On Wed, Feb 28, 2007 at 05:38:27AM -0800, Jordi wrote: > Hello, > > I just managed to configure my server and router and ips yesterday and > now I have questions about security. I did a scan of ports and saw the > only open are the ones I opened. I also set my router firewall to > "standard". > > 1) Must I CLOSE the ports that I don't use? Or just let them not > forwaded? (they appeared as STEALTH in the ports scan) > 2) Should I use an extra firewall in my server plus the one that my > router has ? What about Firestarter? Any other good GPL firewall? > 3) Should I adjust the firewall in my router to something custom, not > standard, and what do you recommend me? > 4) I fear intruders and specially ddos. I saw a IDS called Snort that > many people use. What do you think? Any other good GPL IDS? > 5) Now that I have the server running, y suppose I must stop using > gksudo and use only sudo. Not? > You want to use shorewall:
http://www.shorewall.net The documentation is first rate, the lead developer (Tom Eastep) answers practically every question on the mailing list and in the IRC channel. Start by reading the one-interface or two-interface HOWTO (depending on how your machine is configured). Regards, -Roberto -- Roberto C. Sanchez http://people.connexer.com/~roberto http://www.connexer.com
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