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Old 08-28-2002, 06:57 AM   #1
jamaso
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simple firewall questions


Hi! I'm assuming a certain number of things here, if they are wrong,please let me know .
I've been reading some stuff (mainly howto's) about security and i'd like to ask some simple questions :
1- Can one use iptables to build both filtering and router firewalls?
2- If filtering firewalls don't work easily with dynamic IP why and how is it used then ?
3- Why would one use a static IP adress instead of a dynamic IP, since the second is safer ?
4- How can i know which open ports there are in my computer ? ( from what i understand any given program that can comunicate with the "outside" is a open port , so basically i wanted to know where and who are these programs )
thank you for your time
 
Old 08-28-2002, 07:09 AM   #2
MartBrooks
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1. What's the difference?
2. They do work easily with dynamic IP.
3. No, it isn't.
4. man netstat

Regards
 
Old 08-28-2002, 07:54 AM   #3
jamaso
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thanks for the quick and "economic" reply .
 
Old 08-28-2002, 08:17 AM   #4
jamaso
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BTW what does this mean then? (regarding question 3)
"As soon as you have a stable address and a permanent connection, you lose the 'obscurity' advantage that a dynamic IP and sporadic connection provides. You must install a real 'front door'."

taken from "Introduction to Intrusion Protection and Network Security"
 
Old 08-28-2002, 11:58 AM   #5
unSpawn
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Obscurity, referring to the phrase "security by obscurity is no security". Try www.google.com/search?q=security+by+obscurity
 
Old 08-28-2002, 12:57 PM   #6
jamaso
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thanks a lot
 
  


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