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Thread ID: 54825	2005-02-23 09:02:00	Firewall setup	Mike_H (2538)	Press F1

Post ID	Timestamp	Content	User
327586	2005-02-23 09:02:00	I have a router / firewall for my ADSL connection, but I don't have much information on how to set up the firewall. Which ports should I leave open, which should I close? I think I need to open TCP port 80 for web TCP port 25 for mail I think I need to close TCP port 23 to stop telnet UDP port 161 to stop SNMP (it says so in the router user guide) Apart from general advice, can anyone point me (URL) to a Beginners' Guide on this topic? Thanks Mike	Mike_H (2538)
327587	2005-02-23 09:42:00	The following ports are on stealth or closed on my computer which is a Mac by the way and they are all controlled by the built- in firewall on Mac OS X automatically without any configuration . It only needs to be turned on . So for normal web and email use you do not need to have any of the listed ports open . You can check your system at this link . com/x/ne . dll?bh0bkyd2" target="_blank">grc . com Checking the Most Common and Troublesome Internet Ports 0 <nil> Closed Your computer has responded that this port exists but is currently closed to connections . 21 FTP Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 22 SSH Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 23 Telnet Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 25 SMTP Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 79 Finger Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 80 HTTP Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 110 POP3 Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 113 IDENT Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 119 NNTP Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 135 RPC Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 139 Net BIOS Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 143 IMAP Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 389 LDAP Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 443 HTTPS Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 445 MSFT DS Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 1002 ms-ils Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 1024 DCOM Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 1025 Host Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 1026 Host Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 1027 Host Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 1028 Host Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 1029 Host Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 1030 Host Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 1720 H . 323 Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! 5000 UPnP Stealth There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address!	Safari (3993)
327588	2005-03-07 06:36:00	Thanks, Safari Between the firewall user guide and your pointer to grc.com, I have managed to seal up the firewall fairly completely. Actually, a bit too completely, my kids say they can't use the audio-chat feature in MSN Messenger any more! Any ideas which port(s) I'd need to open to get that to work?	Mike_H (2538)
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