu/diszlexiateszt ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
